/* ===================== 观衡科技 · 主题变量 ===================== */
:root,[data-theme="dark"]{
  --bg:#05080f; --bg-2:#070c17;
  --surface:#0b1324; --card-bg:linear-gradient(170deg,#0d1729,#080e1b); --card-fade:#0b1424;
  --line:rgba(140,200,255,.12); --line-2:rgba(140,200,255,.22);
  --txt:#eef3fb; --txt-2:#aab7ca; --txt-3:#8592a8;
  --accent:#45e6ff; --accent-2:#2a8cff; --accent-ink:#5fe9ff; --gold:#e6c27a; --gold-ink:#e6c27a;
  --grad:linear-gradient(100deg,#7af6ff 0%,#45e6ff 35%,#5aa8ff 100%);
  --grad-gold:linear-gradient(100deg,#fbe9bd 0%,#e6c27a 45%,#c7964a 100%);
  --btn-gold-txt:#1a1205;
  --glass-bg:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  --glass-border:rgba(140,200,255,.2);
  --glass-shadow:0 20px 60px -20px rgba(0,0,0,.6),inset 0 1px 0 rgba(255,255,255,.08);
  --header-bg:rgba(5,8,15,.72);
  --ghost-bg:rgba(255,255,255,.04); --ghost-border:rgba(255,255,255,.28); --ghost-txt:#fff;
  --chip-bg:rgba(255,255,255,.02);
  --field-bg:rgba(255,255,255,.04);
  --ambient-1:rgba(42,140,255,.10); --ambient-2:rgba(69,230,255,.06);
  --card-shadow:0 1px 0 rgba(255,255,255,.03) inset;
  --card-shadow-hover:0 40px 80px -30px rgba(0,0,0,.8),0 0 60px -20px rgba(69,230,255,.25);
  --hero-shade:linear-gradient(90deg,rgba(5,8,15,.94) 0%,rgba(5,8,15,.78) 30%,rgba(5,8,15,.25) 58%,rgba(5,8,15,.1) 100%),linear-gradient(180deg,rgba(5,8,15,.55) 0%,transparent 22%,transparent 68%,var(--bg) 100%);
  --hero-shade-m:linear-gradient(180deg,rgba(5,8,15,.35) 0%,rgba(5,8,15,.05) 25%,rgba(5,8,15,.72) 52%,rgba(5,8,15,.96) 72%,var(--bg) 100%);
  --hero-title-shadow:0 10px 40px rgba(0,0,0,.4);
  --grid-line:rgba(120,200,255,.07);
  --poster:url(../img/hero-poster.webp); --poster-m:url(../img/hero-poster-m.webp);
  --adv-img:url(../img/tech_bg.webp); --adv-img-m:url(../img/tech_bg-m.webp); --adv-op:.55;
  --cta-img:url(../img/cta_bg.webp); --cta-img-m:url(../img/cta_bg-m.webp); --cta-op:.5;
  --cta-shade:linear-gradient(90deg,rgba(5,8,15,.92) 0%,rgba(5,8,15,.75) 45%,rgba(5,8,15,.35) 100%);
  --marquee-bg:linear-gradient(90deg,rgba(69,230,255,.04),rgba(230,194,122,.04));
  --footer-bg:#04060c;
  --logo-c1:#5ff3ff; --logo-c2:#2a8cff; --logo-g1:#f6dfa4; --logo-g2:#c7964a;
  --stroke-num:rgba(255,255,255,.55); --stroke-step:rgba(230,194,122,.6);
  --scene-glass:linear-gradient(160deg,rgba(8,14,27,.78),rgba(8,14,27,.55));
  --phone-frame:#0e1626;
  --danger:#ff6b70;
  color-scheme:dark;
}
[data-theme="light"]{
  --bg:#f7f5f0; --bg-2:#f0ede6;
  --surface:#ffffff; --card-bg:linear-gradient(175deg,#ffffff,#fbfaf7); --card-fade:#ffffff;
  --line:rgba(22,32,52,.09); --line-2:rgba(22,32,52,.15);
  --txt:#0f1623; --txt-2:#465265; --txt-3:#566174;
  --accent:#0aa3bf; --accent-2:#2a6bff; --accent-ink:#06788f; --gold:#c39545; --gold-ink:#8a611f;
  --grad:linear-gradient(100deg,#0796b3 0%,#0a86c9 45%,#2a5fe0 100%);
  --grad-gold:linear-gradient(100deg,#9a6b22 0%,#8a5e1c 50%,#6f4a12 100%);
  --btn-gold-txt:#fff;
  --glass-bg:linear-gradient(160deg,rgba(255,255,255,.92),rgba(255,255,255,.72));
  --glass-border:rgba(22,32,52,.09);
  --glass-shadow:0 1px 2px rgba(16,24,40,.04),0 18px 40px -18px rgba(16,24,40,.16);
  --header-bg:rgba(250,249,246,.78);
  --ghost-bg:rgba(255,255,255,.6); --ghost-border:rgba(15,22,35,.18); --ghost-txt:#0f1623;
  --chip-bg:#f6f4ef;
  --field-bg:#ffffff;
  --ambient-1:rgba(10,163,191,.07); --ambient-2:rgba(195,149,69,.06);
  --card-shadow:0 1px 2px rgba(16,24,40,.04),0 12px 32px -14px rgba(16,24,40,.12);
  --card-shadow-hover:0 2px 4px rgba(16,24,40,.04),0 34px 60px -24px rgba(16,24,40,.22),0 0 0 1px rgba(10,163,191,.12);
  --hero-shade:linear-gradient(90deg,rgba(247,245,240,.97) 0%,rgba(247,245,240,.88) 28%,rgba(247,245,240,.35) 55%,rgba(247,245,240,0) 75%),linear-gradient(180deg,rgba(247,245,240,.6) 0%,transparent 20%,transparent 72%,var(--bg) 100%);
  --hero-shade-m:linear-gradient(180deg,rgba(247,245,240,.4) 0%,rgba(247,245,240,0) 24%,rgba(247,245,240,.8) 50%,rgba(247,245,240,.97) 68%,var(--bg) 100%);
  --hero-title-shadow:none;
  --grid-line:rgba(15,40,80,.06);
  --poster:url(../img/hero-light-poster.webp); --poster-m:url(../img/hero-light-poster-m.webp);
  --adv-img:url(../img/tech_bg_light.webp); --adv-img-m:url(../img/tech_bg_light-m.webp); --adv-op:.9;
  --cta-img:url(../img/cta_bg_light.webp); --cta-img-m:url(../img/cta_bg_light-m.webp); --cta-op:.85;
  --cta-shade:linear-gradient(90deg,rgba(247,245,240,.95) 0%,rgba(247,245,240,.78) 45%,rgba(247,245,240,.2) 100%);
  --marquee-bg:linear-gradient(90deg,rgba(10,163,191,.05),rgba(195,149,69,.06));
  --footer-bg:#efece5;
  --logo-c1:#0aa3bf; --logo-c2:#2a6bff; --logo-g1:#d9ad5c; --logo-g2:#a8772a;
  --stroke-num:rgba(255,255,255,.8); --stroke-step:rgba(160,113,31,.55);
  --scene-glass:linear-gradient(160deg,rgba(255,255,255,.94),rgba(255,255,255,.84));
  --phone-frame:#1a2233;
  --danger:#c62f36;
  color-scheme:light;
}
:root{--ease:cubic-bezier(.2,.75,.2,1);
  --font:"PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei","Noto Sans CJK SC","Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  --en:"Inter","SF Pro Display","Segoe UI","Helvetica Neue",Arial,sans-serif;}

/* ===================== base ===================== */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:72px}
body{background:var(--bg);color:var(--txt);font-family:var(--font);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden;text-rendering:optimizeLegibility}
body.menu-open,html.menu-lock{overflow:hidden}
img,video{display:block;max-width:100%}
img{height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{list-style:none}
svg{fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
::selection{background:color-mix(in srgb,var(--accent) 30%,transparent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
.skip-link{position:fixed;left:16px;top:-60px;z-index:1000;padding:10px 18px;border-radius:10px;background:var(--accent);color:#001218;font-weight:600;transition:top .3s}
.skip-link:focus{top:16px}
.skip-link:not(:focus){clip-path:inset(50%);opacity:0}
.container{width:min(1240px,100% - 48px);width:min(1240px,100% - 2 * max(24px,env(safe-area-inset-left),env(safe-area-inset-right)));margin:0 auto}
.text-grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-style:normal}
.text-grad-gold{background:var(--grad-gold);-webkit-background-clip:text;background-clip:text;color:transparent}
.mono{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;letter-spacing:.04em}
.glass{background:var(--glass-bg);border:1px solid var(--glass-border);-webkit-backdrop-filter:blur(18px) saturate(140%);backdrop-filter:blur(18px) saturate(140%);box-shadow:var(--glass-shadow)}
.note{font-size:12.5px;color:var(--txt-3);letter-spacing:.02em}
body::before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:0;background:radial-gradient(900px 600px at 85% -10%,var(--ambient-1),transparent 60%),radial-gradient(700px 500px at -10% 40%,var(--ambient-2),transparent 60%)}
main,footer{position:relative;z-index:1}

/* theme switch transition (fallback when View Transitions unsupported) */
html.theme-anim,html.theme-anim *,html.theme-anim *::before,html.theme-anim *::after{transition:background-color .6s var(--ease),color .6s var(--ease),border-color .6s var(--ease),box-shadow .6s var(--ease),fill .6s,stroke .6s!important}
::view-transition-old(root),::view-transition-new(root){animation:none;mix-blend-mode:normal}
::view-transition-new(root){z-index:2}

/* loader */
.page-loader{display:none;position:fixed;top:0;right:0;bottom:0;left:0;z-index:999;background:var(--bg);place-items:center;transition:opacity .7s var(--ease),visibility .7s}
.page-loader svg{width:60px;height:60px;animation:spin 2.4s linear infinite}
.js .page-loader{display:grid;animation:loaderOut .7s 3s forwards}
body.loaded .page-loader{opacity:0;visibility:hidden}
@keyframes loaderOut{to{opacity:0;visibility:hidden}}
@keyframes spin{to{transform:rotate(360deg)}}

/* buttons */
.btn{--h:52px;display:inline-flex;align-items:center;justify-content:center;gap:10px;height:var(--h);padding:0 28px;border-radius:999px;font-size:15.5px;font-weight:600;letter-spacing:.06em;position:relative;overflow:hidden;transition:transform .35s var(--ease),box-shadow .35s var(--ease),background .35s,border-color .35s,color .35s;white-space:nowrap}
.btn svg{width:18px;height:18px;stroke-width:2;transition:transform .35s var(--ease);flex-shrink:0}
.btn:hover svg{transform:translateX(4px)}
.btn-gold{background:var(--grad-gold);color:var(--btn-gold-txt);box-shadow:0 10px 30px -10px color-mix(in srgb,var(--gold) 70%,transparent)}
.btn-gold::after{content:"";position:absolute;top:0;left:-60%;width:40%;height:100%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.5),transparent);transform:skewX(-20deg);transition:left .7s var(--ease)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 18px 40px -12px color-mix(in srgb,var(--gold) 85%,transparent)}
.btn-gold:hover::after{left:130%}
.btn-ghost{border:1px solid var(--ghost-border);background:var(--ghost-bg);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:var(--ghost-txt)}
.btn-ghost:hover{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 10%,transparent);transform:translateY(-2px)}
.btn-ghost .play{fill:currentColor;stroke:none;width:14px;height:14px}
.btn-ghost:hover .play{transform:none}
.btn-sm{--h:40px;padding:0 20px;font-size:14px}
.btn-block{width:100%}
.btn[disabled]{opacity:.7;pointer-events:none}

/* header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .4s,backdrop-filter .4s,border-color .4s,box-shadow .4s;border-bottom:1px solid transparent}
.site-header.scrolled{background:var(--header-bg);-webkit-backdrop-filter:blur(18px) saturate(160%);backdrop-filter:blur(18px) saturate(160%);border-color:var(--line)}
[data-theme="light"] .site-header.scrolled{box-shadow:0 8px 30px -18px rgba(16,24,40,.18)}
.nav-wrap{height:78px;display:flex;align-items:center;gap:28px;transition:height .4s}
.scrolled .nav-wrap{height:66px}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{width:38px;height:38px;transition:transform .8s var(--ease)}
.brand:hover .brand-mark{transform:rotate(180deg)}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:19px;letter-spacing:.18em;font-weight:700}
.brand-text em{font-style:normal;font-family:var(--en);font-size:9.5px;letter-spacing:.32em;color:var(--txt-2)}
.main-nav{display:flex;gap:2px;margin-left:auto}
.main-nav a{position:relative;padding:8px 13px;font-size:14.5px;color:var(--txt-2);letter-spacing:.05em;transition:color .3s;border-radius:8px}
.main-nav a::after{content:"";position:absolute;left:50%;right:50%;bottom:2px;height:2px;border-radius:2px;background:var(--grad);transition:left .35s var(--ease),right .35s var(--ease)}
.main-nav a:hover,.main-nav a.active{color:var(--txt)}
.main-nav a:hover::after,.main-nav a.active::after{left:13px;right:13px}
.nav-actions{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;width:44px;height:44px;position:relative}
.nav-toggle span{position:absolute;left:11px;right:11px;height:2px;background:var(--txt);border-radius:2px;transition:transform .4s var(--ease),opacity .3s}
.nav-toggle span:nth-child(1){top:15px}.nav-toggle span:nth-child(2){top:21px;right:17px}.nav-toggle span:nth-child(3){top:27px}
.menu-open .nav-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-open .nav-toggle span:nth-child(2){opacity:0}
.menu-open .nav-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.scroll-progress{position:absolute;left:0;right:0;bottom:-1px;height:2px}
.scroll-progress i{display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;background:var(--grad);box-shadow:0 0 10px var(--accent)}

/* theme toggle (sun / moon) */
.theme-toggle{position:relative;width:62px;height:32px;border-radius:999px;flex-shrink:0;padding:0}
.tt-track{position:absolute;top:0;right:0;bottom:0;left:0;border-radius:inherit;overflow:hidden;border:1px solid var(--line-2);background:linear-gradient(135deg,#0b1730,#162a52);transition:background .6s var(--ease),border-color .4s}
[data-theme="light"] .tt-track{background:linear-gradient(135deg,#bfe9f3,#ffe7b8)}
.tt-stars i{position:absolute;width:2px;height:2px;border-radius:50%;background:#fff;opacity:.9;transition:opacity .4s,transform .6s var(--ease)}
.tt-stars i:nth-child(1){left:12px;top:8px}.tt-stars i:nth-child(2){left:20px;top:18px;width:1.5px;height:1.5px}.tt-stars i:nth-child(3){left:9px;top:21px;width:1.5px;height:1.5px}
[data-theme="light"] .tt-stars i{opacity:0;transform:translateY(8px)}
.tt-knob{position:absolute;top:3px;left:33px;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(145deg,#f2f6ff,#c9d6ee);box-shadow:0 2px 8px rgba(0,0,0,.35);transition:left .55s cubic-bezier(.5,1.6,.4,1),background .5s,transform .55s var(--ease)}
[data-theme="light"] .tt-knob{left:3px;background:linear-gradient(145deg,#ffd77a,#f3a83b);box-shadow:0 2px 10px rgba(243,168,59,.55)}
.tt-knob svg{position:absolute;width:15px;height:15px;stroke-width:2;transition:opacity .4s,transform .55s var(--ease)}
.tt-sun{color:#fff;opacity:0;transform:rotate(-90deg) scale(.4)}
.tt-moon{color:#334566;fill:#334566;stroke:none;opacity:1}
[data-theme="light"] .tt-sun{opacity:1;transform:none}
[data-theme="light"] .tt-moon{opacity:0;transform:rotate(90deg) scale(.4)}
.theme-toggle:hover .tt-knob{transform:scale(1.08)}
.theme-toggle:hover .tt-track{border-color:var(--accent)}

/* mobile menu */
.mobile-menu{position:fixed;top:0;right:0;bottom:0;left:0;z-index:90;background:var(--bg);background:color-mix(in srgb,var(--bg) 96%,transparent);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);padding:96px 28px calc(28px + env(safe-area-inset-bottom));display:flex;flex-direction:column;justify-content:space-between;opacity:0;visibility:hidden;transition:opacity .4s,visibility .4s;overflow-y:auto}
.menu-open .mobile-menu{opacity:1;visibility:visible}
.mobile-menu nav a{display:flex;align-items:baseline;gap:16px;font-size:23px;font-weight:600;padding:12px 0;border-bottom:1px solid var(--line);letter-spacing:.08em;transform:translateY(20px);opacity:0;transition:transform .5s var(--ease),opacity .5s}
.mobile-menu nav a span{font-family:var(--en);font-size:12px;color:var(--accent-ink);letter-spacing:.2em}
.menu-open .mobile-menu nav a{transform:none;opacity:1}
.menu-open .mobile-menu nav a:nth-child(2){transition-delay:.04s}.menu-open .mobile-menu nav a:nth-child(3){transition-delay:.08s}.menu-open .mobile-menu nav a:nth-child(4){transition-delay:.12s}.menu-open .mobile-menu nav a:nth-child(5){transition-delay:.16s}.menu-open .mobile-menu nav a:nth-child(6){transition-delay:.2s}.menu-open .mobile-menu nav a:nth-child(7){transition-delay:.24s}
.mm-foot{display:grid;gap:16px;margin-top:28px}
.mm-theme{display:flex;align-items:center;gap:8px;padding:6px;border-radius:999px;border:1px solid var(--line-2);background:var(--chip-bg)}
.mm-label{font-size:13px;color:var(--txt-3);padding:0 10px 0 12px;letter-spacing:.1em}
.mm-theme button{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;height:42px;border-radius:999px;font-size:15px;color:var(--txt-2);transition:all .4s var(--ease)}
.mm-theme button svg{width:18px;height:18px}
.mm-theme button[aria-checked="true"]{background:var(--grad-gold);color:var(--btn-gold-txt);font-weight:600;box-shadow:0 6px 16px -8px var(--gold)}
.mm-theme button[data-set-theme="dark"] svg{fill:currentColor;stroke:none}

/* ===================== hero ===================== */
.hero{position:relative;min-height:100vh;min-height:100svh;display:flex;align-items:center;overflow:hidden;isolation:isolate}
.hero-media{position:absolute;top:0;right:0;bottom:0;left:0;z-index:-3;will-change:transform}
.hero-poster,.hero-video{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%}
.hero-poster{background:var(--poster) 62% 30%/cover no-repeat}
.hero-video{object-fit:cover;object-position:62% 30%;opacity:0;transition:opacity 1.2s}
.hero-video.ready{opacity:1}
.hero-shade{position:absolute;top:0;right:0;bottom:0;left:0;z-index:-2;background:var(--hero-shade)}
.hero-grid-lines{position:absolute;top:0;right:0;bottom:0;left:0;z-index:-1;pointer-events:none;opacity:.35;background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);background-size:80px 80px;-webkit-mask-image:radial-gradient(ellipse 60% 70% at 15% 55%,#000 0%,transparent 70%);mask-image:radial-gradient(ellipse 60% 70% at 15% 55%,#000 0%,transparent 70%)}
.hero-inner{position:relative;display:flex;align-items:flex-end;justify-content:space-between;gap:40px;padding:140px 0 120px}
.hero-copy{max-width:660px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--en);font-size:12.5px;letter-spacing:.26em;color:var(--accent-ink);padding:8px 16px;border:1px solid color-mix(in srgb,var(--accent) 35%,transparent);border-radius:999px;background:color-mix(in srgb,var(--accent) 7%,transparent)}
.dot-live{width:7px;height:7px;border-radius:50%;background:var(--accent);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--accent) 60%,transparent)}70%{box-shadow:0 0 0 10px transparent}100%{box-shadow:0 0 0 0 transparent}}
.hero-title{margin:26px 0 22px;font-size:clamp(40px,5.4vw,76px);line-height:1.16;font-weight:800;letter-spacing:.04em;text-shadow:var(--hero-title-shadow)}
.hero-title .ln{display:block;overflow:hidden;padding-bottom:.06em;margin-bottom:-.06em}
.hero-title .ln>span{display:inline-block;white-space:nowrap;transition:transform 1.1s var(--ease)}
.js .hero-title .ln>span{transform:translateY(105%)}
.hero-title .ln:nth-child(2)>span{transition-delay:.12s}.hero-title .ln:nth-child(3)>span{transition-delay:.24s}
.js body.loaded .hero-title .ln>span{transform:none}
.hero-sub{font-size:17px;color:var(--txt-2);max-width:580px;line-height:1.95}
.hero-sub b{color:var(--txt);font-weight:600}
.hero-actions{display:flex;flex-wrap:wrap;gap:16px;margin-top:38px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:40px;font-size:13.5px;color:var(--txt-2)}
.hero-tags li{display:flex;align-items:center;gap:8px}
.hero-tags li::before{content:"";width:14px;height:1px;background:var(--gold)}
.hero-card{width:300px;border-radius:20px;padding:20px 22px;flex-shrink:0;margin-bottom:6px}
.hc-head{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--txt-2)}
.live-badge{display:inline-flex;align-items:center;gap:6px;font-family:var(--en);font-weight:700;font-size:11px;letter-spacing:.14em;color:#fff;background:linear-gradient(90deg,#e8204f,#f2552f);padding:3px 9px;border-radius:6px}
.live-badge i{width:6px;height:6px;border-radius:50%;background:#fff;animation:blink 1.2s infinite}
@keyframes blink{50%{opacity:.2}}
.hc-wave{display:flex;align-items:center;gap:4px;height:46px;margin:16px 0 12px}
.hc-wave i{flex:1;height:100%;transform:scaleY(.3);border-radius:3px;background:var(--grad);animation:wave 1.1s ease-in-out infinite}
.hc-wave i:nth-child(odd){animation-duration:.9s}.hc-wave i:nth-child(3n){animation-duration:1.4s}
.hc-wave i:nth-child(2){animation-delay:-.2s}.hc-wave i:nth-child(3){animation-delay:-.5s}.hc-wave i:nth-child(4){animation-delay:-.3s}.hc-wave i:nth-child(5){animation-delay:-.7s}.hc-wave i:nth-child(6){animation-delay:-.1s}.hc-wave i:nth-child(7){animation-delay:-.6s}.hc-wave i:nth-child(8){animation-delay:-.4s}.hc-wave i:nth-child(9){animation-delay:-.8s}.hc-wave i:nth-child(10){animation-delay:-.25s}.hc-wave i:nth-child(11){animation-delay:-.55s}.hc-wave i:nth-child(12){animation-delay:-.15s}.hc-wave i:nth-child(13){animation-delay:-.65s}.hc-wave i:nth-child(14){animation-delay:-.35s}.hc-wave i:nth-child(15){animation-delay:-.75s}.hc-wave i:nth-child(16){animation-delay:-.45s}
@keyframes wave{0%,100%{transform:scaleY(.18)}50%{transform:scaleY(1)}}
.hc-row{display:flex;justify-content:space-between;padding:9px 0;border-top:1px solid var(--line);font-size:13.5px;color:var(--txt-2)}
.hc-row b{color:var(--txt);font-weight:600}
.scroll-cue{position:absolute;left:50%;bottom:28px;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:10px;font-family:var(--en);font-size:10px;letter-spacing:.4em;color:var(--txt-3)}
.scroll-cue span{width:1px;height:46px;background:linear-gradient(var(--accent),transparent);position:relative;overflow:hidden}
.scroll-cue span::after{content:"";position:absolute;left:0;top:0;width:100%;height:50%;background:var(--txt);transform:translateY(-100%);animation:drop 2s infinite}
@keyframes drop{to{transform:translateY(200%)}}

/* marquee */
.marquee{position:relative;z-index:2;border-block:1px solid var(--line);background:var(--marquee-bg);overflow:hidden;padding:20px 0}
.marquee-track{display:flex;align-items:center;gap:36px;width:max-content;animation:marq 40s linear infinite;font-size:16px;letter-spacing:.24em;color:var(--txt-2);white-space:nowrap}
.marquee-track i{font-style:normal;color:var(--gold);font-size:10px}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes marq{to{transform:translateX(-50%)}}

/* sections */
.section{position:relative;padding:140px 0}
.section-head{text-align:center;max-width:780px;margin:0 auto 72px}
.section-head.left{text-align:left;margin:0 0 48px}
.kicker{display:inline-flex;align-items:center;gap:14px;font-family:var(--en);font-size:12.5px;letter-spacing:.34em;color:var(--txt-2);margin-bottom:22px}
.kicker span{font-weight:700;color:var(--gold-ink);letter-spacing:.1em;padding-right:14px;border-right:1px solid var(--line-2)}
.section-head h2,.contact-copy h2{font-size:clamp(30px,3.6vw,50px);line-height:1.3;font-weight:800;letter-spacing:.04em}
.lead{margin-top:22px;font-size:16.5px;color:var(--txt-2);line-height:1.95}
.sample-badge{display:inline-block;font-size:12.5px;letter-spacing:.08em;color:var(--gold-ink);border:1px dashed color-mix(in srgb,var(--gold) 65%,transparent);padding:4px 14px;border-radius:999px;background:color-mix(in srgb,var(--gold) 8%,transparent);line-height:1.6}
.sample-badge.inline{margin-left:10px;vertical-align:middle}

/* services */
.svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.svc-card{position:relative;border-radius:24px;overflow:hidden;background:var(--card-bg);border:1px solid var(--line);box-shadow:var(--card-shadow);transition:transform .6s var(--ease),border-color .4s,box-shadow .6s var(--ease);transform-style:preserve-3d}
.svc-card::before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:inherit;padding:1px;background:radial-gradient(500px circle at var(--mx,50%) var(--my,0%),color-mix(in srgb,var(--accent) 60%,transparent),transparent 45%);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .4s;pointer-events:none;z-index:3}
.svc-card:hover{border-color:transparent;box-shadow:var(--card-shadow-hover)}
.svc-card:hover::before{opacity:1}
.svc-media{position:relative;aspect-ratio:16/9;overflow:hidden}
.svc-media img,.svc-media video{width:100%;height:100%;object-fit:cover;transition:transform 1.2s var(--ease),opacity .6s}
.svc-media video{position:absolute;top:0;right:0;bottom:0;left:0;opacity:0}
.svc-card:hover .svc-media img,.svc-card:hover .svc-media video{transform:scale(1.06)}
.svc-card.playing .svc-media video{opacity:1}
.svc-media::after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(180deg,transparent 45%,var(--card-fade) 100%)}
[data-theme="light"] .svc-media::after{background:linear-gradient(180deg,transparent 62%,var(--card-fade) 100%)}
.svc-no{position:absolute;right:22px;top:16px;z-index:2;font-family:var(--en);font-size:56px;font-weight:800;line-height:1;color:transparent;-webkit-text-stroke:1px var(--stroke-num);text-shadow:0 2px 20px rgba(0,0,0,.25)}
.svc-play{position:absolute;left:22px;top:20px;z-index:2;display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.1em;color:#fff;padding:5px 12px 5px 10px;border-radius:999px;background:rgba(5,8,15,.55);border:1px solid rgba(255,255,255,.2);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);transition:opacity .4s}
.svc-play::before{content:"";border-left:7px solid #45e6ff;border-top:5px solid transparent;border-bottom:5px solid transparent}
.svc-card.playing .svc-play{opacity:0}
.svc-body{position:relative;padding:0 36px 36px;margin-top:-34px;z-index:2}
.svc-icon{width:64px;height:64px;border-radius:18px;display:grid;place-items:center;background:linear-gradient(150deg,color-mix(in srgb,var(--accent) 18%,var(--surface)),color-mix(in srgb,var(--accent-2) 6%,var(--surface)));border:1px solid color-mix(in srgb,var(--accent) 35%,transparent);box-shadow:0 10px 30px -10px color-mix(in srgb,var(--accent) 45%,transparent);margin-bottom:22px;transition:transform .5s var(--ease)}
.svc-card:hover .svc-icon{transform:translateY(-4px) rotate(-4deg)}
.svc-icon svg{width:34px;height:34px;color:var(--accent-ink)}
svg .fill{fill:currentColor;stroke:none}
svg .gold{fill:var(--gold);stroke:none}
svg .gold-stroke{stroke:var(--gold)}
svg .dash{stroke-dasharray:3 3}
.svc-body h3{font-size:26px;font-weight:700;letter-spacing:.06em}
.svc-slogan{margin:4px 0 12px;font-size:14px;color:var(--gold-ink);letter-spacing:.08em}
.svc-body p:not(.svc-slogan){color:var(--txt-2);font-size:15.5px;line-height:1.9}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 24px}
.chips li{font-size:12.5px;padding:4px 12px;border-radius:999px;border:1px solid var(--line-2);color:var(--txt-2);background:var(--chip-bg);transition:all .3s}
.svc-card:hover .chips li{border-color:color-mix(in srgb,var(--accent) 40%,transparent);color:var(--txt)}
.link-more{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:600;color:var(--gold-ink);letter-spacing:.06em}
.link-more svg{width:18px;height:18px;stroke-width:2;transition:transform .35s var(--ease)}
.link-more:hover svg{transform:translateX(6px)}

/* demo */
.demo{overflow:hidden;background:linear-gradient(180deg,transparent,var(--bg-2) 30%,var(--bg-2) 70%,transparent)}
.demo-inner{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.feat-list{display:grid;gap:12px}
.feat button{width:100%;display:flex;gap:18px;align-items:flex-start;text-align:left;padding:20px 22px;border-radius:18px;border:1px solid transparent;transition:all .45s var(--ease);position:relative;overflow:hidden}
.feat button::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;background:var(--grad);transform:scaleX(0);transform-origin:0 50%}
.feat.active button{border-color:var(--line-2);background:var(--glass-bg);box-shadow:var(--glass-shadow)}
.feat.active button::after{animation:tabprog 5s linear forwards}
.demo.paused .feat.active button::after{animation-play-state:paused}
.feat button:hover{border-color:var(--line-2)}
.feat-ic{width:46px;height:46px;flex-shrink:0;border-radius:14px;display:grid;place-items:center;border:1px solid var(--line-2);color:var(--txt-2);transition:all .4s}
.feat-ic svg{width:22px;height:22px}
.feat.active .feat-ic{color:var(--accent-ink);border-color:color-mix(in srgb,var(--accent) 45%,transparent);background:color-mix(in srgb,var(--accent) 10%,transparent)}
.feat-t b{display:block;font-size:17.5px;letter-spacing:.06em;margin-bottom:2px}
.feat-t em{font-style:normal;font-size:14px;color:var(--txt-2);line-height:1.75;display:block}
.demo-stage{position:relative;display:grid;place-items:center;padding:20px 0}
.demo-stage::before{content:"";position:absolute;width:min(520px,100vw);height:min(520px,100vw);border-radius:50%;background:radial-gradient(circle,color-mix(in srgb,var(--accent) 22%,transparent),transparent 65%);filter:blur(10px)}
.phone{position:relative;width:300px;aspect-ratio:9/18.6;border-radius:44px;padding:10px;background:var(--phone-frame);box-shadow:0 0 0 1px rgba(255,255,255,.08) inset,0 40px 80px -30px rgba(0,0,0,.55),0 0 0 6px color-mix(in srgb,var(--txt) 6%,transparent)}
.phone::before{content:"";position:absolute;top:18px;left:50%;transform:translateX(-50%);width:84px;height:22px;border-radius:12px;background:#000;z-index:5}
.phone-screen{position:relative;width:100%;height:100%;border-radius:34px;overflow:hidden;background:#cfd9d8}
.phone-poster,.phone-video{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;object-fit:cover;object-position:50% 20%}
.phone-video{opacity:0;transition:opacity .8s}
.phone-video.ready{opacity:1}
.ps-top{position:absolute;top:50px;left:12px;right:12px;display:flex;align-items:center;gap:8px;z-index:3}
.ps-avatar{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:700;color:#1a1205;background:linear-gradient(135deg,#fbe9bd,#c7964a);flex-shrink:0}
.ps-name{display:flex;flex-direction:column;line-height:1.25;padding:3px 10px 3px 4px;border-radius:999px;background:rgba(0,0,0,.35);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);color:#fff}
.ps-name b{font-size:11.5px}.ps-name em{font-style:normal;font-size:9.5px;opacity:.8}
.ps-live{margin-left:auto;display:flex;align-items:center;gap:5px;font-size:10.5px;color:#fff;padding:3px 9px;border-radius:999px;background:linear-gradient(90deg,#e8204f,#f2552f)}
.ps-live i{width:5px;height:5px;border-radius:50%;background:#fff;animation:blink 1.2s infinite}
.ps-ai{position:absolute;top:92px;left:12px;z-index:3;font-size:10px;letter-spacing:.08em;color:#fff;padding:2px 8px;border-radius:6px;background:rgba(10,140,170,.75)}
.ps-chat{position:absolute;left:10px;right:56px;bottom:84px;height:190px;display:flex;flex-direction:column;justify-content:flex-end;gap:6px;z-index:3;-webkit-mask-image:linear-gradient(180deg,transparent,#000 30%);mask-image:linear-gradient(180deg,transparent,#000 30%);overflow:hidden}
.msg{align-self:flex-start;max-width:100%;font-size:11.5px;line-height:1.5;color:#fff;padding:5px 10px;border-radius:12px;background:rgba(0,0,0,.42);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);animation:msgIn .5s var(--ease) both}
.msg b{color:#ffd88a;font-weight:600;margin-right:4px}
.msg.ai{background:linear-gradient(120deg,rgba(10,150,180,.9),rgba(42,107,255,.85))}
.msg.ai b{color:#fff}
@keyframes msgIn{from{opacity:0;transform:translateY(12px) scale(.96)}to{opacity:1;transform:none}}
.ps-product{position:absolute;left:10px;right:10px;bottom:14px;z-index:3;display:flex;align-items:center;gap:10px;padding:8px;border-radius:14px;background:rgba(255,255,255,.94);box-shadow:0 10px 30px -10px rgba(0,0,0,.4);color:#111;transition:transform .5s var(--ease),box-shadow .5s}
.ps-product.pulse{animation:pp 1.2s var(--ease)}
@keyframes pp{30%{transform:translateY(-6px) scale(1.03);box-shadow:0 0 0 3px rgba(10,163,191,.5),0 16px 30px -10px rgba(0,0,0,.4)}}
.pp-thumb{width:42px;height:42px;border-radius:10px;background:url(../img/live_vertical.webp) 82% 63%/360% auto;flex-shrink:0}
.pp-info{display:flex;flex-direction:column;line-height:1.35;min-width:0}
.pp-info b{font-size:12.5px}.pp-info em{font-style:normal;font-size:10.5px;color:#7a6a4a}
.pp-btn{margin-left:auto;font-size:11.5px;font-weight:600;color:#fff;padding:6px 12px;border-radius:999px;background:linear-gradient(90deg,#f2552f,#e8204f)}
.demo-float{position:absolute;border-radius:18px;padding:16px 18px;width:214px;z-index:4;transition:transform .6s var(--ease),opacity .6s,box-shadow .6s}
.df-script{left:-24px;top:12%}
.df-stats{right:-24px;bottom:12%}
.demo-float.on{transform:scale(1.04);box-shadow:var(--glass-shadow),0 0 0 1px color-mix(in srgb,var(--accent) 45%,transparent)}
.df-h{display:flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;letter-spacing:.08em;color:var(--txt-2);margin-bottom:8px}
.df-h em{font-style:normal;font-weight:400;font-size:11px;color:var(--gold-ink);border:1px dashed color-mix(in srgb,var(--gold) 60%,transparent);border-radius:999px;padding:0 7px}
.spark{width:8px;height:8px;border-radius:50%;background:var(--accent);animation:pulse 1.6s infinite}
.df-type{font-size:13px;line-height:1.7;color:var(--txt);min-height:66px}
.df-type::after{content:"";display:inline-block;width:2px;height:1em;margin-left:2px;vertical-align:-2px;background:var(--accent);animation:blink 1s infinite}
.df-bars{display:flex;align-items:flex-end;gap:6px;height:56px}
.df-bars i{flex:1;height:var(--h);border-radius:4px 4px 2px 2px;background:var(--grad);opacity:.85;transform-origin:bottom;animation:barUp 2.4s var(--ease) infinite alternate}
.df-bars i:nth-child(2n){animation-delay:-.6s}.df-bars i:nth-child(3n){animation-delay:-1.2s}
@keyframes barUp{from{transform:scaleY(.6)}to{transform:scaleY(1)}}
.df-kpi{display:flex;justify-content:space-between;margin-top:10px;font-size:12.5px;color:var(--txt-2)}
.df-kpi b{color:var(--accent-ink)}

/* advantages */
.advantages{overflow:hidden}
.adv-bg{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--adv-img) center right/cover no-repeat;opacity:var(--adv-op);-webkit-mask-image:linear-gradient(180deg,transparent,#000 20%,#000 80%,transparent);mask-image:linear-gradient(180deg,transparent,#000 20%,#000 80%,transparent)}
.adv-inner{position:relative;display:grid;grid-template-columns:1fr 1.25fr;gap:60px;align-items:center}
.adv-meters{display:grid;gap:22px}
.meter-top{display:flex;justify-content:space-between;font-size:14.5px;color:var(--txt-2);margin-bottom:10px}
.meter-top b{color:var(--gold-ink);font-weight:600}
.bar{height:4px;border-radius:4px;background:color-mix(in srgb,var(--txt) 9%,transparent);overflow:hidden}
.bar i{display:block;height:100%;width:var(--w);border-radius:inherit;background:var(--grad);box-shadow:0 0 12px var(--accent);transition:width 1.8s var(--ease) .3s}
.js .adv-meters:not(.in) .bar i{width:0}
.adv-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.adv-item{border-radius:20px;padding:28px 26px;transition:transform .5s var(--ease),border-color .4s,box-shadow .5s}
.adv-item:hover{transform:translateY(-6px);border-color:color-mix(in srgb,var(--accent) 45%,transparent);box-shadow:var(--card-shadow-hover)}
.adv-ic{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;background:color-mix(in srgb,var(--accent) 9%,transparent);border:1px solid color-mix(in srgb,var(--accent) 28%,transparent);margin-bottom:18px;color:var(--accent-ink)}
.adv-ic svg{width:28px;height:28px}
.adv-item h3{font-size:18px;letter-spacing:.06em;margin-bottom:8px}
.adv-item p{font-size:14px;color:var(--txt-2);line-height:1.8}

/* gallery */
.gallery{padding-bottom:110px}
.gallery-rail{display:grid;grid-auto-flow:column;grid-auto-columns:clamp(240px,22vw,320px);gap:22px;overflow-x:auto;scroll-snap-type:x mandatory;padding:10px max(24px,calc((100vw - 1240px)/2)) 30px;scroll-padding-inline:max(24px,calc((100vw - 1240px)/2));scrollbar-width:none;cursor:grab}
.gallery-rail::-webkit-scrollbar{display:none}
.gallery-rail.drag{cursor:grabbing;scroll-snap-type:none}
.dh{position:relative;aspect-ratio:2/3;border-radius:22px;overflow:hidden;scroll-snap-align:start;border:1px solid var(--line);background:var(--surface);box-shadow:var(--card-shadow);transition:transform .6s var(--ease),box-shadow .6s,border-color .4s}
.dh img{width:100%;height:100%;object-fit:cover;transition:transform 1.2s var(--ease),filter .6s;filter:saturate(.95)}
.dh::after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(180deg,transparent 50%,rgba(5,8,15,.9))}
.dh::before{content:"";position:absolute;left:-20%;right:-20%;height:30%;top:0;transform:translateY(-100%);z-index:2;background:linear-gradient(180deg,transparent,rgba(69,230,255,.22),transparent);pointer-events:none}
.dh:hover{transform:translateY(-10px);border-color:color-mix(in srgb,var(--accent) 45%,transparent);box-shadow:var(--card-shadow-hover)}
.dh:hover img{transform:scale(1.05);filter:saturate(1.05)}
.dh:hover::before{animation:scan 1.6s var(--ease)}
@keyframes scan{to{transform:translateY(367%)}}
.dh figcaption{position:absolute;left:22px;right:22px;bottom:22px;z-index:3;display:flex;flex-direction:column;gap:2px;color:#fff}
.dh-tag{align-self:flex-start;font-size:11.5px;letter-spacing:.12em;color:#7ff0ff;border:1px solid rgba(69,230,255,.45);background:rgba(5,20,30,.45);padding:2px 10px;border-radius:999px;margin-bottom:10px;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}
.dh b{font-size:20px;letter-spacing:.1em}
.dh em{font-style:normal;font-size:13px;color:#cdd6e4;max-height:0;opacity:0;overflow:hidden;transition:max-height .5s var(--ease),opacity .5s}
.dh:hover em,.dh:focus-within em{max-height:30px;opacity:1}
.gallery-foot{display:flex;justify-content:space-between;align-items:center;gap:20px}
.rail-ctrl{display:flex;gap:12px}
.rc{width:50px;height:50px;border-radius:50%;border:1px solid var(--line-2);display:grid;place-items:center;transition:all .3s;background:var(--surface)}
.rc svg{width:20px;height:20px;stroke-width:2}
.rc:hover{border-color:var(--accent);color:var(--accent-ink)}

/* scenes */
.scene-wrap{display:grid;grid-template-columns:260px 1fr;gap:28px}
.scene-tabs{display:flex;flex-direction:column;gap:10px}
.scene-tab{position:relative;display:flex;align-items:center;gap:16px;text-align:left;padding:22px 24px;border-radius:16px;border:1px solid var(--line);font-size:17px;font-weight:600;letter-spacing:.06em;color:var(--txt-2);transition:all .4s var(--ease);overflow:hidden;background:transparent}
.scene-tab span{font-family:var(--en);font-size:12px;color:var(--txt-3);letter-spacing:.14em;transition:color .3s}
.scene-tab::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;background:var(--grad);transform:scaleX(0);transform-origin:0 50%}
.scene-tab.active::after{animation:tabprog 6s linear forwards}
.scene-wrap.paused .scene-tab.active::after{animation-play-state:paused}
@keyframes tabprog{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.scene-tab:hover{color:var(--txt);border-color:var(--line-2)}
.scene-tab.active{color:var(--txt);border-color:color-mix(in srgb,var(--accent) 40%,transparent);background:linear-gradient(100deg,color-mix(in srgb,var(--accent) 12%,transparent),transparent);box-shadow:var(--card-shadow)}
.scene-tab.active span{color:var(--gold-ink)}
.scene-stage{position:relative;aspect-ratio:16/9;border-radius:24px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--card-shadow)}
.scene-pane{position:absolute;top:0;right:0;bottom:0;left:0;opacity:0;visibility:hidden;transition:opacity .9s var(--ease),visibility .9s}
.scene-pane.active{opacity:1;visibility:visible}
.scene-pane img{width:100%;height:100%;object-fit:cover;transform:scale(1.08);transition:transform 7s linear}
.scene-pane.active img{transform:scale(1)}
.scene-info{position:absolute;right:26px;bottom:26px;width:min(380px,calc(100% - 52px));z-index:2;border-radius:20px;padding:28px;transform:translateY(20px);opacity:0;transition:transform .8s var(--ease) .25s,opacity .8s .25s;background:var(--scene-glass)}
.scene-pane.active .scene-info{transform:none;opacity:1}
.scene-info h3{font-size:24px;letter-spacing:.08em;margin-bottom:10px}
.scene-info p{font-size:14.5px;color:var(--txt-2);line-height:1.85}
.scene-info ul{margin-top:16px;display:grid;gap:8px}
.scene-info li{display:flex;align-items:center;gap:10px;font-size:14px}
.scene-info li::before{content:"";width:16px;height:16px;flex-shrink:0;border-radius:50%;background:radial-gradient(circle,var(--gold) 0 3px,transparent 4px),color-mix(in srgb,var(--gold) 15%,transparent);border:1px solid color-mix(in srgb,var(--gold) 55%,transparent)}

/* cases */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case{border-radius:22px;padding:32px 30px;display:flex;flex-direction:column;transition:transform .5s var(--ease),box-shadow .5s,border-color .4s;position:relative;overflow:hidden}
.case::before{content:"";position:absolute;top:0;left:30px;right:30px;height:2px;background:var(--grad-gold);opacity:.7}
.case:hover{transform:translateY(-6px);box-shadow:var(--card-shadow-hover);border-color:color-mix(in srgb,var(--gold) 45%,transparent)}
.case header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.case-ind{font-size:13px;letter-spacing:.12em;color:var(--accent-ink)}
.case-tag{font-size:11.5px;color:var(--gold-ink);border:1px dashed color-mix(in srgb,var(--gold) 60%,transparent);border-radius:999px;padding:1px 10px}
.case h3{font-size:21px;line-height:1.45;letter-spacing:.04em;margin-bottom:20px}
.case dl{display:grid;gap:14px}
.case dl div{display:grid;grid-template-columns:44px 1fr;gap:10px;padding-top:14px;border-top:1px solid var(--line)}
.case dt{font-size:13px;font-weight:600;color:var(--gold-ink);letter-spacing:.1em}
.case dd{font-size:14px;color:var(--txt-2);line-height:1.8}

/* process */
.process{background:radial-gradient(800px 400px at 50% 0%,var(--ambient-1),transparent 70%)}
.steps{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:24px}
.steps::before{content:"";position:absolute;left:10%;right:10%;top:86px;height:1px;background:linear-gradient(90deg,transparent,var(--line-2) 10%,var(--line-2) 90%,transparent)}
.steps::after{content:"";position:absolute;left:10%;top:86px;height:1px;background:var(--grad);width:80%;box-shadow:0 0 10px var(--accent);transition:width 2.4s var(--ease) .3s}
.js .steps:not(.in)::after{width:0}
.step{position:relative;text-align:center;padding:0 6px}
.step-no{font-family:var(--en);font-size:52px;font-weight:800;line-height:1;color:transparent;-webkit-text-stroke:1px var(--stroke-step);margin-bottom:22px;transition:all .4s}
.step-dot{width:14px;height:14px;margin:0 auto 26px;border-radius:50%;background:var(--bg);border:2px solid var(--accent);box-shadow:0 0 0 6px color-mix(in srgb,var(--accent) 10%,transparent),0 0 18px color-mix(in srgb,var(--accent) 55%,transparent);position:relative;z-index:1;transition:transform .4s var(--ease)}
.step:hover .step-dot{transform:scale(1.4)}
.step:hover .step-no{-webkit-text-stroke-color:var(--gold);color:color-mix(in srgb,var(--gold) 14%,transparent)}
.step h3{font-size:19px;letter-spacing:.08em;margin-bottom:8px}
.step p{font-size:14px;color:var(--txt-2);line-height:1.8}

/* stats */
.stats{padding-top:20px}
.stats-panel{border-radius:28px;padding:48px 56px 36px;position:relative;overflow:hidden}
.stats-panel::before{content:"";position:absolute;width:420px;height:420px;right:-120px;top:-200px;background:radial-gradient(circle,color-mix(in srgb,var(--gold) 20%,transparent),transparent 65%)}
.stats-head{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;margin-bottom:36px}
.stats-head h2{font-size:24px;letter-spacing:.1em}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:8px 28px;border-left:1px solid var(--line)}
.stat:first-child{border-left:0;padding-left:0}
.stat b{display:flex;align-items:baseline;gap:4px;font-family:var(--en);font-size:clamp(40px,4.4vw,62px);font-weight:800;line-height:1.1;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-variant-numeric:tabular-nums}
.stat b small{font-size:.45em;font-weight:700}
.stat>span{display:block;margin-top:8px;font-size:14px;color:var(--txt-2)}
.stats-panel .note{margin-top:28px}

/* faq */
.faq-inner{display:grid;grid-template-columns:.8fr 1.2fr;gap:72px;align-items:start}
.faq-cta{margin-top:30px}
.faq-list{display:grid;gap:14px}
.qa{border-radius:18px;border:1px solid var(--line);background:var(--card-bg);box-shadow:var(--card-shadow);transition:border-color .4s,box-shadow .4s}
.qa[open]{border-color:color-mix(in srgb,var(--accent) 35%,transparent)}
.qa summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 26px;font-size:17px;font-weight:600;letter-spacing:.04em;border-radius:18px}
.qa summary::-webkit-details-marker{display:none}
.qa summary i{position:relative;width:28px;height:28px;flex-shrink:0;border-radius:50%;border:1px solid var(--line-2);transition:transform .45s var(--ease),border-color .3s,background .3s}
.qa summary i::before,.qa summary i::after{content:"";position:absolute;left:50%;top:50%;width:11px;height:1.6px;background:currentColor;transform:translate(-50%,-50%);border-radius:2px;transition:transform .45s var(--ease)}
.qa summary i::after{transform:translate(-50%,-50%) rotate(90deg)}
.qa[open] summary i{transform:rotate(180deg);border-color:var(--accent);background:color-mix(in srgb,var(--accent) 10%,transparent);color:var(--txt)}
.qa[open] summary i::after{transform:translate(-50%,-50%) rotate(0)}
.qa summary:hover{color:var(--accent-ink)}
.qa-a{padding:0 26px 22px;overflow:hidden}
.qa-a p{font-size:15px;color:var(--txt-2);line-height:1.9}

/* contact */
.contact{overflow:hidden;padding-bottom:150px}
.contact-bg{position:absolute;top:0;right:0;bottom:0;left:0;z-index:0;background:var(--cta-img) center/cover no-repeat;opacity:var(--cta-op);-webkit-mask-image:linear-gradient(180deg,transparent,#000 25%,#000 75%,transparent);mask-image:linear-gradient(180deg,transparent,#000 25%,#000 75%,transparent)}
.contact::before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;z-index:1;background:var(--cta-shade)}
.contact-inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.contact-list{margin-top:40px;display:grid;gap:18px}
.contact-list li{display:flex;align-items:center;gap:16px}
.ci{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;border:1px solid color-mix(in srgb,var(--gold) 45%,transparent);background:color-mix(in srgb,var(--gold) 9%,transparent);color:var(--gold-ink);flex-shrink:0}
.ci svg{width:22px;height:22px}
.contact-list em{display:block;font-style:normal;font-size:12.5px;color:var(--txt-3);letter-spacing:.1em}
.contact-list b{font-weight:600;font-size:16px;letter-spacing:.04em}
.contact-form{border-radius:28px;padding:44px 40px;display:grid;gap:18px}
.contact-form h3{font-size:24px;letter-spacing:.12em;margin-bottom:6px}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{position:relative;display:block}
.field input,.field textarea{width:100%;font:inherit;font-size:15px;color:var(--txt);background:var(--field-bg);border:1px solid var(--line-2);border-radius:14px;padding:24px 16px 8px;outline:none;transition:border-color .3s,background .3s,box-shadow .3s;resize:vertical}
.field textarea{min-height:100px}
.field span{position:absolute;left:17px;top:16px;font-size:14.5px;color:var(--txt-3);pointer-events:none;transition:all .25s var(--ease)}
.field input:focus,.field textarea:focus{border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 14%,transparent)}
.field input:focus+span,.field input:not(:placeholder-shown)+span,.field textarea:focus+span,.field textarea:not(:placeholder-shown)+span{top:6px;font-size:11.5px;color:var(--accent-ink);letter-spacing:.06em}
.field.err input{border-color:var(--danger);box-shadow:0 0 0 4px rgba(229,72,77,.12)}
.field.err span{color:var(--danger)!important}
.f-err{font-size:12.5px;color:var(--danger);margin:-10px 0 -6px 4px;min-height:0}
.f-err:empty{display:none}
.interest{border:0;display:flex;flex-wrap:wrap;gap:10px}
.interest legend{font-size:13px;color:var(--txt-3);margin-bottom:10px;letter-spacing:.06em}
.interest label{cursor:pointer;position:relative}
.interest input{position:absolute;opacity:0;width:1px;height:1px}
.interest span{display:inline-block;padding:7px 16px;border-radius:999px;font-size:13.5px;border:1px solid var(--line-2);color:var(--txt-2);background:var(--field-bg);transition:all .3s}
.interest label:hover span{border-color:color-mix(in srgb,var(--accent) 55%,transparent);color:var(--txt)}
.interest input:checked+span{border-color:transparent;color:var(--btn-gold-txt);background:var(--grad-gold);font-weight:600}
.interest input:focus-visible+span{outline:2px solid var(--accent);outline-offset:2px}
.form-tip{font-size:12px;color:var(--txt-3);text-align:center}

/* footer */
.site-footer{border-top:1px solid var(--line);background:var(--footer-bg);padding:72px 0 30px}
.ft-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:40px;padding-bottom:48px;border-bottom:1px solid var(--line)}
.ft-brand p{margin-top:18px;font-size:14px;color:var(--txt-3);line-height:1.9}
.ft-col{display:flex;flex-direction:column;gap:10px;font-size:14px;color:var(--txt-2)}
.ft-col h2{font-size:15px;color:var(--txt);letter-spacing:.12em;margin-bottom:8px}
.ft-col a{transition:color .3s,transform .3s;align-self:flex-start}
.ft-col a:hover{color:var(--accent-ink);transform:translateX(4px)}
.qr-ph{margin-top:8px;width:96px;height:96px;border-radius:12px;border:1px dashed var(--line-2);display:grid;place-items:center;text-align:center;font-size:11px;line-height:1.5;color:var(--txt-3)}
.ft-bottom .ai-note{flex-basis:100%;font-size:12px}
.ft-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-top:26px;font-size:13px;color:var(--txt-3)}

.to-top{position:fixed;right:26px;bottom:26px;z-index:80;width:50px;height:50px;border-radius:50%;display:grid;place-items:center;background:var(--glass-bg);border:1px solid var(--line-2);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:var(--glass-shadow);opacity:0;transform:translateY(20px);transition:all .4s var(--ease);pointer-events:none}
.to-top svg{width:20px;height:20px;stroke-width:2}
.to-top.show{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{border-color:var(--accent);color:var(--accent-ink)}
.toast{position:fixed;left:50%;bottom:40px;z-index:200;transform:translate(-50%,30px);opacity:0;pointer-events:none;padding:14px 26px;border-radius:14px;font-size:14.5px;background:var(--surface);color:var(--txt);border:1px solid color-mix(in srgb,var(--accent) 40%,transparent);box-shadow:0 20px 50px -10px rgba(0,0,0,.35);transition:all .45s var(--ease);width:max-content;max-width:calc(100vw - 40px);text-align:center}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* reveal */
.reveal{transition:opacity 1s var(--ease),transform 1s var(--ease);transition-delay:calc(var(--d,0) * .1s)}
.js .reveal{opacity:0;transform:translateY(36px)}
.js .reveal.in{opacity:1;transform:none}
[data-delay="1"]{--d:1}[data-delay="2"]{--d:2}[data-delay="3"]{--d:3}[data-delay="4"]{--d:4}[data-delay="5"]{--d:5}

/* ===================== responsive ===================== */
@media (max-width:1200px){.main-nav a{padding:8px 9px;font-size:14px}.main-nav a:hover::after,.main-nav a.active::after{left:9px;right:9px}}
@media (max-width:1100px){
  .hero-card{display:none}
  .adv-inner{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(3,1fr);row-gap:50px}
  .steps::before,.steps::after{display:none}
  .demo-inner{gap:40px}
  .case-grid{grid-template-columns:1fr 1fr}
  .df-script{left:0}.df-stats{right:0}
}
@media (max-width:960px){
  .main-nav,.nav-cta{display:none}
  .nav-toggle{display:block}
  .nav-actions{margin-left:auto;gap:8px}
  .section{padding:96px 0}
  .svc-grid{grid-template-columns:1fr}
  .demo-inner{grid-template-columns:1fr}
  .scene-wrap{grid-template-columns:1fr}
  .scene-tabs{flex-direction:row;overflow-x:auto;scrollbar-width:none;gap:8px;margin-inline:-20px;padding-inline:20px}
  .scene-tabs::-webkit-scrollbar{display:none}
  .scene-tab{flex-shrink:0;padding:12px 18px;font-size:15px}
  .faq-inner{grid-template-columns:1fr;gap:10px}
  .contact-inner{grid-template-columns:1fr;gap:48px}
  .stats-grid{grid-template-columns:repeat(2,1fr);row-gap:30px}
  .stat:nth-child(3){border-left:0;padding-left:0}
  .ft-top{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  body{font-size:15px}
  html{scroll-padding-top:64px}
  .container{width:calc(100% - 40px);width:calc(100% - 2 * max(20px,env(safe-area-inset-left),env(safe-area-inset-right)))}
  .nav-wrap{height:64px}
  .scrolled .nav-wrap{height:60px}
  .brand-mark{width:32px;height:32px}
  .brand-text strong{font-size:17px}
  .theme-toggle{width:56px;height:30px}
  .tt-knob{width:22px;height:22px;left:30px}
  [data-theme="light"] .tt-knob{left:3px}
  .hero{align-items:flex-end}
  .hero-poster{background-image:var(--poster-m);background-position:64% 20%}
  .hero-video{object-position:64% 20%}
  .hero-shade{background:var(--hero-shade-m)}
  .hero-inner{padding:0 0 84px}
  .eyebrow{font-size:10.5px;letter-spacing:.16em;padding:6px 12px}
  .hero-title{font-size:clamp(34px,10vw,44px);margin:18px 0 14px}
  .hero-sub{font-size:14.5px;line-height:1.85}
  .hero-actions{margin-top:26px;gap:12px;flex-wrap:nowrap}
  .hero-actions .btn{flex:1;--h:48px;padding:0 14px;font-size:14.5px}
  .hero-tags{margin-top:22px;gap:6px 18px;font-size:12.5px}
  .scroll-cue{display:none}
  .marquee{padding:14px 0}.marquee-track{font-size:14px}
  .section{padding:80px 0}
  .section-head{margin-bottom:40px;text-align:left}
  .lead{font-size:15px}
  .sample-badge.inline{margin:10px 0 0;display:inline-block}
  .svc-body{padding:0 22px 28px}
  .svc-body h3{font-size:22px}
  .svc-no{font-size:42px}
  .svc-play{display:none}
  .feat button{padding:16px}
  .demo-stage{padding:10px 0 0}
  .phone{width:min(280px,76vw)}
  .demo-float{display:none}
  .adv-bg{background-image:var(--adv-img-m);opacity:calc(var(--adv-op) * .5)}
  .adv-grid{grid-template-columns:1fr}
  .adv-item{padding:22px}
  .gallery-rail{grid-auto-columns:72vw;padding-inline:20px;scroll-padding-inline:20px;gap:14px}
  .dh em{max-height:30px;opacity:1}
  .rail-ctrl{display:none}
  .scene-stage{aspect-ratio:auto;display:grid;background:var(--surface)}
  .scene-pane{position:relative;grid-area:1/1}
  .scene-pane img{aspect-ratio:4/3;height:auto}
  .scene-info{position:relative;right:auto;bottom:auto;width:100%;border-radius:0;border:0;border-top:1px solid var(--line);padding:22px;box-shadow:none;-webkit-backdrop-filter:none;backdrop-filter:none;background:var(--surface)}
  .case-grid{grid-template-columns:1fr}
  .case{padding:26px 22px}
  .steps{grid-template-columns:1fr;row-gap:0;padding-left:8px}
  .step{display:grid;grid-template-columns:56px 1fr;text-align:left;column-gap:14px;padding:0 0 30px 24px;border-left:1px solid var(--line-2);margin-left:6px}
  .step-dot{position:absolute;left:-8px;top:6px;margin:0}
  .step-no{grid-row:1/3;font-size:36px;margin:0}
  .step h3{font-size:17px;margin:2px 0 4px}
  .stats-panel{padding:32px 22px 26px}
  .stat{padding:4px 14px}
  .stat:nth-child(odd){border-left:0;padding-left:0}
  .qa summary{padding:18px 20px;font-size:15.5px}
  .qa-a{padding:0 20px 18px}
  .contact-bg{background-image:var(--cta-img-m)}
  .contact::before{background:color-mix(in srgb,var(--bg) 80%,transparent)}
  .contact-form{padding:30px 22px}
  .f-row{grid-template-columns:1fr}
  .ft-top{grid-template-columns:1fr 1fr;gap:32px}
  .ft-brand{grid-column:1/-1}
  .ft-bottom{flex-direction:column}
  .to-top{right:16px;bottom:calc(16px + env(safe-area-inset-bottom));width:44px;height:44px}
}
@media (hover:none){.svc-play{display:none}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  .js .hero-title .ln>span{transform:none}
}
@media print{.site-header,.hero-media,.page-loader,.to-top,.marquee{display:none}body{background:#fff;color:#000}}

/* 隐私政策勾选 */
.agree-wrap{display:grid;gap:6px}
.agree-wrap .f-err{margin:0 0 0 30px}
.agree{position:relative;display:flex;align-items:flex-start;gap:10px;font-size:13.5px;color:var(--txt-2);cursor:pointer;line-height:1.6}
.agree input{position:absolute;left:0;top:2px;width:20px;height:20px;margin:0;opacity:0;cursor:pointer}
.agree-box{position:relative;flex-shrink:0;width:20px;height:20px;margin-top:1px;border-radius:6px;border:1.5px solid var(--line-2);background:var(--field-bg);transition:background .25s,border-color .25s}
.agree-box::after{content:"";position:absolute;left:6px;top:2px;width:5px;height:10px;border:solid var(--btn-gold-txt);border-width:0 2px 2px 0;transform:rotate(45deg) scale(0);transition:transform .2s var(--ease)}
.agree input:checked+.agree-box{background:var(--grad-gold);border-color:transparent}
.agree input:checked+.agree-box::after{transform:rotate(45deg) scale(1)}
.agree input:focus-visible+.agree-box{outline:2px solid var(--accent);outline-offset:2px}
.agree:hover .agree-box{border-color:var(--accent)}
.agree.err .agree-box{border-color:var(--danger);box-shadow:0 0 0 4px rgba(229,72,77,.12)}
.agree a{color:var(--gold-ink);font-weight:600;text-decoration:underline;text-underline-offset:3px}
.ft-links{display:inline-flex;gap:20px;flex-wrap:wrap}
.ft-links a{color:var(--txt-2);text-decoration:underline;text-underline-offset:3px}
.ft-links a:hover{color:var(--accent-ink)}

/* 隐私政策页 */
.legal-page .site-header{background:var(--header-bg);-webkit-backdrop-filter:blur(18px) saturate(160%);backdrop-filter:blur(18px) saturate(160%);border-color:var(--line)}
.legal-page .nav-actions{margin-left:auto}
.legal{position:relative;padding:150px 0 110px}
.legal-inner{display:grid;grid-template-columns:240px 1fr;gap:64px;align-items:start}
.legal-head{grid-column:1/-1;max-width:820px}
.legal-head h1{font-size:clamp(32px,4vw,48px);font-weight:800;letter-spacing:.06em;line-height:1.3;margin-bottom:14px}
.legal-meta{display:flex;flex-wrap:wrap;gap:8px 22px;font-size:14px;color:var(--txt-3)}
.legal-notice{margin-top:26px;padding:16px 20px;border-radius:14px;border:1px dashed color-mix(in srgb,var(--gold) 65%,transparent);background:color-mix(in srgb,var(--gold) 8%,transparent);color:var(--gold-ink);font-size:14.5px;font-weight:600;letter-spacing:.04em}
.legal-toc{position:sticky;top:100px;border-radius:18px;padding:22px 20px}
.legal-toc h2{font-size:13px;letter-spacing:.2em;color:var(--txt-3);margin-bottom:10px;font-weight:600}
.legal-toc ol{display:grid;gap:2px;counter-reset:toc}
.legal-toc a{display:block;padding:6px 10px;border-radius:8px;font-size:14px;color:var(--txt-2);transition:color .3s,background .3s}
.legal-toc a:hover{color:var(--accent-ink);background:color-mix(in srgb,var(--accent) 8%,transparent)}
.legal-body{max-width:820px}
.legal-body section{padding:30px 0;border-top:1px solid var(--line)}
.legal-body section:first-child{border-top:0;padding-top:0}
.legal-body h2{font-size:22px;letter-spacing:.06em;margin-bottom:14px;display:flex;align-items:baseline;gap:12px}
.legal-body h2 span{font-family:var(--en);font-size:13px;color:var(--gold-ink);letter-spacing:.1em}
.legal-body h3{font-size:16.5px;margin:18px 0 6px;letter-spacing:.04em}
.legal-body p,.legal-body li{font-size:15.5px;color:var(--txt-2);line-height:1.95}
.legal-body p+p{margin-top:10px}
.legal-body ul{margin:8px 0 4px;display:grid;gap:6px}
.legal-body ul li{position:relative;padding-left:20px}
.legal-body ul li::before{content:"";position:absolute;left:4px;top:.85em;width:6px;height:6px;border-radius:50%;background:var(--gold)}
.legal-body strong{color:var(--txt);font-weight:600}
.legal-table{width:100%;border-collapse:collapse;margin:10px 0 4px;font-size:14.5px}
.legal-table th,.legal-table td{text-align:left;padding:12px 14px;border:1px solid var(--line-2);vertical-align:top;color:var(--txt-2);line-height:1.75}
.legal-table th{color:var(--txt);background:color-mix(in srgb,var(--accent) 6%,transparent);font-weight:600;white-space:nowrap}
.legal-page .site-footer{padding:36px 0 30px}
.legal-page .ft-bottom{border:0;padding-top:0}
@media (max-width:960px){.legal-inner{grid-template-columns:1fr;gap:28px}.legal-toc{position:static}}
@media (max-width:640px){
  .legal{padding:104px 0 72px}
  .legal-back{display:none}
  .legal-body h2{font-size:19px}
  .legal-body p,.legal-body li{font-size:15px}
  .legal-table thead{display:none}
  .legal-table,.legal-table tbody,.legal-table tr,.legal-table td{display:block;width:100%}
  .legal-table tr{border:1px solid var(--line-2);border-radius:12px;margin-bottom:10px;overflow:hidden}
  .legal-table td{border:0;border-top:1px solid var(--line);padding:10px 14px}
  .legal-table td:first-child{border-top:0;color:var(--txt);font-weight:600;background:color-mix(in srgb,var(--accent) 6%,transparent)}
  .legal-table td[data-label]::before{content:attr(data-label)"：";color:var(--txt-3)}
}
.legal-body code{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-size:.9em;padding:1px 6px;border-radius:6px;background:color-mix(in srgb,var(--accent) 10%,transparent);color:var(--txt)}