/* ============ Design tokens (LIGHT) ============ */
:root{
  --bg:#F2F9F4;
  --bg-2:#FFFFFF;
  --bg-3:#EAF5EE;
  --surface:#FFFFFF;
  --surface-2:#F7FCF8;
  --border:rgba(27,140,116,.20);
  --border-soft:rgba(20,55,40,.10);
  --text:#13241C;
  --dim:#5C7066;
  --dim-2:#93A69B;
  --lime:#B9FC4B;
  --accent:#2EA34A;          /* emerald, readable on light */
  --accent-2:#1B998B;        /* teal, readable on light */
  --mint:#dafce4;
  --grad:linear-gradient(120deg,#B9FC4B 0%,#42D3BB 100%);   /* buttons, fills */
  --grad-text:linear-gradient(120deg,#1F9E55 0%,#1B8C7A 100%); /* readable gradient text */
  --radius:20px;
  --radius-sm:13px;
  --maxw:1180px;
  --shadow:0 20px 50px -22px rgba(30,80,55,.20);
  --shadow-sm:0 8px 24px -14px rgba(30,80,55,.18);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-d:"Space Grotesk","Noto Sans SC",system-ui,sans-serif;
  --font-b:"Inter","Noto Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-b);
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.grad{
  background:var(--grad-text);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
  color:transparent;
}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-d);font-weight:600;font-size:15px;
  padding:14px 26px;border-radius:999px;cursor:pointer;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),background .3s,border-color .3s,color .3s;
  border:1px solid transparent;white-space:nowrap;
}
.btn--accent{background:linear-gradient(135deg,#1B998B 0%,#42D3BB 100%);color:#fff;box-shadow:0 12px 28px -14px rgba(20,55,40,.30)}
.btn--accent:hover{transform:translateY(-3px);box-shadow:0 18px 38px -16px rgba(20,55,40,.34)}
.btn--ghost{background:#fff;color:var(--text);border-color:var(--border)}
.btn--ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-3px);box-shadow:var(--shadow-sm)}
.btn--sm{padding:10px 20px;font-size:14px}
.btn--lg{padding:17px 34px;font-size:16px}
.btn--xs{padding:8px 14px;font-size:13px}

/* ============ Nav ============ */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:background .4s,border-color .4s,box-shadow .4s,backdrop-filter .4s}
.nav.scrolled{background:rgba(255,255,255,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--border-soft);box-shadow:0 4px 20px -12px rgba(30,80,55,.18)}
.nav__inner{max-width:var(--maxw);margin:0 auto;padding:16px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand__logo{height:40px;width:auto}
.nav__links{display:flex;gap:30px;font-size:15px;color:var(--dim);font-weight:500}
.nav__links a{position:relative;transition:color .3s}
.nav__links a:hover{color:var(--text)}
.nav__links a::after{content:"";position:absolute;left:0;bottom:-6px;height:2px;width:0;background:var(--grad);transition:width .3s var(--ease)}
.nav__links a:hover::after{width:100%}

/* ============ Hero ============ */
.hero{position:relative;padding:160px 0 60px;overflow:hidden}
.hero__bg{position:absolute;inset:0;background:
  radial-gradient(900px 600px at 80% 8%,rgba(185,252,75,.40),transparent 60%),
  radial-gradient(820px 620px at 6% 70%,rgba(66,211,187,.26),transparent 58%),
  linear-gradient(180deg,#F2F9F4,#EAF7EF 60%,#F2F9F4);}
.hero__grid{position:absolute;inset:0;background-image:
  linear-gradient(rgba(27,120,90,.06) 1px,transparent 1px),
  linear-gradient(90deg,rgba(27,120,90,.06) 1px,transparent 1px);
  background-size:54px 54px;mask-image:radial-gradient(circle at 62% 28%,#000,transparent 72%);-webkit-mask-image:radial-gradient(circle at 62% 28%,#000,transparent 72%);}
.hero__inner{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-d);font-size:13px;letter-spacing:.5px;
  color:var(--accent-2);background:rgba(66,211,187,.12);border:1px solid var(--border);padding:7px 14px;border-radius:999px;font-weight:600}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--accent-2);box-shadow:0 0 12px var(--accent-2)}
.hero__title{font-family:var(--font-d);font-weight:700;font-size:clamp(40px,6vw,68px);line-height:1.05;margin:22px 0 18px;letter-spacing:-1px;color:var(--text)}
.hero__sub{color:var(--dim);font-size:17px;max-width:520px}
.hero__cta{display:flex;gap:14px;margin:30px 0 24px;flex-wrap:wrap}
.hero__pills{display:flex;gap:10px;flex-wrap:wrap}
.pill{font-size:13px;color:var(--accent-2);background:#fff;border:1px solid var(--border);padding:7px 14px;border-radius:999px;box-shadow:var(--shadow-sm)}

/* hero visual — ride panel */
.hero__visual{position:relative;display:flex;align-items:center;justify-content:center}
.glow{position:absolute;width:90%;height:90%;border-radius:50%;background:radial-gradient(circle,rgba(185,252,75,.45),transparent 65%);filter:blur(10px);z-index:0}
.panel{position:relative;z-index:1;width:100%;max-width:460px;background:rgba(255,255,255,.86);backdrop-filter:blur(16px);
  border:1px solid var(--border);border-radius:24px;padding:22px;box-shadow:var(--shadow)}
.panel__top{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.panel__tag{display:inline-flex;align-items:center;gap:7px;font-family:var(--font-d);font-size:13px;font-weight:600;color:var(--accent-2)}
.live-dot{width:8px;height:8px;border-radius:50%;background:#1B998B;animation:pulse 1.6s infinite}
.panel__chip{font-size:12px;color:var(--dim);background:var(--bg-3);border-radius:999px;padding:5px 11px}
.panel__route{width:100%;height:auto}
.route-prog{stroke-dasharray:1400;stroke-dashoffset:1400;animation:draw 4.5s var(--ease) forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.marker{filter:drop-shadow(0 2px 8px rgba(185,252,75,.9));animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.5}}

.panel__stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:14px}
.pstat{background:var(--surface-2);border:1px solid var(--border-soft);border-radius:13px;padding:11px 8px;text-align:center}
.pstat__k{display:block;font-size:11px;color:var(--dim);margin-bottom:3px}
.pstat__v{font-family:var(--font-d);font-weight:700;font-size:18px;color:var(--text)}
.pstat__v small{font-size:10px;color:var(--dim);font-weight:500;margin-left:2px}

/* floating chips */
.hud{position:absolute;z-index:2;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border:1px solid var(--border);
  border-radius:14px;padding:11px 15px;display:flex;flex-direction:column;gap:2px;box-shadow:var(--shadow);animation:float 5s ease-in-out infinite}
.hud__k{font-size:11px;color:var(--dim);letter-spacing:.5px}
.hud__v{font-family:var(--font-d);font-weight:700;font-size:19px;color:var(--accent-2)}
.hud__v small{font-size:11px;color:var(--dim);font-weight:500;margin-left:3px}
.hud--hr{top:6%;left:-4%}
.hud--cad{bottom:8%;right:-3%}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}

/* stats strip */
.stats{margin-top:64px;display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--border-soft);
  border:1px solid var(--border-soft);border-radius:var(--radius);overflow:hidden;background:var(--bg-3)}
.stat{background:#fff;padding:26px 22px;text-align:center}
.stat__n{display:block;font-family:var(--font-d);font-weight:700;font-size:clamp(26px,3.4vw,38px);
  background:var(--grad-text);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat__l{display:block;margin-top:6px;color:var(--dim);font-size:14px}

/* ============ Sections ============ */
.section{padding:104px 0}
.section--alt{background:linear-gradient(180deg,#EFF8F2,#E7F4EC)}
.section__head{max-width:720px;margin:0 auto 56px;text-align:center}
.section__title{font-family:var(--font-d);font-weight:700;font-size:clamp(30px,4.4vw,46px);line-height:1.12;letter-spacing:-.5px;margin:18px 0 14px;color:var(--text)}
.section__lead{color:var(--dim);font-size:17px}

/* feature cards */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{position:relative;background:#fff;border:1px solid var(--border-soft);border-radius:var(--radius);
  padding:28px 24px;overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .4s var(--ease),border-color .4s,box-shadow .4s}
.card::before{content:"";position:absolute;inset:0;background:radial-gradient(380px 200px at var(--mx,50%) var(--my,0%),rgba(185,252,75,.20),transparent 60%);opacity:0;transition:opacity .4s}
.card:hover{transform:translateY(-7px);border-color:var(--border);box-shadow:var(--shadow)}
.card:hover::before{opacity:1}
.card__icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(185,252,75,.20),rgba(66,211,187,.14));border:1px solid var(--border);color:var(--accent-2);margin-bottom:18px}
.card__icon svg{width:26px;height:26px}
.card h3{font-family:var(--font-d);font-size:19px;margin-bottom:9px;font-weight:600;color:var(--text)}
.card p{color:var(--dim);font-size:14.5px;line-height:1.65}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{position:relative;background:#fff;border:1px solid var(--border-soft);border-radius:var(--radius);padding:30px 24px;box-shadow:var(--shadow-sm);transition:transform .4s var(--ease),border-color .4s,box-shadow .4s}
.step:hover{transform:translateY(-6px);border-color:var(--border);box-shadow:var(--shadow)}
.step__no{font-family:var(--font-d);font-weight:700;font-size:15px;color:var(--accent-2);letter-spacing:1px}
.step h3{font-family:var(--font-d);font-size:20px;margin:12px 0 10px;font-weight:600;color:var(--text)}
.step p{color:var(--dim);font-size:14.5px}

/* ============ Split sections ============ */
.split{padding:104px 0;overflow:hidden}
.split__inner{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.split--rev .split__visual{order:2}
.split__copy .section__title{text-align:left;margin-top:14px}
.split__copy .section__lead{margin-bottom:22px}
.ticks{list-style:none;display:flex;flex-direction:column;gap:13px;margin-bottom:26px}
.ticks li{position:relative;padding-left:30px;color:var(--dim);font-size:15.5px}
.ticks li::before{content:"";position:absolute;left:0;top:7px;width:18px;height:18px;border-radius:50%;
  background:rgba(185,252,75,.30);border:1px solid var(--accent)}
.ticks li::after{content:"";position:absolute;left:6px;top:12px;width:6px;height:3px;border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(-45deg)}

/* room card */
.roomcard{background:#fff;border:1px solid var(--border);
  border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);max-width:420px;width:100%}
.roomcard__top{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
.roomcard__tag{font-size:13px;color:var(--accent-2);font-weight:600}
.roomcard__live{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-d);font-size:12px;color:#E5484D;font-weight:700;letter-spacing:1px}
.live-dot{width:8px;height:8px;border-radius:50%;background:#E5484D;animation:pulse 1.4s infinite}
.roomcard__code{background:var(--bg-3);border:1px dashed var(--border);border-radius:14px;padding:16px 18px;margin-bottom:18px}
.roomcard__codelbl{display:block;font-size:12px;color:var(--dim);margin-bottom:4px}
.roomcard__codetxt{font-family:var(--font-d);font-weight:700;font-size:24px;letter-spacing:2px;color:var(--text)}
.roomcard__avatars{display:flex;gap:8px;margin-bottom:18px}
.ava{width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-family:var(--font-d);font-weight:700;color:#06140A;background:var(--c);border:2px solid #fff;box-shadow:var(--shadow-sm)}
.ava--more{background:var(--bg-3);color:var(--dim);border-color:#fff}
.roomcard__rank{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}
.rk{display:flex;align-items:center;gap:12px;background:var(--surface-2);border:1px solid var(--border-soft);border-radius:10px;padding:9px 14px;font-size:14px}
.rk span{width:22px;height:22px;border-radius:50%;background:var(--grad);color:#06140A;display:flex;align-items:center;justify-content:center;font-family:var(--font-d);font-weight:700;font-size:12px}
.rk b{font-weight:600;flex:1;color:var(--text)}
.rk i{font-style:normal;color:var(--accent-2);font-family:var(--font-d);font-weight:600}
.roomcard__invite{display:flex;align-items:center;gap:10px;justify-content:space-between;flex-wrap:wrap}
.roomcard__link{font-size:12px;color:var(--dim);background:var(--bg-3);border-radius:8px;padding:8px 10px;flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ Tech ============ */
.tech{display:grid;grid-template-columns:1fr auto 1fr;gap:30px;align-items:stretch}
.tech__col{background:#fff;border:1px solid var(--border-soft);border-radius:var(--radius);padding:32px 30px;box-shadow:var(--shadow-sm);transition:border-color .4s,transform .4s var(--ease),box-shadow .4s}
.tech__col:hover{border-color:var(--border);transform:translateY(-5px);box-shadow:var(--shadow)}
.tech__h{font-family:var(--font-d);font-size:22px;display:flex;align-items:center;gap:12px;margin-bottom:20px;font-weight:600;color:var(--text)}
.tech__badge{font-family:var(--font-d);font-size:12px;font-weight:700;padding:5px 11px;border-radius:999px;background:rgba(185,252,75,.22);color:var(--accent);border:1px solid var(--border)}
.tech__badge--2{background:rgba(66,211,187,.18);color:var(--accent-2);border-color:rgba(66,211,187,.3)}
.tech__list{list-style:none;display:flex;flex-direction:column;gap:14px}
.tech__list li{position:relative;padding-left:26px;color:var(--dim);font-size:15px}
.tech__list li::before{content:"▹";position:absolute;left:0;color:var(--accent-2);font-weight:700}
.tech__pipe{display:flex;flex-direction:column;justify-content:center;gap:14px;align-items:center}
.tech__arrow{font-family:var(--font-d);font-size:12px;color:var(--dim);background:#fff;border:1px solid var(--border-soft);
  padding:7px 12px;border-radius:999px;position:relative;box-shadow:var(--shadow-sm)}
.tech__arrow::after{content:"↓";position:absolute;left:50%;bottom:-15px;transform:translateX(-50%);color:var(--accent-2)}
.tech__arrow:last-child::after{display:none}

/* ============ Dashboard ============ */
.dash{display:grid;grid-template-columns:auto 1fr;gap:56px;align-items:center;justify-items:center}
.dash__phone{position:relative;width:280px;height:560px;background:#fff;
  border:1px solid var(--border-soft);border-radius:36px;padding:14px;box-shadow:var(--shadow)}
.dash__notch{position:absolute;top:16px;left:50%;transform:translateX(-50%);width:90px;height:7px;border-radius:999px;background:var(--bg-3)}
.dash__screen{margin-top:26px;height:calc(100% - 30px);background:linear-gradient(180deg,#F7FCF8,#EFF8F2);
  border-radius:24px;padding:18px 16px;display:flex;flex-direction:column;gap:14px}
.dash__hd{display:flex;justify-content:space-between;align-items:center;font-family:var(--font-d);font-weight:600;font-size:15px;color:var(--text)}
.dash__pill{font-size:12px;color:var(--accent);background:rgba(185,252,75,.20);padding:3px 10px;border-radius:999px}
.dash__chart{width:100%;height:120px}
.dash__line{stroke-dasharray:700;stroke-dashoffset:700;animation:draw 3s var(--ease) forwards}
.dash__stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.dash__stat{background:#fff;border:1px solid var(--border-soft);border-radius:12px;padding:12px 6px;text-align:center}
.dash__stat b{display:block;font-family:var(--font-d);font-size:22px;color:var(--text)}
.dash__stat span{font-size:11px;color:var(--dim)}
.dash__ach{display:flex;flex-wrap:wrap;gap:8px}
.ach{font-size:12px;background:rgba(66,211,187,.12);border:1px solid var(--border);color:var(--accent-2);padding:7px 11px;border-radius:999px}
.dash__copy{max-width:440px}
.dash__copy .ticks{margin-bottom:24px}

/* ============ CTA ============ */
.cta{position:relative;padding:110px 0;text-align:center;overflow:hidden}
.cta__bg{position:absolute;inset:0;background:radial-gradient(800px 400px at 50% 0,rgba(185,252,75,.40),transparent 60%),linear-gradient(180deg,#F2F9F4,#EAF7EF)}
.cta__inner{position:relative}
.cta__title{font-family:var(--font-d);font-weight:700;font-size:clamp(34px,5vw,56px);letter-spacing:-.5px;color:var(--text)}
.cta__sub{color:var(--dim);font-size:18px;margin:16px 0 32px}
.cta__btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.cta__note{margin-top:22px;font-size:13px;color:var(--dim-2)}

/* ============ Footer ============ */
.footer{border-top:1px solid var(--border-soft);padding:60px 0 30px;background:#fff}
.footer__inner{display:grid;grid-template-columns:1.4fr 2fr;gap:40px}
.footer__brand p{color:var(--dim);font-size:14px;margin-top:14px;max-width:300px}
.footer__cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer__cols h4{font-family:var(--font-d);font-size:15px;margin-bottom:14px;color:var(--text)}
.footer__cols a{display:block;color:var(--dim);font-size:14px;margin-bottom:9px;transition:color .3s}
.footer__cols a:hover{color:var(--accent-2)}
.footer__bar{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:44px;padding-top:24px;border-top:1px solid var(--border-soft);color:var(--dim-2);font-size:13px}
.footer__legal{display:flex;align-items:center;gap:10px 18px;flex-wrap:wrap}
.footer__legal > :not(:first-child)::before{content:"|";margin-right:18px;color:var(--border);pointer-events:none}
.footer__icp{color:var(--dim-2);text-decoration:none;transition:color .25s;white-space:nowrap}
.footer__icp:hover{color:var(--accent-2);text-decoration:underline}
.footer__beian-img{display:inline-block;width:15px;height:15px;object-fit:contain;vertical-align:-3px;margin-right:5px}

/* ============ Reveal animation ============ */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .route-prog,.marker,.live-dot,.hud,.dash__line{animation:none}
  .route-prog,.dash__line{stroke-dashoffset:0}
}

/* ============ Responsive ============ */
@media (max-width:980px){
  .hero__inner{grid-template-columns:1fr;gap:10px}
  .hero__visual{max-width:440px;margin:10px auto 0}
  .cards{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .split__inner{grid-template-columns:1fr;gap:36px}
  .split--rev .split__visual{order:0}
  .tech{grid-template-columns:1fr}
  .tech__pipe{flex-direction:row;flex-wrap:wrap}
  .tech__arrow::after{content:"→";right:-16px;bottom:50%;left:auto;transform:translateY(50%)}
  .dash{grid-template-columns:1fr;gap:36px}
  .footer__inner{grid-template-columns:1fr}
}
@media (max-width:620px){
  .nav__links{display:none}
  .hero{padding:120px 0 40px}
  .stats{grid-template-columns:repeat(2,1fr)}
  .cards{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .section{padding:72px 0}
  .hud__v{font-size:16px}
  .footer__cols{grid-template-columns:1fr 1fr}
  .footer__bar{flex-direction:column}
  .hud--hr{left:0}.hud--cad{right:0}
}