:root{
  --bg:#050c09; --bg2:#08130e; --ink:#eef3ee; --dim:rgba(238,243,238,.62); --line:rgba(238,243,238,.14);
  --accent:#8fd18a; --accent2:#c9f27a;
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Noto Sans CJK SC","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --en:"Helvetica Neue","Inter",Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--ink);font-family:var(--font);font-weight:300;line-height:1.7;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.wrap{width:min(1240px,100% - 48px);margin:0 auto}

/* ---------- stage ---------- */
#stage{position:fixed;inset:0;z-index:0;overflow:hidden;background:#000}
#stage .stage-poster,#stage video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
#stage video{visibility:hidden}
#stage video.is-active{visibility:visible}
.stage-shade{position:absolute;inset:0;background:
  linear-gradient(90deg,rgba(3,8,6,.78) 0%,rgba(3,8,6,.35) 45%,rgba(3,8,6,.08) 70%),
  linear-gradient(0deg,rgba(3,8,6,.7) 0%,rgba(3,8,6,0) 35%),
  linear-gradient(180deg,rgba(3,8,6,.55) 0%,rgba(3,8,6,0) 22%);
  opacity:var(--shade,1)}
.stage-grid{position:absolute;inset:0;opacity:.18;background-image:radial-gradient(rgba(255,255,255,.35) 1px,transparent 1.2px);background-size:46px 46px;mask-image:radial-gradient(ellipse at 70% 50%,#000 0%,transparent 70%);-webkit-mask-image:radial-gradient(ellipse at 70% 50%,#000 0%,transparent 70%)}
.datapoints{position:absolute;inset:0;pointer-events:none}
.dp{position:absolute;display:flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.08em;color:rgba(238,243,238,.85);opacity:0;transform:translateY(8px);transition:opacity .8s ease,transform .8s ease;white-space:nowrap}
.dp.on{opacity:1;transform:none}
.dp i{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 0 rgba(143,209,138,.6);animation:ping 2.4s infinite}
.dp em{font-style:normal;padding:4px 10px;border:1px solid rgba(143,209,138,.35);background:rgba(5,12,9,.45);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);border-radius:999px}
.dp::before{content:"";position:absolute;left:4px;top:4px;width:1px;height:0}
@keyframes ping{0%{box-shadow:0 0 0 0 rgba(143,209,138,.55)}80%,100%{box-shadow:0 0 0 14px rgba(143,209,138,0)}}

/* ---------- nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:20;display:flex;align-items:center;justify-content:space-between;padding:22px clamp(20px,4vw,56px);transition:background .4s,padding .4s,border-color .4s;border-bottom:1px solid transparent}
.nav.scrolled{background:rgba(5,12,9,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);padding:14px clamp(20px,4vw,56px);border-color:var(--line)}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand-cn{font-weight:500;letter-spacing:.12em;font-size:17px}
.brand-en{font-family:var(--en);font-size:11px;letter-spacing:.32em;color:var(--dim);padding-left:10px;border-left:1px solid var(--line)}
.nav-links{display:flex;gap:34px;align-items:center;font-size:14px;letter-spacing:.1em}
.nav-links a{opacity:.8;transition:opacity .2s}
.nav-links a:hover{opacity:1}
.nav-cta{padding:8px 18px;border:1px solid rgba(238,243,238,.4);border-radius:999px;opacity:1!important}
.nav-toggle{display:none;background:none;border:0;width:36px;height:36px;position:relative}
.nav-toggle span{position:absolute;left:8px;right:8px;height:1px;background:var(--ink);transition:.3s}
.nav-toggle span:first-child{top:14px}.nav-toggle span:last-child{top:22px}

/* ---------- type ---------- */
.eyebrow{font-family:var(--en);font-size:12px;letter-spacing:.32em;color:var(--accent);text-transform:uppercase;margin-bottom:22px}
.h2{font-size:clamp(34px,5.2vw,72px);font-weight:200;line-height:1.18;letter-spacing:.02em;margin-bottom:28px}
.h2.sm{font-size:clamp(28px,3.6vw,48px)}
.lead{font-size:clamp(15px,1.3vw,18px);color:var(--dim);max-width:640px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 30px;border-radius:999px;font-size:15px;letter-spacing:.12em;transition:.3s;cursor:pointer;border:1px solid transparent;font-family:inherit}
.btn-primary{background:var(--accent);color:#06100c;font-weight:500}
.btn-primary:hover{background:var(--accent2)}
.btn-ghost{border-color:rgba(238,243,238,.45);color:var(--ink)}
.btn-ghost:hover{background:rgba(238,243,238,.08)}

/* ---------- v2：滚动轨道 + 叠加文案层 ---------- */
main{position:relative;z-index:3}
#track{position:relative;pointer-events:none}
#track .mark{position:absolute;left:0;width:1px;height:1px}
.progress{position:absolute;left:clamp(20px,4vw,56px);bottom:28px;width:120px;height:1px;background:rgba(238,243,238,.18)}
.progress i{position:absolute;left:0;top:0;bottom:0;width:100%;transform-origin:left;transform:scaleX(var(--p,0));background:var(--accent)}

#overlays{position:fixed;inset:0;z-index:2;pointer-events:none}
.ov{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;visibility:hidden;padding:90px 0 60px}
.ov.vis{visibility:visible}
.ov.on{pointer-events:auto}
.ov .st{opacity:0;will-change:transform,opacity}
.ov .wrap{position:relative}

.hero-title{font-size:clamp(40px,6.6vw,96px);font-weight:200;line-height:1.12;letter-spacing:.02em;margin-bottom:28px;text-shadow:0 2px 30px rgba(0,0,0,.35)}
.hero-sub{font-size:clamp(15px,1.4vw,19px);color:rgba(238,243,238,.8);max-width:640px;margin-bottom:40px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.scroll-hint{position:absolute;left:50%;bottom:32px;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:10px;font-size:11px;letter-spacing:.3em;color:var(--dim)}
.scroll-hint i{width:1px;height:44px;background:linear-gradient(var(--ink),transparent);animation:drip 2s infinite}
@keyframes drip{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* 玻璃材质 */
.glass,.glass-card,.glass-band{background:linear-gradient(160deg,rgba(14,32,24,.52),rgba(5,12,9,.38));border:1px solid rgba(238,243,238,.14);backdrop-filter:blur(14px) saturate(1.2);-webkit-backdrop-filter:blur(14px) saturate(1.2)}
.glass-card{display:inline-block;max-width:640px;padding:42px 44px;border-radius:4px}
.glass-card.wide{max-width:720px}
.glass-card p:not(.eyebrow){color:rgba(238,243,238,.82);font-size:clamp(15px,1.3vw,18px)}
.glass-card .h2{margin-bottom:20px;font-size:clamp(30px,4.1vw,58px)}

.ov-vision{justify-content:flex-end;padding-bottom:0}
.ov-vision .h2{margin-bottom:48px}
.glass-band{border-left:0;border-right:0}
.band-grid{display:grid;grid-template-columns:repeat(4,1fr)}
.band-item{padding:38px 28px;border-left:1px solid var(--line);display:flex;flex-direction:column;gap:6px}
.band-item:first-child{border-left:0;padding-left:0}
.band-item b{font-size:clamp(20px,2vw,28px);font-weight:300;letter-spacing:.06em}
.band-item span{font-size:13px;color:var(--dim);letter-spacing:.18em}

.glass-grid{display:grid;gap:14px;margin-top:40px}
.glass-grid.four{grid-template-columns:repeat(4,1fr)}
.glass{padding:30px 26px 34px;border-radius:4px;transition:border-color .4s,background .4s}
.glass:hover{border-color:rgba(143,209,138,.45)}
.glass .idx{font-family:var(--en);font-size:12px;letter-spacing:.2em;color:var(--accent)}
.glass h3{font-size:clamp(19px,1.7vw,24px);font-weight:300;margin:16px 0 10px;letter-spacing:.08em}
.glass p{color:var(--dim);font-size:14.5px}
.ov-pain .glass{border-top:1px solid rgba(214,170,110,.55)}
.ov-pain .idx{color:#d6aa6e}
.ov-pain .eyebrow{color:#d6aa6e}
.ov-adv .glass{border-top:1px solid var(--accent)}
.ov-adv .glass h3{margin-top:0}

.chain{list-style:none;display:flex;justify-content:space-between;margin-top:64px;position:relative;max-width:900px}
.chain::before{content:"";position:absolute;left:0;right:0;top:7px;height:1px;background:linear-gradient(90deg,var(--accent),rgba(143,209,138,.15))}
.chain li{position:relative;display:flex;flex-direction:column;align-items:flex-start;gap:18px;font-size:clamp(14px,1.5vw,20px);letter-spacing:.2em;text-shadow:0 1px 12px rgba(0,0,0,.6)}
.chain li i{width:15px;height:15px;border-radius:50%;background:rgba(5,12,9,.6);border:1px solid var(--accent);box-shadow:0 0 18px rgba(143,209,138,.6)}
.chain li:last-child i{background:var(--accent)}

.ticks{list-style:none;margin-top:26px;display:grid;grid-template-columns:1fr 1fr;gap:12px 24px}
.ticks li{padding-left:26px;position:relative;font-size:15px}
.ticks li::before{content:"";position:absolute;left:0;top:.8em;width:14px;height:1px;background:var(--accent)}

.biz{padding:0;overflow:hidden}
.biz-img{aspect-ratio:16/10;background-size:cover;background-position:center;transition:transform 1.2s}
.biz:hover .biz-img{transform:scale(1.05)}
.biz-body{padding:20px 22px 24px}
.tag{font-family:var(--en);font-size:11px;letter-spacing:.26em;color:var(--accent)}
.biz h3{margin:8px 0 6px}

/* 视频结束后的版块：叠在定格航拍上的半透明玻璃 */
.after{position:relative}
.glass-sec{padding:clamp(80px,11vw,150px) 0;background:linear-gradient(180deg,rgba(5,12,9,.35),rgba(5,12,9,.62));backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-top:1px solid var(--line)}
.glass-sec.partners{background:linear-gradient(180deg,rgba(5,12,9,0),rgba(5,12,9,.5) 30%,rgba(5,12,9,.6));border-top:0;padding-top:clamp(120px,16vw,220px)}
.logo-wall{display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:40px}
.logo-slot{background:rgba(5,12,9,.55);height:110px;display:flex;align-items:center;justify-content:center;color:rgba(238,243,238,.3);font-size:13px;letter-spacing:.16em}
.news{border-top:1px solid var(--line)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:40px}
.news-img{aspect-ratio:16/10;background-size:cover;background-position:center;margin-bottom:20px;filter:saturate(.8)}
.news-card time{font-size:12px;letter-spacing:.2em;color:var(--accent)}
.news-card h3{font-size:20px;font-weight:300;margin:8px 0}
.news-card p{color:var(--dim);font-size:14px}

.contact{background:radial-gradient(ellipse at 15% 80%,#0d2419 0%,var(--bg) 55%)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:80px}
.contact-info{margin-top:44px;display:grid;gap:16px}
.contact-info div{display:flex;gap:24px;border-bottom:1px solid var(--line);padding-bottom:14px}
.contact-info dt{width:56px;color:var(--dim);font-size:14px}
.form{display:grid;grid-template-columns:1fr 1fr;gap:22px 20px;align-content:start}
.form label{display:flex;flex-direction:column;gap:8px;font-size:13px;letter-spacing:.12em;color:var(--dim)}
.form .full{grid-column:1/-1}
.form input,.form select,.form textarea{font:inherit;font-size:15px;color:var(--ink);background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:4px;padding:13px 14px;outline:none;transition:border-color .3s}
.form select{appearance:none;-webkit-appearance:none}
.form select option{color:#000}
.form input:focus,.form select:focus,.form textarea:focus{border-color:var(--accent)}
.form-tip{font-size:14px;color:var(--accent);min-height:1.6em}

.footer{position:relative;z-index:2;background:#030806;border-top:1px solid var(--line);padding:50px 0 40px;font-size:13px;color:var(--dim)}
.foot-grid{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;align-items:flex-start}
.foot-brand{display:flex;flex-direction:column;gap:4px}
.foot-brand b{color:var(--ink);font-weight:400;letter-spacing:.14em}
.footer nav{display:flex;gap:24px}
.foot-legal{display:flex;flex-direction:column;gap:4px;text-align:right}
.muted{opacity:.6}

/* reveal */
.reveal{opacity:0;transform:translateY(28px);transition:opacity 1s cubic-bezier(.2,.7,.2,1),transform 1s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}


/* reveal（视频结束后的版块使用） */
.reveal{opacity:0;transform:translateY(28px);transition:opacity 1s cubic-bezier(.2,.7,.2,1),transform 1s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .nav-links{position:fixed;inset:0;background:rgba(5,12,9,.96);flex-direction:column;justify-content:center;gap:28px;font-size:20px;opacity:0;pointer-events:none;transition:opacity .3s}
  .nav.open .nav-links{opacity:1;pointer-events:auto}
  .nav-toggle{display:block;z-index:2}
  .nav.open .nav-toggle span:first-child{transform:translateY(4px) rotate(45deg)}
  .nav.open .nav-toggle span:last-child{transform:translateY(-4px) rotate(-45deg)}
  .brand-en{display:none}
  .stage-shade{background:linear-gradient(0deg,rgba(3,8,6,.88) 0%,rgba(3,8,6,.45) 50%,rgba(3,8,6,.5) 100%)}
  .ov{justify-content:flex-end;padding:80px 0 56px}
  .ov-hero{justify-content:center}
  .glass-grid.four{grid-template-columns:1fr 1fr;gap:10px;margin-top:24px}
  .glass{padding:18px 16px 20px}
  .glass.biz{padding:0}
  .glass h3{font-size:17px;margin:8px 0 6px}
  .glass p{font-size:13px;line-height:1.6}
  .band-grid{grid-template-columns:1fr 1fr}
  .band-item{padding:20px 14px}
  .band-item:nth-child(odd){border-left:0;padding-left:0}
  .band-item:nth-child(n+3){border-top:1px solid var(--line)}
  .glass-card{padding:26px 22px;display:block}
  .ticks{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr;gap:50px}
  .news-grid{grid-template-columns:1fr}
  .logo-wall{grid-template-columns:repeat(3,1fr)}
  .br-d{display:none}
  .progress{display:none}
}
@media (max-width:560px){
  .wrap{width:calc(100% - 40px)}
  .h2{font-size:30px;margin-bottom:16px}
  .eyebrow{margin-bottom:12px;font-size:11px}
  .lead{font-size:14px}
  .chain{margin-top:30px}
  .chain li{font-size:12px;letter-spacing:.08em;gap:12px}
  .chain li i{width:11px;height:11px}
  .biz-img{aspect-ratio:16/8}
  .biz-body{padding:12px 12px 14px}
  .biz .tag{display:none}
  .biz p{display:none}
  .form{grid-template-columns:1fr}
  .foot-legal{text-align:left}
  .dp{font-size:11px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .dp i{animation:none}
}

/* 2026-11-02 润民 LOGO */
.brand-mark{width:34px;height:auto;display:block;filter:drop-shadow(0 1px 6px rgba(0,0,0,.45))}
.brand-cn{text-shadow:0 1px 8px rgba(0,0,0,.45)}
.foot-logo{display:flex;align-items:center;gap:12px}
.foot-logo img{width:40px;height:auto;display:block}
@media (max-width:768px){.brand-mark{width:30px}}

/* 2026-11-02 手机性能：去掉毛玻璃实时模糊（移动端 GPU 每帧重算），改半透明实底；will-change 只给可见浮层 */
.ov .st{will-change:auto}
.ov.vis .st{will-change:transform,opacity}
@media (max-width:768px){
  .glass,.glass-card,.glass-band{backdrop-filter:none;-webkit-backdrop-filter:none;background:linear-gradient(160deg,rgba(14,32,24,.82),rgba(5,12,9,.74))}
  .glass-sec{backdrop-filter:none;-webkit-backdrop-filter:none;background:linear-gradient(180deg,rgba(5,12,9,.72),rgba(5,12,9,.88))}
  .nav.scrolled{backdrop-filter:none;-webkit-backdrop-filter:none;background:rgba(5,12,9,.9)}
  .dp em{backdrop-filter:none;-webkit-backdrop-filter:none;background:rgba(5,12,9,.7)}
  .stage-grid{display:none}
}

/* 2026-11-02 手机排版：数据标签收进导航下方的预留区（最多两行自动换行），叠加文案整体让出该区域，永不压字 */
@media (max-width:768px){
  .datapoints{inset:auto;top:76px;left:0;right:0;display:flex;flex-wrap:wrap;align-content:flex-start;gap:8px 8px;padding:0 20px;pointer-events:none;z-index:3}
  .dp{position:static;flex:0 0 auto;gap:6px;font-size:11px}
  .dp i{width:7px;height:7px}
  .dp em{padding:3px 9px}
  .ov{padding-top:150px}
  .ov-hero{justify-content:flex-end;padding-bottom:110px}
}
@media (max-width:768px) and (max-height:700px){
  .datapoints{top:68px}
  .ov{padding-top:140px;padding-bottom:36px}
  .ov-hero{padding-bottom:84px}
  .scroll-hint{bottom:14px}
  .scroll-hint i{height:28px}
}

/* 2026-11-02 手机/微信序列帧：不用 <video>，canvas 逐帧绘制 */
#seqCanvas{display:none}
html.seq #stage video{display:none}
html.seq #seqCanvas{display:block;visibility:hidden;position:absolute;inset:0;width:100%;height:100%}
/* 2026-11-02 手机排版精修：首屏按钮与“向下滑动”拉开呼吸距离 */
@media (max-width:768px){
  .ov-hero{padding-bottom:128px}
  .scroll-hint{bottom:22px;gap:8px}
  .scroll-hint i{height:30px}
}
@media (max-width:768px) and (max-height:700px){
  .ov-hero{padding-bottom:96px}
  .scroll-hint{bottom:12px}
  .scroll-hint i{height:22px}
}
@media (max-width:768px){
  .logo-wall{grid-template-columns:repeat(2,1fr);margin-top:28px}
  .logo-slot{height:84px;padding:0 10px;text-align:center;font-size:12px;letter-spacing:.1em;white-space:nowrap}
}
@media (max-width:768px){.ov p,.lead{text-wrap:pretty}}