:root{
  --ink:#0c1d19; --ink2:#12302a; --moss:#7fb08a; --moss2:#a9d1b0; --sand:#f5f2ea; --paper:#fbfaf6;
  --amber:#a77a2e; --navy:#14284b; --navy-ink:#ffffff; --text:#1e2a26; --mute:#5d6b65;
  --serif:"Noto Serif SC","Songti SC","Source Han Serif SC","STSong",Georgia,serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--text);background:var(--paper);line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1140px;margin:0 auto;padding:0 28px}

/* nav */
.nav{position:fixed;inset:0 0 auto 0;z-index:50;display:flex;justify-content:space-between;align-items:center;padding:18px 40px;color:var(--navy-ink);background:rgba(20,40,75,.95);backdrop-filter:blur(10px);transition:.4s}
.nav.solid{padding:12px 40px;box-shadow:0 8px 24px -14px rgba(8,20,45,.7)}
.brand{font-family:var(--serif);font-size:22px;letter-spacing:.08em;display:flex;align-items:center;gap:10px}
.mark{display:inline-block;width:14px;height:14px;border-radius:50%;background:radial-gradient(circle at 35% 35%,#d9f0dd,var(--moss) 60%,#3f7a52);box-shadow:0 0 0 4px rgba(127,176,138,.25);margin-right:2px}
.nav nav{display:flex;gap:34px;align-items:center;font-size:17px;letter-spacing:.06em}
.nav nav a{opacity:.82;transition:.2s}.nav nav a:hover{opacity:1}
.nav .cta{border:1px solid rgba(255,255,255,.55);padding:7px 22px;border-radius:30px;opacity:1}
.nav .cta:hover{background:#fff;color:var(--navy)}

/* hero */
.hero{position:relative;height:100vh;min-height:620px;overflow:hidden;color:var(--ink);
  background:radial-gradient(120% 90% at 50% 38%,#ffffff 0%,#f3f8f5 55%,#e6f0ea 100%)}
#fly{position:absolute;inset:0;width:100%;height:100%}
.layers{position:absolute;inset:auto 0 0 0;height:46%;pointer-events:none}
.ridge{position:absolute;left:-5%;bottom:0;width:110%;height:100%;transform-origin:50% 100%;will-change:transform}
.ridge path{stroke:none}
.r3{fill:#d3e7dd;opacity:.7;animation:zoom 26s ease-in-out infinite alternate}
.r2{fill:#bfdccd;opacity:.75;animation:zoom 20s ease-in-out infinite alternate-reverse}
.r1{fill:#a9cdba;opacity:.8;animation:zoom 15s ease-in-out infinite alternate}
@keyframes zoom{from{transform:scale(1) translateY(0)}to{transform:scale(1.14) translateY(2%)}}
.mist{position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(to top,rgba(255,255,255,.55),transparent 36%),radial-gradient(60% 40% at 50% 55%,rgba(127,176,138,.10),transparent 70%)}

.slides{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;text-align:center;padding:0 24px}
.slide{position:absolute;max-width:900px;opacity:0;pointer-events:none;will-change:transform,opacity,filter}
/* 每屏停留 --dur（6s，由 main.js 设置）：前 3s 由远及近到位（50%），之后清晰停留，末尾淡出 */
.slide.on{pointer-events:auto;animation:approach var(--dur,6s) linear forwards}
.slide.out{animation:quit .5s ease-out forwards}
@keyframes approach{
  0%{opacity:0;transform:scale(.6);filter:blur(14px);animation-timing-function:cubic-bezier(.2,.7,.3,1)}
  50%{opacity:1;transform:scale(1);filter:blur(0)}
  92%{opacity:1;transform:scale(1.03);filter:blur(0)}
  100%{opacity:0;transform:scale(1.08);filter:blur(6px)}
}
@keyframes quit{from{opacity:.9;transform:scale(1.04)}to{opacity:0;transform:scale(1.3);filter:blur(12px)}}
.eyebrow{font-size:13px;letter-spacing:.42em;color:#3f7a52;margin-bottom:26px;text-transform:uppercase}
.slide h1{font-family:var(--serif);font-weight:600;font-size:clamp(34px,6vw,72px);line-height:1.22;letter-spacing:.04em}
.lead{margin-top:30px;font-size:clamp(15px,1.5vw,19px);color:#4a5b52;letter-spacing:.05em;line-height:1.95}
.hero-foot{position:absolute;left:0;right:0;bottom:28px;display:flex;flex-direction:column;align-items:center;gap:20px}
.dots{display:flex;gap:12px}
.dots button{width:34px;height:3px;border:0;background:rgba(12,29,25,.14);cursor:pointer;position:relative;overflow:hidden;border-radius:2px}
.dots button.on::after{content:"";position:absolute;inset:0;background:#3f7a52;transform-origin:left;animation:fill var(--dur,7s) linear forwards}
@keyframes fill{from{transform:scaleX(0)}to{transform:scaleX(1)}}
.scroll{font-size:12px;letter-spacing:.3em;color:var(--mute);display:flex;flex-direction:column;align-items:center;gap:8px}
.scroll i{width:1px;height:34px;background:linear-gradient(#3f7a52,transparent);animation:drop 2s infinite}
@keyframes drop{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}}

/* sections */
.sec{padding:120px 0;position:relative}
.sec.dark{background:#f7faf8}
.kicker{font-size:13px;letter-spacing:.38em;color:var(--moss);margin-bottom:18px}
h2{text-wrap:balance;font-family:var(--serif);font-weight:600;font-size:clamp(26px,3.6vw,44px);line-height:1.35;letter-spacing:.03em;max-width:860px}
.sub{margin-top:22px;color:var(--mute);max-width:760px;font-size:16.5px}
h3{font-family:var(--serif);font-weight:600;font-size:20px;letter-spacing:.03em;margin-bottom:10px}

.chain{list-style:none;counter-reset:s;display:grid;grid-template-columns:repeat(6,1fr);gap:0;margin:56px 0 64px;border-top:1px solid #cfd8d1}
.chain li{counter-increment:s;padding:26px 14px 0 0;position:relative}
.chain li::before{content:"";position:absolute;top:-5px;left:0;width:9px;height:9px;border-radius:50%;background:var(--moss);box-shadow:0 0 0 4px rgba(127,176,138,.2)}
.chain b{display:block;font-family:var(--serif);font-size:16px;margin-bottom:6px}
.chain span{font-size:13.5px;color:var(--mute);display:block;line-height:1.6}
.three{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.three p{color:var(--mute);font-size:15.5px}

.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:56px}
.grid4>div{padding:28px 24px;border:1px solid #e1e8e3;border-radius:6px;background:#fff}
.grid4 i{font-style:normal;font-family:var(--serif);font-size:30px;color:var(--amber);display:block;margin-bottom:12px}
.grid4 h3{font-size:18px}.grid4 p{color:var(--mute);font-size:14.5px}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:28px}
.card{background:#fff;border:1px solid #e3e8e2;border-radius:8px;padding:30px 30px 32px;position:relative;transition:transform .4s,box-shadow .4s}
.card:hover{transform:translateY(-6px);box-shadow:0 22px 50px -24px rgba(12,29,25,.35)}
.card .no{font-family:var(--serif);font-size:14px;color:var(--moss);letter-spacing:.2em}
.card h3{margin:10px 0 12px}
.card p{color:var(--mute);font-size:15px;line-height:1.85}
.card ul{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.card li{font-size:12px;background:var(--sand);color:#4a5b52;padding:3px 11px;border-radius:20px}


.two{display:grid;grid-template-columns:1.15fr 1fr;gap:70px;align-items:center}
.levels{background:#f4f8f6;border:1px solid #e1e8e3;color:var(--text);border-radius:10px;padding:34px 34px 28px}
.levels h4{font-family:var(--serif);font-size:15px;letter-spacing:.2em;color:#3f7a52;margin-bottom:20px;font-weight:600}
.levels div{position:relative;padding:14px 0;font-size:16px;border-top:1px solid #e1e8e3}
.levels div i{position:absolute;left:0;bottom:0;height:2px;width:0;background:linear-gradient(90deg,var(--moss),var(--amber));transition:width 1.6s cubic-bezier(.2,.8,.2,1)}
.levels.in div i{width:var(--w)}


.modules{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#e1e8e3;border:1px solid #e1e8e3;margin-top:52px}
.modules>div{background:#fff;padding:30px 28px}
.modules h3{font-size:18px}.modules p{color:var(--mute);font-size:14px}
.modules>div:last-child h3{color:var(--amber)}
.scenes{display:flex;flex-wrap:wrap;gap:12px;margin-top:44px}
.scenes span{border:1px solid #cfd8d1;color:#3f7a52;background:#fff;padding:5px 18px;border-radius:30px;font-size:13px;letter-spacing:.1em}

.partner{background:#fff}
.pgrid{display:grid;grid-template-columns:1.05fr 1fr;gap:72px;align-items:start}
.pleft h2{font-size:clamp(26px,3.2vw,40px)}
.ways{list-style:none;margin-top:44px;border-top:1px solid #e1e8e3}
.ways li{display:flex;gap:22px;padding:24px 0;border-bottom:1px solid #e1e8e3}
.ways i{font-style:normal;font-family:var(--serif);color:var(--amber);font-size:22px;line-height:1.3;min-width:34px}
.ways h3{font-size:18px;margin-bottom:6px}
.ways p{color:var(--mute);font-size:14.5px;line-height:1.8}
.direct{margin-top:30px;font-size:14px;color:var(--mute)}
.direct a{color:#2f6f55;border-bottom:1px solid rgba(47,111,85,.4);margin-left:6px}
.direct a:hover{color:var(--ink)}
.contact{background:#fbfcfb;border:1px solid #e1e8e3;color:var(--text);border-radius:14px;padding:38px 36px 30px;display:grid;gap:18px;box-shadow:0 30px 70px -40px rgba(12,29,25,.35);position:sticky;top:90px}
.contact h3{font-size:22px;margin:0}
.contact .fsub{font-size:13.5px;color:var(--mute);margin-top:-10px}
.contact label{display:grid;gap:6px;font-size:13px;color:#4a5b52;letter-spacing:.04em}
.contact .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.contact input:not([type=radio]),.contact textarea{font:inherit;font-size:15px;color:var(--text);padding:11px 13px;border:1px solid #d4dcd6;border-radius:7px;background:#fff;width:100%;resize:vertical;transition:.2s}
.contact input:focus,.contact textarea:focus{outline:0;border-color:var(--moss);box-shadow:0 0 0 3px rgba(127,176,138,.25)}
.types{border:0;display:flex;gap:10px;flex-wrap:wrap}
.types legend{font-size:13px;color:#4a5b52;letter-spacing:.04em;margin-bottom:8px;float:left;width:100%}
.types label{display:block}
.types input{position:absolute;opacity:0}
.types span{display:inline-block;padding:7px 18px;border:1px solid #cfd8d1;border-radius:30px;font-size:13.5px;cursor:pointer;transition:.2s;background:#fff}
.types input:checked+span{background:var(--ink2);border-color:var(--ink2);color:#fff}
.types input:focus-visible+span{box-shadow:0 0 0 3px rgba(127,176,138,.4)}
.contact button{font:inherit;letter-spacing:.3em;border:0;background:linear-gradient(135deg,#1d4a3e,var(--ink2));color:#fff;padding:14px;border-radius:8px;cursor:pointer;transition:.25s}
.contact button:hover{filter:brightness(1.25);transform:translateY(-1px)}
.hint{font-size:12px;color:#8a978f;line-height:1.6}

footer{background:var(--navy);color:#a9b8d3;padding:14px 0;font-size:13px}
footer .wrap{display:flex;justify-content:space-between;align-items:center;gap:6px 20px;flex-wrap:wrap}

/* reveal：由远及近 */
.rv{opacity:0;transform:translateY(34px) scale(.965);transition:opacity .9s ease,transform 1.1s cubic-bezier(.16,.8,.24,1)}
.rv.in{opacity:1;transform:none}

@media(max-width:900px){
  .nav{padding:14px 20px}.nav nav a:not(.cta){display:none}
  .chain{grid-template-columns:1fr 1fr;row-gap:28px}
  .three,.cards,.modules,.two,.pgrid{grid-template-columns:1fr}.pgrid{gap:48px}.contact{position:static;padding:28px 22px}
  .grid4{grid-template-columns:1fr 1fr}
  .sec{padding:84px 0}.contact .row{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){
  .ridge,.scroll i{animation:none}.rv{opacity:1;transform:none;transition:none}
  .slide.on{animation:fade var(--dur,6s) linear forwards}.slide.out{animation:none}
  @keyframes fade{0%,100%{opacity:0}10%,90%{opacity:1}}
}
footer .icp{color:#dbe4f3}footer .icp:hover{text-decoration:underline}

/* 私有化部署 · 保密安全 */
.secure{margin-top:48px;border-radius:14px;padding:38px 40px;color:var(--text);position:relative;overflow:hidden;border:1px solid #d6e6dc;
  background:radial-gradient(80% 140% at 100% 0%,#e3f1ea 0%,transparent 60%),linear-gradient(135deg,#f8fbf9,#eef6f1);box-shadow:0 24px 60px -40px rgba(12,29,25,.35)}
.shead{display:flex;gap:22px;align-items:flex-start}
.shead h3{font-size:24px;margin-bottom:8px}
.shead p{color:var(--mute);font-size:15.5px;max-width:760px}
.lock{flex:none;width:46px;height:46px;border-radius:12px;border:1px solid #b9d6c5;background:#fff;position:relative;margin-top:2px}
.lock::before{content:"";position:absolute;left:13px;top:8px;width:18px;height:16px;border:2px solid #3f7a52;border-bottom:0;border-radius:10px 10px 0 0}
.lock::after{content:"";position:absolute;left:11px;top:22px;width:22px;height:15px;border-radius:3px;background:#3f7a52}
.secure ul{list-style:none;display:grid;grid-template-columns:repeat(4,1fr);gap:0;margin-top:30px;border-top:1px solid #d6e6dc}
.secure li{padding:22px 22px 0 0}
.secure li+li{padding-left:22px;border-left:1px solid #d6e6dc}
.secure li b{display:block;font-family:var(--serif);color:var(--amber);font-size:17px;margin-bottom:6px;font-weight:600}
.secure li span{font-size:13.5px;color:var(--mute);line-height:1.7;display:block}
@media(max-width:900px){.secure{padding:28px 22px}.secure ul{grid-template-columns:1fr 1fr;row-gap:6px}.secure li:nth-child(odd){padding-left:0;border-left:0}}

.points{list-style:none;margin-top:34px;border-top:1px solid #e1e8e3}
.points li{padding:18px 0;border-bottom:1px solid #e1e8e3;display:flex;gap:22px;align-items:baseline}
.points b{font-family:var(--serif);font-size:17px;min-width:130px;color:var(--ink2)}
.points span{color:var(--mute);font-size:15px}
@media(max-width:900px){.points li{flex-direction:column;gap:4px}}

/* 平台入口弹窗 */
#access{border:0;border-radius:16px;padding:44px 40px 32px;max-width:440px;width:calc(100% - 40px);text-align:center;color:var(--text);box-shadow:0 40px 100px -30px rgba(8,20,45,.6);margin:auto}
#access::backdrop{background:rgba(12,24,48,.55);backdrop-filter:blur(4px)}
#access .lock{display:inline-block;margin-bottom:18px}
#access h3{font-size:22px;margin-bottom:12px}
#access p{color:var(--mute);font-size:15px;line-height:1.85}
#access .btn{display:inline-block;margin:26px 0 14px;padding:12px 34px;border-radius:30px;background:var(--navy);color:#fff;letter-spacing:.15em;font-size:15px;transition:.25s}
#access .btn:hover{filter:brightness(1.3)}
#access .have{font-size:13px;color:#8a978f}
#access .have a{color:var(--navy);border-bottom:1px solid rgba(20,40,75,.4);margin-left:4px}
#access .x{position:absolute;top:12px;right:16px;border:0;background:none;font-size:26px;line-height:1;color:#8a978f;cursor:pointer}
#access .x:hover{color:var(--ink)}

.logo{display:block;flex:none}
.brand .logo{width:40px;height:40px;filter:drop-shadow(0 2px 8px rgba(0,0,0,.25))}
footer .fbrand{display:flex;align-items:center;gap:8px}
.brand sup{font-size:.62em;line-height:0;position:relative;top:-.15em;margin-left:1px;color:var(--moss2);font-family:var(--sans);font-weight:600}