/* motion-kit 共用样式：三套版式共用 token / 排版 / 组件。改主题只改这里。 */
:root{
 --ink:#0E1A24;--ink2:#16232F;--line:#233543;--text:#E8EEF3;--sub:#93A7B6;
 --accent:#3FA97F;--accent2:#1E7A9B;--warn:#F2C14E;--w:1200px;
 --serif:"Songti SC","Noto Serif SC",Georgia,serif;
}
[data-theme="light"]{--ink:#F7F9FA;--ink2:#FFFFFF;--line:#E3E8EC;--text:#16232F;--sub:#6B7A88;--accent:#12805C;--accent2:#1E6E96}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font:16px/1.7 -apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:#0B141B;-webkit-font-smoothing:antialiased}
[data-theme="light"] body{background:var(--ink)}
.wrap{max-width:var(--w);margin:0 auto;padding:0 26px}
.kick{font-size:12.5px;letter-spacing:3.4px;color:var(--accent);font-weight:600}
h1{font-family:var(--serif);font-size:clamp(30px,5.2vw,58px);line-height:1.24;margin:14px 0 16px;font-weight:600}
.h2{font-family:var(--serif);font-size:clamp(24px,3vw,36px);line-height:1.3;margin-bottom:12px}
.sub{color:var(--sub);max-width:44em}
/* 顶栏 + 进度 */
.bar{position:fixed;top:0;left:0;right:0;height:3px;z-index:60}
.bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent2))}
.nav{position:fixed;top:3px;left:0;right:0;z-index:55;backdrop-filter:blur(8px);background:rgba(11,20,27,.72);border-bottom:1px solid rgba(255,255,255,.06)}
[data-theme="light"] .nav{background:rgba(255,255,255,.8);border-bottom-color:var(--line)}
.nav .in{max-width:var(--w);margin:0 auto;padding:13px 26px;display:flex;align-items:center;gap:22px}
.nav b{font-size:15px}.nav span{font-size:13.5px;color:var(--sub)}
.nav a.cta{margin-left:auto;font-size:13.5px;border:1px solid rgba(255,255,255,.24);border-radius:3px;padding:7px 14px;color:inherit;text-decoration:none}
[data-theme="light"] .nav a.cta{border-color:var(--line)}
.tag{position:fixed;right:14px;bottom:14px;z-index:70;font-size:11.5px;color:#0B141B;background:var(--warn);border-radius:3px;padding:3px 9px;font-weight:600}
/* 区块 + 入场 */
.sec{padding:96px 0;position:relative}
.sec.alt{background:var(--ink2)}
[data-theme="light"] .sec.alt{background:#fff}
.rv{opacity:0;transform:translateY(16px);transition:.65s cubic-bezier(.2,.7,.2,1)}
.rv.on{opacity:1;transform:none}
/* 首屏 */
.scene{height:100svh;min-height:560px;position:relative;overflow:hidden;display:flex;align-items:flex-end}
.scene .bg{position:absolute;inset:-6%;background-size:cover;background-position:center;transform:scale(1.06);will-change:transform}
.scene .veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,20,27,.72),rgba(11,20,27,.45) 38%,rgba(11,20,27,.94))}
.scene .in{position:relative;padding-bottom:11vh;width:100%}
.scene p.lead{max-width:36em;color:#C6D5DF}
.hint{margin-top:34px;font-size:13px;color:var(--sub);display:flex;align-items:center;gap:9px}
.hint s{text-decoration:none;display:block;width:22px;height:34px;border:1px solid rgba(255,255,255,.28);border-radius:12px;position:relative}
.hint s::after{content:"";position:absolute;left:50%;top:7px;width:3px;height:7px;background:#fff;border-radius:2px;transform:translateX(-50%);animation:dn 1.5s infinite}
@keyframes dn{0%{opacity:0;top:6px}40%{opacity:1}100%{opacity:0;top:18px}}
/* 细节：浅色展台 + 热点 + 参数 */
.detail{display:grid;grid-template-columns:1.25fr 1fr;gap:38px;align-items:center}
.stage{position:relative;background:linear-gradient(180deg,#fff,#EDF1F4);border:1px solid #DCE3E8;border-radius:10px;padding:34px 20px;text-align:center;box-shadow:0 18px 40px rgba(0,0,0,.35)}
.stage img{max-height:420px;max-width:100%;margin:0 auto;display:block}
.hot{position:absolute;text-align:left}
.hot .dot{width:11px;height:11px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px rgba(63,169,127,.22)}
.hot .txt{margin-top:8px;font-size:13px;background:rgba(11,20,27,.88);border:1px solid var(--line);border-radius:5px;padding:7px 10px;max-width:200px;line-height:1.5;color:#E8EEF3}
.hot .txt b{display:block;font-size:13.5px;color:#fff}
.hot.a{left:26px;top:96px}.hot.b{right:20px;bottom:104px}
.specs{border-left:2px solid var(--accent);padding-left:20px;list-style:none}
.specs li{padding:11px 0;border-bottom:1px solid var(--line);display:flex;gap:14px;font-size:14.5px}
.specs k{color:var(--sub);flex:0 0 92px}.specs v{font-weight:600}
/* 功能卡 / 数据卡 */
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.f{background:var(--ink2);border:1px solid var(--line);border-radius:10px;padding:22px 20px}
[data-theme="light"] .f{background:#fff;border-color:var(--line)}
.f b{display:block;font-size:26px;font-family:var(--serif);color:var(--accent);margin-bottom:8px}
.f h3{font-size:16.5px;margin-bottom:8px}.f p{font-size:14px;color:var(--sub)}
/* 系列横向轨道 */
.rail{display:flex;gap:16px;overflow-x:auto;padding:6px 0 18px;scroll-snap-type:x mandatory}
.rail::-webkit-scrollbar{height:6px}.rail::-webkit-scrollbar-thumb{background:#2A3D4C;border-radius:3px}
.card{flex:0 0 268px;scroll-snap-align:start;background:var(--ink2);border:1px solid var(--line);border-radius:10px;overflow:hidden}
[data-theme="light"] .card{background:#fff}
.card .im{height:170px;background:linear-gradient(180deg,#fff,#EEF2F5);display:flex;align-items:center;justify-content:center;border-bottom:1px solid #DCE3E8}
.card .im img{max-height:150px;max-width:88%}
.card .bd{padding:14px 16px 17px}.card .bd b{display:block;font-size:15px;margin-bottom:5px}
.card .bd u{text-decoration:none;font-size:13px;color:var(--accent);font-weight:600}
.card .bd p{font-size:13px;color:var(--sub);margin-top:7px}
/* 容量阶梯 */
.ladder{margin-top:26px;display:flex}
.ladder div{flex:1;text-align:center;font-size:12.5px;color:var(--sub);padding-top:12px;border-top:2px solid #2A3D4C;position:relative}
.ladder div b{display:block;color:var(--text);font-size:14px}
.ladder div::before{content:"";position:absolute;top:-5px;left:50%;width:9px;height:9px;border-radius:50%;background:var(--accent);transform:translateX(-50%)}
/* 场景切换（sticky 堆叠） */
.stack{position:relative}
.stack .pin{position:sticky;top:0;height:100svh;overflow:hidden}
.layer{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;transform:scale(1.05);transition:opacity .8s ease,transform 1.4s ease}
.layer.on{opacity:1;transform:scale(1)}
.stack .veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,20,27,.5),rgba(11,20,27,.86))}
.stack .cap{position:absolute;left:0;right:0;bottom:12vh;z-index:3}
.stack .cap .idx{font-size:12.5px;letter-spacing:3px;color:var(--accent)}
.stack .cap h3{font-family:var(--serif);font-size:clamp(24px,3.6vw,42px);margin:10px 0 8px}
.stack .cap p{color:#C6D5DF;max-width:40em}
.dots{position:absolute;right:26px;top:50%;transform:translateY(-50%);z-index:4;display:grid;gap:9px}
.dots i{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.35)}
.dots i.on{background:var(--accent);transform:scale(1.4)}
/* 数据展开 */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.stat{border-left:2px solid var(--accent);padding-left:18px}
.stat b{font-size:clamp(30px,4vw,48px);font-family:var(--serif);color:var(--accent);display:block;line-height:1.1}
.stat span{font-size:13.5px;color:var(--sub)}
.bars{display:grid;gap:12px;margin-top:26px}
.brow{display:grid;grid-template-columns:120px 1fr 64px;gap:14px;align-items:center;font-size:13.5px}
.brow .track{height:10px;background:#1B2937;border-radius:5px;overflow:hidden}
[data-theme="light"] .brow .track{background:#EDF1F4}
.brow .track i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width 1.1s cubic-bezier(.2,.7,.2,1)}
.brow u{text-decoration:none;color:var(--text);font-weight:600;text-align:right}
/* ── 拼装件：页块（Sections）────────────────────────── */
.sec-in{padding:70px 0}
.s-note{font-size:11.5px;color:var(--sub);letter-spacing:1.2px;margin-bottom:10px}
/* S1 横向轮播（居中高亮） */
.carousel{display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;padding:8px 0 18px}
.carousel::-webkit-scrollbar{height:6px}.carousel::-webkit-scrollbar-thumb{background:#2A3D4C;border-radius:3px}
.slide{flex:0 0 380px;scroll-snap-align:center;background:var(--ink2);border:1px solid var(--line);border-radius:12px;padding:22px;transition:transform .45s,opacity .45s;opacity:.55;transform:scale(.96)}
.slide.hot{opacity:1;transform:none;border-color:var(--accent)}
.slide b{font-family:var(--serif);font-size:20px;display:block;margin-bottom:8px}
.slide p{font-size:14px;color:var(--sub)}
/* S2 卡片级联 */
.cascade{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cascade .c{background:var(--ink2);border:1px solid var(--line);border-radius:12px;padding:20px}
.cascade .c:nth-child(2){transform:translateY(22px)}
.cascade .c:nth-child(3){transform:translateY(44px)}
.cascade .c b{display:block;font-size:16.5px;margin-bottom:6px}
.cascade .c p{font-size:13.5px;color:var(--sub)}
/* S3 时间线 */
.tl{position:relative;padding-left:26px}
.tl::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:var(--line)}
.tl .it{position:relative;padding:0 0 26px}
.tl .it::before{content:"";position:absolute;left:-24px;top:6px;width:11px;height:11px;border-radius:50%;background:#2A3D4C;border:2px solid var(--ink);transition:.4s}
.tl .it.on::before{background:var(--accent);box-shadow:0 0 0 5px rgba(63,169,127,.18)}
.tl .it b{display:block;font-size:16px;margin-bottom:4px}
.tl .it p{font-size:13.5px;color:var(--sub)}
/* S4 展示墙 */
.wall{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.wall .w{position:relative;border-radius:10px;overflow:hidden;border:1px solid var(--line);aspect-ratio:4/3;background:#0F1B25}
.wall .w img{width:100%;height:100%;object-fit:cover;transition:transform .8s cubic-bezier(.2,.7,.2,1)}
.wall .w:hover img{transform:scale(1.07)}
.wall .w span{position:absolute;left:10px;bottom:9px;font-size:12.5px;background:rgba(11,20,27,.72);border-radius:4px;padding:2px 8px}
/* S5 对比 */
.cmp{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.cmp>div{padding:20px 22px}
.cmp .bad{background:#151F29}.cmp .good{background:linear-gradient(180deg,#12241F,#0F1B25);border-left:1px solid var(--line)}
.cmp h4{font-size:14.5px;margin-bottom:12px;color:var(--sub)}
.cmp .good h4{color:var(--accent)}
.cmp li{list-style:none;font-size:14px;padding:7px 0;border-top:1px dashed #22303C}
/* S6 FAQ 手风琴 */
.acc{border:1px solid var(--line);border-radius:12px;overflow:hidden}
.acc .q{padding:16px 18px;cursor:pointer;display:flex;gap:12px;align-items:center;border-bottom:1px solid var(--line);font-size:15px}
.acc .q:last-of-type{border-bottom:0}
.acc .q s{text-decoration:none;margin-left:auto;color:var(--accent);transition:.3s}
.acc .a{display:none;padding:0 18px 18px;font-size:14px;color:var(--sub)}
.acc .item.open .a{display:block}.acc .item.open .q s{transform:rotate(45deg)}
/* ── 氛围层（Backgrounds / Gradients）────────────── */
.bg-demo{height:230px;border:1px solid var(--line);border-radius:12px;position:relative;overflow:hidden;margin-bottom:14px}
.bg-ptr{background:radial-gradient(600px circle at var(--mx,50%) var(--my,50%),rgba(63,169,127,.34),rgba(30,122,155,.16) 40%,#0B141B 72%)}
.bg-scan{background:repeating-linear-gradient(180deg,rgba(255,255,255,.045) 0 1px,transparent 1px 4px),linear-gradient(180deg,#0F1B25,#0B141B)}
.bg-scan::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent,rgba(63,169,127,.22),transparent);height:40%;animation:scan 6s linear infinite}
@keyframes scan{0%{transform:translateY(-60%)}100%{transform:translateY(260%)}}
.bg-grid{background-image:linear-gradient(rgba(63,169,127,.14) 1px,transparent 1px),linear-gradient(90deg,rgba(63,169,127,.14) 1px,transparent 1px);background-size:34px 34px;animation:gridp 5s ease-in-out infinite}
@keyframes gridp{0%,100%{opacity:.5}50%{opacity:1}}
.bg-blob{background:#0B141B}
.bg-blob i{position:absolute;width:280px;height:280px;border-radius:50%;filter:blur(46px);opacity:.5}
.bg-blob i:nth-child(1){background:#3FA97F;left:6%;top:10%;animation:dr1 16s ease-in-out infinite}
.bg-blob i:nth-child(2){background:#1E7A9B;right:8%;bottom:6%;animation:dr1 20s ease-in-out infinite reverse}
.bg-blob i:nth-child(3){background:#6E5CB8;left:42%;top:36%;animation:dr1 24s ease-in-out infinite}
@keyframes dr1{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(38px,-26px) scale(1.16)}}
.bg-demo .cap2{position:absolute;left:14px;bottom:12px;font-size:12.5px;color:#C6D5DF;background:rgba(11,20,27,.6);border-radius:4px;padding:3px 9px;z-index:3}
@media(max-width:900px){.cascade,.wall{grid-template-columns:1fr}.cmp{grid-template-columns:1fr}.slide{flex:0 0 280px}}
/* 表单 / 页脚 */
.cta{background:linear-gradient(120deg,#12212C,#0B141B);border-top:1px solid var(--line)}
.cta .in{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.form{display:grid;gap:12px}
input,select{font:inherit;font-size:15px;padding:13px 14px;background:#0F1B25;border:1px solid var(--line);border-radius:5px;color:#fff;width:100%}
[data-theme="light"] input,[data-theme="light"] select{background:#fff;color:var(--text)}
.btn{background:var(--accent);color:#06231A;font-weight:600;border:0;border-radius:5px;padding:15px;font-size:15.5px;cursor:pointer}
.foot{padding:26px 0;font-size:12.5px;color:#7C8D9A;border-top:1px solid var(--line);display:flex;justify-content:space-between}
@media(max-width:900px){
 .detail,.cta .in{grid-template-columns:1fr;gap:22px}
 .grid4,.stats{grid-template-columns:1fr 1fr}
 .sec{padding:64px 0}.stage{padding:22px 12px}.stage img{max-height:300px}
 .hot.a{left:8px;top:60px}.hot.b{right:8px;bottom:70px}
 .card{flex:0 0 230px}.ladder div{font-size:11.5px}.brow{grid-template-columns:88px 1fr 54px}
 .dots{right:12px}
}
@media(prefers-reduced-motion:reduce){
 .scene .bg,.layer{transform:none!important;transition:none!important}
 .rv,.f{opacity:1!important;transform:none!important}
 .hint s::after{animation:none}.brow .track i{transition:none}
}