@charset "utf-8";

/* 丹河科技 · 静态站样式
   配色取自品牌 logo 像素：蓝 #01479D / 绿 #7CC10C
   全站资源均为本地相对路径，可直接上传虚拟主机 */

:root{
  --blue:#01479D;
  --blue-deep:#023A80;
  --blue-ink:#0C3E86;
  --green:#7CC10C;
  --green-ink:#4C7808;
  --green-wash:#EFF8DF;
  --ink:#12283F;
  --ink-2:#4C6884;
  --ink-3:#57738F;
  --mist:#F3F8FE;
  --line:#DCE8F4;
  --paper:#FFFFFF;
  --night:#0E2A48;
  --focus:#4C7808;
  --wrap:1200px;
  --shell:1600px;     /* 装饰舞台：与内容版心同轴居中 */
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,p{margin:0}
:focus-visible{outline:2px solid var(--focus);outline-offset:3px;border-radius:2px}
.svg-sprite{position:absolute;width:0;height:0;overflow:hidden}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding-left:32px;padding-right:32px}
.ico{width:24px;height:24px;flex:none;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.ico--star{fill:currentColor;stroke:none}
[id]{scroll-margin-top:104px}
.skip-link{position:fixed;top:-80px;left:16px;z-index:200;padding:10px 18px;background:var(--blue);color:#fff;border-radius:0 0 8px 8px;transition:top .2s}
.skip-link:focus{top:0;outline:2px solid #fff;outline-offset:-4px}

/* ── 顶部滚动进度：一条绿弧的暗示 ───────────────────── */
.scroll-progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:120;pointer-events:none}
.scroll-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--green),#A6DE4B);box-shadow:0 0 10px rgba(124,193,12,.5)}

/* ── 导航 ─────────────────────────────────────────── */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s}
.site-header.is-stuck{border-bottom-color:var(--line);box-shadow:0 6px 24px rgba(14,42,72,.06)}
.header-inner{display:flex;align-items:center;gap:28px;min-height:88px}
.brand{flex:none;display:block}
.brand img{width:150px;height:auto}
.main-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:4px}
.nav-link{display:inline-flex;align-items:center;gap:7px;padding:10px 13px;font-size:15px;font-weight:500;color:var(--ink);white-space:nowrap;border-radius:6px;transition:color .2s,background-color .2s}
.nav-link:hover{color:var(--blue)}
.nav-link.is-current{color:var(--blue);font-weight:700}
.chev{width:9px;height:6px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;transition:transform .25s}
.nav-group{position:relative}
.nav-group.is-open .chev{transform:rotate(180deg)}
.nav-contact{margin-left:8px;padding:10px 18px;border:1px solid var(--blue);border-radius:4px;color:var(--blue);font-weight:600}
.nav-contact:hover{background:var(--blue);color:#fff}
.nav-sub{position:absolute;top:calc(100% + 10px);left:0;min-width:174px;padding:8px;background:#fff;border:1px solid var(--line);border-radius:6px;box-shadow:0 14px 34px rgba(14,42,72,.12);opacity:0;visibility:hidden;transform:translateY(-6px);transition:opacity .22s,transform .22s,visibility .22s}
.nav-sub a{display:block;padding:9px 12px;font-size:14px;color:var(--ink-2);border-radius:4px;white-space:nowrap}
.nav-sub a:hover{background:var(--mist);color:var(--blue)}
@media (min-width:861px){
  .nav-group:hover > .nav-sub,.nav-group:focus-within > .nav-sub,.nav-group.is-open > .nav-sub{opacity:1;visibility:visible;transform:none}
}
.header-tel{display:inline-flex;align-items:center;gap:8px;flex:none;font-size:15px;font-weight:700;color:var(--blue);letter-spacing:.01em;white-space:nowrap}
.header-tel .ico{width:18px;height:18px}
.header-tel:hover{color:var(--green-ink)}
.menu-toggle{display:none;width:42px;height:42px;padding:10px;flex:none;border:1px solid var(--line);border-radius:4px}
.menu-toggle span{display:block;height:2px;background:var(--blue);border-radius:2px;margin:4px 0;transition:transform .25s,opacity .2s}
.menu-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ── 通栏 BANNER ──────────────────────────────────── */
.hero{position:relative;display:flex;flex-direction:column;min-height:min(760px,90vh);background:linear-gradient(170deg,#fff 0%,#FBFDFF 55%,var(--mist) 100%);overflow:hidden}
.hero::before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;max-width:var(--shell);margin:0 auto;background-image:radial-gradient(rgba(1,71,157,.10) 1px,transparent 1px);background-size:26px 26px;mask-image:linear-gradient(90deg,transparent 40%,#000 100%);-webkit-mask-image:linear-gradient(90deg,transparent 40%,#000 100%);opacity:.6}
.hero-arcs{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;max-width:var(--shell);margin:0 auto;pointer-events:none}
.hero-arcs > svg{position:absolute;width:min(60vw,820px);height:auto;aspect-ratio:1000 / 760;right:0;top:48%;transform:translateY(-50%);opacity:.9}
.hero-arcs .arc-star{transform-origin:505px 273px}
.hero-window{position:absolute;right:12%;top:47%;width:238px;padding:0 0 18px;border:1px solid rgba(1,71,157,.18);border-radius:12px;background:rgba(255,255,255,.78);box-shadow:0 20px 50px rgba(1,71,157,.10);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);overflow:hidden}
.hw-bar{display:flex;align-items:center;gap:6px;height:34px;padding:0 12px;border-bottom:1px solid var(--line);background:rgba(243,248,254,.9)}
.hw-bar i{width:6px;height:6px;border-radius:50%;background:#C9DCEF}
.hw-bar i:first-child{background:var(--green)}
.hw-bar span{margin-left:auto;font-size:11px;color:var(--ink-3);letter-spacing:.04em}
.hw-body{padding:18px 16px}
.hw-body b{display:block;height:7px;border-radius:4px;background:#DCE8F4;margin-bottom:10px}
.hw-body b:nth-child(1){width:58%;height:11px;background:#BBD3EC}
.hw-body b:nth-child(2){width:88%}
.hw-body b:nth-child(3){width:70%}
.hw-body em{display:inline-block;width:44%;height:34px;margin:10px 8px 0 0;border-radius:5px;background:linear-gradient(135deg,rgba(1,71,157,.16),rgba(124,193,12,.20))}
.hw-body em:last-child{margin-right:0}
.hero-inner{position:relative;z-index:2;flex:1;display:flex;align-items:center;padding-top:56px;padding-bottom:56px}
.hero-copy{max-width:620px}
.hero-line{font-size:15px;font-weight:600;color:var(--green-ink);letter-spacing:.06em;margin-bottom:22px;display:flex;align-items:center;gap:10px}
.hero-line::before{content:"";width:26px;height:2px;background:var(--green)}
.hero h1{font-size:clamp(38px,5.2vw,68px);line-height:1.24;font-weight:800;letter-spacing:-.035em;color:var(--blue-deep)}
.hero-desc{margin-top:26px;max-width:31em;font-size:clamp(16px,1.35vw,18px);line-height:1.95;color:var(--ink-2)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:50px;padding:0 26px;font-size:15px;font-weight:600;border-radius:4px;transition:background-color .22s,color .22s,border-color .22s,transform .22s,box-shadow .22s}
.btn .ico{width:18px;height:18px}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(1,71,157,.18)}
.btn-primary:hover{background:var(--blue-deep);transform:translateY(-2px);box-shadow:0 12px 26px rgba(1,71,157,.26)}
.btn-ghost{border:1px solid #BFD5EC;color:var(--blue);background:rgba(255,255,255,.6)}
.btn-ghost:hover{border-color:var(--green);color:var(--green-ink);background:var(--green-wash);transform:translateY(-2px)}
.btn-lg{min-height:58px;padding:0 32px;font-size:18px;letter-spacing:.02em}
.hero-foot{position:relative;z-index:2;display:flex;align-items:center;gap:18px;padding-top:18px;padding-bottom:20px;border-top:1px solid rgba(1,71,157,.10);font-size:13px;color:var(--ink-3)}
.hero-foot-sep{width:3px;height:3px;border-radius:50%;background:var(--green)}
.hero-scroll{margin-left:auto;display:inline-flex;align-items:center;gap:12px;color:var(--ink-2)}
.hero-scroll-line{display:block;width:44px;height:1px;background:var(--ink-3);position:relative;overflow:hidden}
.hero-scroll-line::after{content:"";position:absolute;inset:0;background:var(--green);transform:translateX(-100%);animation:scrollHint 2.4s ease-in-out infinite}
@keyframes scrollHint{0%{transform:translateX(-100%)}55%,100%{transform:translateX(100%)}}
@keyframes heroIn{from{transform:translateY(18px)}to{transform:none}}
.hero-line{animation:heroIn .7s .08s}
.hero h1{animation:heroIn .8s .18s}
.hero-desc{animation:heroIn .8s .32s}
.hero-actions{animation:heroIn .8s .44s}
.hero-window{animation:heroIn 1s .5s}
.hero-arcs > svg{animation:arcIn 1.3s .05s}
@keyframes arcIn{from{transform:translateY(-50%) scale(.93)}to{transform:translateY(-50%) scale(1)}}

/* ── 业务清单（两条业务线） ────────────────────────── */
.svc{padding:112px 0 118px;background:var(--paper)}
.svc--store{background:var(--mist);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.svc-layout{display:grid;grid-template-columns:minmax(0,.86fr) minmax(0,1.14fr);gap:80px;align-items:start}
.svc-layout--flip{grid-template-columns:minmax(0,1.14fr) minmax(0,.86fr)}
.svc-layout--flip .svc-intro{grid-column:2;grid-row:1}
.svc-layout--flip .svc-list{grid-column:1;grid-row:1}
.svc-intro{position:sticky;top:132px;align-self:start}
.svc-label{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:700;color:var(--blue);margin-bottom:20px}
.svc-label .ico{width:16px;height:16px;color:var(--green)}
.svc-intro h2{font-size:clamp(29px,3.2vw,44px);line-height:1.38;font-weight:750;letter-spacing:-.03em;color:var(--ink)}
.svc-lead{margin-top:22px;max-width:30em;font-size:16px;line-height:1.95;color:var(--ink-2)}
.text-link{display:inline-block;margin-top:28px;padding-bottom:5px;font-size:15px;font-weight:600;color:var(--blue);border-bottom:1px solid var(--blue);transition:color .2s,border-color .2s}
.text-link:hover{color:var(--green-ink);border-color:var(--green)}
.svc-list{border-top:1px solid var(--line)}
.svc-row{position:relative;display:grid;grid-template-columns:52px minmax(0,1fr) auto;align-items:center;gap:22px;padding:24px 8px 24px 0;border-bottom:1px solid var(--line);transition:background-color .25s}
.svc-row::before{content:"";position:absolute;left:-16px;top:18px;bottom:18px;width:3px;background:var(--green);transform:scaleY(0);transform-origin:center;transition:transform .28s}
.svc-row:hover{background:rgba(255,255,255,.7)}
.svc--store .svc-row:hover{background:rgba(255,255,255,.85)}
.svc-row:hover::before{transform:scaleY(1)}
.svc-ico{position:relative;width:48px;height:48px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;color:var(--blue);background:rgba(255,255,255,.7);transition:border-color .25s,background-color .25s,color .25s}
.svc-ico .ico{width:23px;height:23px}
.svc-row:hover .svc-ico{border-color:var(--green);background:var(--green-wash);color:var(--green-ink)}
.svc-mark{position:absolute;left:38px;top:14px;width:13px;height:13px;color:var(--green);opacity:0;transform:scale(.5) rotate(-30deg);transition:opacity .25s,transform .3s}
.svc-row:hover .svc-mark{opacity:1;transform:scale(1) rotate(0)}
.svc-text h3{font-size:20px;font-weight:700;letter-spacing:-.01em;color:var(--ink)}
.svc-text p{margin-top:5px;font-size:14.5px;line-height:1.75;color:var(--ink-2)}
.svc-tag{padding:5px 12px;font-size:12.5px;color:var(--ink-3);border:1px solid var(--line);border-radius:100px;white-space:nowrap;background:rgba(255,255,255,.6)}

/* ── 云 + 端 通栏 ─────────────────────────────────── */
.bridge{position:relative;padding:96px 0 104px;background:linear-gradient(115deg,var(--blue) 0%,#023A80 55%,#062F68 100%);color:#fff;overflow:hidden}
.bridge::before{content:"";position:absolute;width:820px;height:820px;right:max(-260px,calc(50% - var(--shell)/2 - 260px));top:-420px;border:1px solid rgba(255,255,255,.12);border-radius:50%}
.bridge::after{content:"";position:absolute;width:620px;height:620px;right:max(-160px,calc(50% - var(--shell)/2 - 160px));top:-320px;border:1px solid rgba(124,193,12,.28);border-radius:50%}
.bridge .wrap{position:relative;z-index:1}
.bridge-head{max-width:720px}
.bridge-head h2{font-size:clamp(28px,3.4vw,44px);line-height:1.4;font-weight:750;letter-spacing:-.03em}
.bridge-head p{margin-top:18px;max-width:38em;font-size:16px;line-height:1.95;color:rgba(255,255,255,.76)}
.bridge-flow{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:66px}
.bridge-flow li{display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center}
.bf-node{width:70px;height:70px;display:grid;place-items:center;border:1px solid rgba(255,255,255,.32);border-radius:50%;background:rgba(255,255,255,.07);color:#fff;transition:border-color .3s,background-color .3s,transform .3s}
.bf-node .ico{width:28px;height:28px}
.bridge-flow li:hover .bf-node{border-color:var(--green);background:rgba(124,193,12,.18);transform:translateY(-4px)}
.bf-text{font-size:15px;font-weight:600;color:rgba(255,255,255,.92)}
.bridge-line{position:absolute;left:0;right:0;top:100px;width:100%;height:40px;pointer-events:none}

/* ── 合作方式 ─────────────────────────────────────── */
.process{padding:108px 0 112px;background:#fff}
.process-head h2{font-size:clamp(28px,3.2vw,42px);font-weight:750;letter-spacing:-.03em}
.process-head p{margin-top:14px;font-size:16px;color:var(--ink-2)}
.process-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:56px;margin-top:62px}
.process-item{position:relative;padding-top:28px;border-top:2px solid var(--line)}
.process-item::before{content:"";position:absolute;top:-2px;left:0;width:56px;height:2px;background:var(--green)}
.process-star{display:inline-flex;color:var(--green)}
.process-star .ico{width:18px;height:18px}
.process-item h3{margin-top:18px;font-size:23px;font-weight:700;letter-spacing:-.02em}
.process-item p{margin-top:12px;max-width:22em;font-size:15px;line-height:1.9;color:var(--ink-2)}

/* ── 场景 ─────────────────────────────────────────── */
.scenes{padding:0 0 112px;background:#fff}
.scenes-inner{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:60px;align-items:center;padding-top:56px;border-top:1px solid var(--line)}
.scenes-copy h2{font-size:clamp(26px,2.8vw,36px);font-weight:750;letter-spacing:-.03em}
.scenes-copy p{margin-top:14px;max-width:24em;font-size:15px;line-height:1.85;color:var(--ink-2)}
.scenes-tags{display:flex;flex-wrap:wrap;gap:12px}
.scenes-tags li{padding:11px 22px;font-size:15px;color:var(--ink);border:1px solid var(--line);border-radius:100px;transition:border-color .22s,color .22s,background-color .22s}
.scenes-tags li:hover{border-color:var(--blue);color:var(--blue);background:var(--mist)}

/* ── 联系 ─────────────────────────────────────────── */
.contact{padding:104px 0 108px;background:var(--mist);border-top:1px solid var(--line)}
.contact-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.9fr);gap:80px;align-items:center}
.contact-copy h2{font-size:clamp(34px,4.4vw,58px);line-height:1.28;font-weight:800;letter-spacing:-.035em;color:var(--blue-deep)}
.contact-copy p{margin-top:22px;max-width:27em;font-size:16px;line-height:1.95;color:var(--ink-2)}
.contact-copy .btn{margin-top:34px}
.contact-info{border-top:1px solid var(--line)}
.ci-row{display:flex;gap:20px;padding:22px 0;border-bottom:1px solid var(--line)}
.ci-row > .ico{width:22px;height:22px;color:var(--blue);margin-top:3px}
.ci-row > div{display:flex;flex-direction:column;gap:3px}
.ci-label{font-size:12.5px;color:var(--ink-3);letter-spacing:.06em}
.ci-row a{font-size:17px;font-weight:600;color:var(--ink);transition:color .2s}
.ci-row a:hover{color:var(--blue)}
.ci-row p{font-size:16px;line-height:1.7;color:var(--ink)}
.ci-row .ci-sub{font-size:13.5px;color:var(--ink-3)}

/* ── 页脚 ─────────────────────────────────────────── */
.site-footer{background:var(--night);color:rgba(255,255,255,.72);padding-top:72px}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.15fr;gap:48px;padding-bottom:60px}
.footer-brand img{width:150px;height:auto;margin-bottom:22px}
.footer-brand p{max-width:22em;font-size:14px;line-height:1.9;color:rgba(255,255,255,.58)}
.footer-col h3{margin-bottom:18px;font-size:15px;font-weight:700;color:#fff}
.footer-col a,.footer-col p{display:block;margin-bottom:10px;font-size:14px;line-height:1.7;color:rgba(255,255,255,.62);transition:color .2s}
.footer-col a:hover{color:var(--green)}
.footer-col--contact p{margin-top:8px}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:22px;padding-bottom:26px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(255,255,255,.5)}
.footer-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.footer-meta a{color:rgba(255,255,255,.7)}
.footer-meta a:hover{color:#fff;text-decoration:underline}
.site-footer :focus-visible{outline-color:var(--green)}

/* ── 滚动入场：逐项加载 + 分层视差 + 渐显 ───────────────
   隐藏态只在脚本成功标记 .rv 后生效；脚本未运行或异常时内容全部可见。
   渐显与位移分用两条不同时长的关键帧，形成由远及近的视差错落；
   is-visible 之后元素本就是可见的静态终态，动画帧不推进也不会白屏。
   只用原生 keyframes，不用 animation-timeline / view()，Chrome 与 Firefox 一致。 */
html.js .rv:not(.is-visible){opacity:0;transform:translate3d(0,var(--rv-y,32px),0)}
html.js .rv.is-visible{
  animation:rvFade var(--rv-o,.70s) ease-out var(--rv-d,0s) backwards,
            rvRise var(--rv-m,.90s) cubic-bezier(.2,.7,.2,1) var(--rv-d,0s) backwards;
}
@keyframes rvFade{from{opacity:0}to{opacity:1}}
@keyframes rvRise{from{transform:translate3d(0,var(--rv-y,32px),0)}to{transform:none}}

/* ── 平板 / 手机 ──────────────────────────────────── */
@media (max-width:1100px){
  .header-inner{gap:16px}
  .brand img{width:124px}
  .nav-link{padding:10px 9px;font-size:14px}
  .header-tel{font-size:14px}
  .svc-layout,.svc-layout--flip{grid-template-columns:1fr;gap:44px}
  .svc-layout--flip .svc-intro,.svc-layout--flip .svc-list{grid-column:1;grid-row:auto}
  .svc-intro{position:static}
  .hero-arcs > svg{width:78vw;right:-18%;opacity:.6}
  .hero-window{right:6%;width:210px}
}
@media (max-width:860px){
  .wrap{padding-left:22px;padding-right:22px}
  .header-inner{min-height:70px}
  .brand img{width:118px}
  .menu-toggle{display:block;margin-left:auto}
  .main-nav{position:absolute;top:100%;left:0;right:0;margin:0;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);box-shadow:0 20px 36px rgba(14,42,72,.12);max-height:0;overflow:hidden;visibility:hidden;transition:max-height .35s ease,visibility .35s}
  .main-nav.is-open{max-height:80vh;overflow-y:auto;visibility:visible}
  .nav-list{display:block;padding:10px 22px 20px}
  .nav-link{display:flex;width:100%;padding:13px 8px;font-size:16px;border-bottom:1px solid #EEF4FB}
  .nav-link.is-current::after{display:none}
  .nav-contact{margin:12px 0 0;border:1px solid var(--blue);justify-content:center;border-radius:4px}
  .nav-group.is-open .chev{transform:rotate(180deg)}
  .nav-sub{position:static;min-width:0;box-shadow:none;border:0;border-radius:0;background:var(--mist);padding:4px 8px 10px;margin-top:2px;opacity:1;visibility:visible;transform:none;display:none}
  .nav-group.is-open > .nav-sub{display:block}
  .nav-sub a{padding:9px 14px;font-size:14.5px}
  .header-tel{display:none}
  .hero{min-height:auto}
  .hero-inner{padding-top:64px;padding-bottom:52px}
  .hero-arcs > svg{width:130vw;right:-40%;top:38%;opacity:.32}
  .hero-window{display:none}
  .hero-copy{max-width:100%}
  .hero h1{font-size:clamp(34px,7.4vw,52px)}
  .hero-foot{flex-wrap:wrap;gap:10px 16px;font-size:12.5px}
  .hero-scroll{display:none}
  .svc,.process,.scenes,.contact{padding-top:76px;padding-bottom:78px}
  .bridge{padding:72px 0 78px}
  .svc-row{grid-template-columns:48px minmax(0,1fr) auto;gap:16px;padding:20px 4px 20px 0}
  .svc-row::before{left:-10px}
  .svc-mark{left:34px}
  .bridge-flow{grid-template-columns:repeat(2,1fr);gap:30px 12px;margin-top:48px}
  .bridge-line{display:none}
  .process-grid{grid-template-columns:1fr;gap:34px;margin-top:44px}
  .process-item p{max-width:36em}
  .scenes-inner{grid-template-columns:1fr;gap:28px;padding-top:44px}
  .contact-layout{grid-template-columns:1fr;gap:44px}
  .footer-top{grid-template-columns:repeat(2,1fr);gap:36px;padding-bottom:44px}
  .footer-brand{grid-column:1 / -1}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:560px){
  body{font-size:15.5px}
  .wrap{padding-left:18px;padding-right:18px}
  .brand img{width:106px}
  .hero-inner{padding-top:48px;padding-bottom:40px}
  .hero-line{font-size:13.5px;margin-bottom:16px}
  .hero h1{font-size:clamp(31px,8.4vw,42px);line-height:1.3}
  .hero-desc{margin-top:18px;font-size:15px;line-height:1.85}
  .hero-actions{gap:10px;margin-top:26px}
  .btn{min-height:46px;padding:0 18px;font-size:14px;flex:1 1 auto}
  .btn-lg{flex:0 0 auto;min-height:54px;padding:0 24px;font-size:17px}
  .hero-foot-sep{display:none}
  .hero-foot span:nth-child(3){display:none}
  .svc-intro h2{font-size:27px}
  .svc-lead{font-size:15px}
  .svc-tag{display:none}
  .svc-row{grid-template-columns:44px minmax(0,1fr);gap:14px;padding:18px 0}
  .svc-ico{width:42px;height:42px}
  .svc-ico .ico{width:20px;height:20px}
  .svc-mark{left:30px;top:10px}
  .svc-text h3{font-size:18px}
  .svc-text p{font-size:13.5px}
  .bridge-head h2{font-size:26px}
  .bridge-flow{gap:24px 8px}
  .bf-node{width:58px;height:58px}
  .bf-node .ico{width:24px;height:24px}
  .bf-text{font-size:13.5px}
  .scenes-tags li{padding:9px 16px;font-size:13.5px}
  .contact-copy h2{font-size:34px}
  .ci-row a{font-size:16px}
  .footer-top{grid-template-columns:1fr;gap:30px}
  .footer-brand{grid-column:auto}
  .footer-bottom{font-size:12px}
}

/* ── 尊重系统的减少动效设置 ───────────────────────── */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  html.js .rv,html.js .rise{animation:none!important;transition:none!important;opacity:1!important;transform:none!important}
  .hero-arcs{transform:none!important}
  .hero-copy{opacity:1!important}
}