/* ============================================================
   DOSOI 官网 · 交互与视觉原型（单文件 / 零外部依赖）
   VI：主色 #A9C2C0｜辅色 #595959
   英文标题 Copperplate Gothic Bold，正文 Inter / 思源黑体
   说明：本页所有内容均为版式示意。正式版由后台服务端渲染直出，
        保证搜索引擎与大模型抓到完整文本（见 00-项目基线与待确认事项.md）
   ============================================================ */
:root{
  --brand:#A9C2C0;
  --brand-soft:#e6efed;
  --ink:#595959;
  --ink-deep:#3c4243;
  --muted:#8a9391;
  --bg:#ffffff;
  --bg-soft:#f6f9f8;
  --line:#e4ebe9;
  --footer-bg:#22282a;
  --footer-text:#9aa4a2;
  --footer-line:#3a4243;
  --font-en:"Copperplate Gothic Bold","Copperplate","Georgia","Times New Roman",serif;
  --font-zh:Inter,"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --wrap:1240px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
html[data-theme="dark"]{
  --bg:#111719;
  --bg-soft:#182124;
  --ink:#cdd9d7;
  --ink-deep:#f0f6f5;
  --muted:#93a3a0;
  --line:#2b3739;
  --brand-soft:#22302f;
  --footer-bg:#0b0f10;
  --footer-text:#8d9997;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-zh);font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;transition:background .4s var(--ease),color .4s var(--ease)}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0 0 .6em;color:var(--ink-deep);line-height:1.3;font-weight:700}
p{margin:0 0 1em}
ul,ol,dl,dd{margin:0;padding:0}
li{list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:4px}
.wrap{width:min(var(--wrap),90vw);margin-inline:auto}
.en{font-family:var(--font-en);letter-spacing:.02em}
.eyebrow{display:inline-block;font-family:var(--font-en);font-size:.78rem;letter-spacing:.22em;color:var(--brand);margin-bottom:16px;text-transform:uppercase}
html[data-theme="dark"] .eyebrow{color:#cfe2df}
.section{padding:110px 0}
.section--soft{background:var(--bg-soft)}
.section-head h2{font-size:clamp(1.7rem,3vw,2.6rem)}
.lead{font-size:1.05rem;color:var(--muted);max-width:60ch}
.btn{display:inline-block;padding:11px 26px;border-radius:999px;font-size:.9rem;font-weight:600;border:1px solid transparent;transition:all .35s var(--ease)}
.btn--solid{background:var(--ink-deep);color:var(--bg)}
.btn--solid:hover{background:var(--brand);color:#333}
.btn--ghost{border-color:var(--line);color:var(--ink-deep)}
.btn--ghost:hover{border-color:var(--brand);background:var(--brand-soft)}
.btn--light{background:#fff;color:#3c4243}
.btn--light:hover{background:var(--brand);color:#fff}

/* ---------- ⑥ 透明页眉 + hover，滚动后毛玻璃 ---------- */
.site-header{position:fixed;inset:0 0 auto;z-index:60;background:transparent;transition:background .45s var(--ease),box-shadow .45s var(--ease),border-color .45s var(--ease);border-bottom:1px solid transparent}
.site-header.is-scrolled{background:rgba(255,255,255,.88);backdrop-filter:blur(14px);border-bottom-color:var(--line);box-shadow:0 6px 24px rgba(0,0,0,.05)}
.navbar{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:88px}
.brand{display:flex;flex-direction:column;line-height:1;color:var(--ink-deep);transition:opacity .3s var(--ease),transform .3s var(--ease)}
.brand:hover{opacity:.72;transform:translateY(-2px)}
.brand__mark{font-family:var(--font-en);font-size:1.65rem;letter-spacing:.14em}
.brand__sub{font-size:.55rem;letter-spacing:.32em;margin-top:6px;color:var(--muted)}
html[data-theme="dark"] .site-header.is-scrolled{background:rgba(17,23,25,.88)}
.nav-list{display:flex;gap:34px;align-items:center}
.nav-list a{position:relative;font-size:.9rem;font-weight:600;padding:8px 0;color:var(--ink);transition:color .3s var(--ease)}
.nav-list a::after{content:"";position:absolute;left:0;bottom:2px;width:0;height:1px;background:var(--brand);transition:width .35s var(--ease)}
.nav-list a:hover{color:var(--ink-deep)}
.nav-list a:hover::after{width:100%}
.nav-tools{display:flex;align-items:center;gap:10px}
.tool-btn{background:transparent;border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:.76rem;color:var(--ink);cursor:pointer;transition:all .3s var(--ease);font-family:var(--font-zh)}
.tool-btn:hover{border-color:var(--brand);background:var(--brand-soft);color:var(--ink-deep)}
.nav-toggle,.nav-icon{display:none}

/* ---------- ① Hero：静态背景 + 动态前景 ---------- */
.hero{position:relative;min-height:100vh;display:grid;place-items:center;text-align:center;overflow:hidden;isolation:isolate}
.hero__bg{position:absolute;inset:0;z-index:-3;background:
  radial-gradient(1200px 620px at 50% 18%,#cfe1de 0%,transparent 62%),
  linear-gradient(180deg,#eaf3f1 0%,#f8fbfa 58%,var(--bg) 100%)}
html[data-theme="dark"] .hero__bg{background:
  radial-gradient(1100px 600px at 50% 22%,#27403f 0%,transparent 64%),
  linear-gradient(180deg,#162326 0%,#111719 70%)}
/* 前景动态层：可后台替换为图片 / 视频 / 关闭 */
.hero__fg{position:absolute;inset:0;z-index:-2;pointer-events:none;opacity:.9}
.hero__fg span{position:absolute;display:block;border-radius:50%;border:1px solid rgba(169,194,192,.70);animation:drift 14s ease-in-out infinite}
.hero__fg span:nth-child(1){width:340px;height:340px;left:14%;top:46%;animation-delay:-2s}
.hero__fg span:nth-child(2){width:180px;height:180px;right:16%;top:30%;animation-delay:-6s}
.hero__fg span:nth-child(3){width:90px;height:90px;left:28%;top:22%;background:var(--brand-soft);border:0;animation-delay:-9s;animation-duration:18s}
.hero__fg span:nth-child(4){width:54px;height:54px;right:28%;bottom:22%;background:rgba(169,194,192,.55);border:0;animation-delay:-4s;animation-duration:11s}
.hero__fg i{position:absolute;left:50%;top:50%;width:min(46vw,520px);aspect-ratio:1;transform:translate(-50%,-46%);border-radius:50%;background:radial-gradient(circle,rgba(169,194,192,.26) 0%,transparent 68%);animation:breathe 9s ease-in-out infinite}
@keyframes drift{0%,100%{transform:translate3d(0,0,0) scale(1)}50%{transform:translate3d(18px,-26px,0) scale(1.05)}}
@keyframes breathe{0%,100%{opacity:.55;transform:translate(-50%,-46%) scale(1)}50%{opacity:1;transform:translate(-50%,-46%) scale(1.08)}}
.hero__inner{position:relative;z-index:1;padding:150px 0 110px}
.hero h1{font-family:var(--font-en);font-size:clamp(2rem,4.6vw,4.2rem);line-height:1.18;margin-bottom:22px;color:var(--ink-deep)}
.hero__cn{font-size:clamp(1.05rem,2vw,1.5rem);letter-spacing:.28em;color:var(--ink);margin-bottom:20px}
.hero__desc{font-size:1rem;color:var(--muted);max-width:52ch;margin:0 auto 34px}
.hero__scroll{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);font-size:.72rem;letter-spacing:.2em;color:var(--muted);animation:bob 2.6s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,8px)}}

/* ---------- ② 滚动到位时左右文字相互靠近 ---------- */
.approach{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.approach__left,.approach__right{transition:transform 1s var(--ease),opacity 1s var(--ease);opacity:0}
.approach__left{transform:translateX(calc(var(--slide,44px) * -1))}
.approach__right{transform:translateX(var(--slide,44px))}
.approach.is-visible .approach__left,.approach.is-visible .approach__right{transform:translateX(0);opacity:1}
.approach__left h2{font-size:clamp(1.9rem,3.4vw,3rem)}
.approach__right h3{font-size:1.18rem;font-family:var(--font-en);color:var(--ink-deep)}
.approach__right p{font-size:.95rem;color:var(--muted);max-width:52ch}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:76px;border-top:1px solid var(--line);padding-top:38px}
.stats div{text-align:center}
.stats dt{font-family:var(--font-en);font-size:clamp(1.8rem,3vw,2.6rem);color:var(--ink-deep);margin-bottom:6px}
.stats dd{font-size:.84rem;color:var(--muted)}

/* ---------- ③ 产品主推：图标 hover 放大 ---------- */
.feature{position:relative;overflow:hidden}
.feature__watermark{position:absolute;left:50%;top:44%;transform:translate(-50%,-50%);font-family:var(--font-en);font-size:clamp(5rem,15vw,15rem);color:rgba(169,194,192,.16);white-space:nowrap;pointer-events:none;user-select:none}
.feature__grid{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.feature__visual{aspect-ratio:4/3;border-radius:18px;background:linear-gradient(145deg,var(--brand-soft),var(--brand-soft));display:grid;place-items:center;transition:transform .6s var(--ease),box-shadow .6s var(--ease)}
.feature__visual:hover{transform:scale(1.04);box-shadow:0 30px 70px rgba(0,0,0,.10)}
.feature__visual span{font-family:var(--font-en);font-size:clamp(2rem,5vw,4rem);color:var(--ink-deep);opacity:.55}
.feature__spec{display:flex;gap:38px;margin-top:30px;flex-wrap:wrap}
.feature__spec div strong{display:block;font-family:var(--font-en);font-size:1.35rem;color:var(--ink-deep)}
.feature__spec div small{color:var(--muted);font-size:.8rem}
.icon-row{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:46px}
.icon-tile{border:1px solid var(--line);border-radius:12px;padding:20px 10px;text-align:center;font-size:.8rem;color:var(--muted);cursor:default;transition:transform .35s var(--ease),border-color .35s var(--ease),color .35s var(--ease),background .35s var(--ease)}
.icon-tile:hover{transform:scale(var(--hover-scale,1.09));border-color:var(--brand);background:var(--brand-soft);color:var(--ink-deep)}
.icon-tile b{display:block;font-size:1.4rem;font-weight:400;margin-bottom:8px;font-family:var(--font-en)}

/* ---------- 业务卡 hover 放大 ---------- */
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{position:relative;min-height:280px;border-radius:16px;overflow:hidden;padding:38px;background:linear-gradient(150deg,var(--brand-soft),var(--bg-soft));border:1px solid var(--line);transition:transform .5s var(--ease),box-shadow .5s var(--ease)}
.card:hover{transform:translateY(-6px) scale(1.012);box-shadow:0 26px 60px rgba(0,0,0,.09)}
.card__label{font-family:var(--font-en);font-size:.76rem;letter-spacing:.16em;color:var(--brand)}
html[data-theme="dark"] .card__label{color:#cfe2df}
.card h3{font-size:1.65rem;margin-top:16px}
.card__art{position:absolute;right:6%;top:18%;width:40%;aspect-ratio:1;border-radius:50%;border:1px solid rgba(169,194,192,.60);transition:transform .6s var(--ease)}
.card__art::after{content:"";position:absolute;inset:22%;border-radius:50%;background:rgba(169,194,192,.45)}
.card:hover .card__art{transform:scale(1.14) rotate(12deg)}
.card__more{position:absolute;left:38px;bottom:34px;font-size:.82rem;color:var(--ink-deep);border-bottom:1px solid var(--brand);padding-bottom:3px}

/* ---------- ④ 大图 + 下方图标 hover 切换 ---------- */
.showcase__frame{position:relative;height:min(56vw,520px);border-radius:18px;overflow:hidden;background:var(--bg-soft);border:1px solid var(--line)}
.showcase__pane{position:absolute;inset:0;opacity:0;transform:scale(1.04);transition:opacity var(--scene-fade,700ms) var(--ease),transform .9s var(--ease);display:grid;align-items:end;padding:48px}
.showcase__pane.is-active{opacity:1;transform:scale(1)}
.showcase__pane h3{font-size:clamp(1.6rem,3vw,2.5rem);color:#fff;text-shadow:0 2px 20px rgba(0,0,0,.4)}
.showcase__pane p{color:rgba(255,255,255,.86);max-width:44ch;font-size:.94rem;margin:0;text-shadow:0 2px 16px rgba(0,0,0,.35)}
.showcase__pane[data-scene="0"]{background:linear-gradient(120deg,#8fb3b0,#3d5c5a)}
.showcase__pane[data-scene="1"]{background:linear-gradient(120deg,#b6ccc9,#4d6b68)}
.showcase__pane[data-scene="2"]{background:linear-gradient(120deg,#9fbfc6,#3f5d66)}
.showcase__pane[data-scene="3"]{background:linear-gradient(120deg,#b9c7bd,#55665b)}
.showcase__pane[data-scene="4"]{background:linear-gradient(120deg,#a9c2c0,#435f66)}
.showcase__tabs{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:22px}
.scene-tab{border:0;background:transparent;border-bottom:1px solid var(--line);padding:16px 6px 14px;color:var(--muted);font-size:.84rem;cursor:pointer;font-family:var(--font-zh);transition:color .3s var(--ease),border-color .3s var(--ease),transform .3s var(--ease)}
.scene-tab b{display:block;font-family:var(--font-en);font-size:1.25rem;font-weight:400;margin-bottom:8px}
.scene-tab:hover,.scene-tab.is-active{color:var(--ink-deep);border-bottom-color:var(--brand);transform:translateY(-3px)}

/* ---------- 博客资讯 ---------- */
.news{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px}
.news article{border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:transform .4s var(--ease),box-shadow .4s var(--ease)}
.news article:hover{transform:translateY(-5px);box-shadow:0 20px 44px rgba(0,0,0,.07)}
.news__thumb{height:170px;background:linear-gradient(140deg,var(--brand-soft),var(--brand-soft))}
.news__body{padding:24px}
.news__body time{font-size:.76rem;color:var(--muted)}
.news__body h3{font-size:1.02rem;margin-top:10px}
.news__body p{font-size:.86rem;color:var(--muted);margin:0}
.section-head--row{display:flex;justify-content:space-between;align-items:end;gap:20px;flex-wrap:wrap}

/* ---------- ⑤ 深色页脚：浅灰字 hover 变白 ---------- */
.site-footer{background:var(--footer-bg);color:var(--footer-text);padding:76px 0 26px;font-size:.88rem}
.footer__grid{display:grid;grid-template-columns:1.4fr repeat(4,1fr);gap:40px}
.footer__brand .brand__mark{color:#fff}
.footer__brand p{margin-top:18px;max-width:30ch;color:var(--footer-text)}
.site-footer h4{color:#fff;font-size:.9rem;margin-bottom:16px;font-weight:600}
.site-footer li{margin-bottom:10px}
.site-footer a{color:var(--footer-text);transition:color .3s var(--ease),transform .3s var(--ease);display:inline-block}
.site-footer a:hover{color:#fff;transform:translateX(4px)}
.footer__bar{border-top:1px solid var(--footer-line);margin-top:56px;padding-top:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.78rem}
.footer__bar a{color:var(--footer-text)}
.footer__bar a:hover{color:#fff}

/* ---------- 通用渐显 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:16px;top:16px;background:#fff;padding:10px 16px;z-index:99}

@media (max-width:980px){
  .approach,.feature__grid{grid-template-columns:1fr;gap:36px}
  .cards,.news{grid-template-columns:repeat(2,1fr)}
  .icon-row,.showcase__tabs{grid-template-columns:repeat(3,1fr)}
  .footer__grid{grid-template-columns:repeat(3,1fr)}
  .stats{grid-template-columns:repeat(2,1fr);row-gap:28px}
}
@media (max-width:720px){
  .section{padding:68px 0}
  .nav-icon{display:block;background:transparent;border:1px solid var(--line);border-radius:8px;padding:8px 12px;font-size:.8rem;color:var(--ink);cursor:pointer}
  .nav-list{display:none;position:absolute;left:0;right:0;top:100%;background:var(--bg);border-bottom:1px solid var(--line);padding:14px 6vw 24px;flex-direction:column;align-items:stretch;gap:0}
  .nav-list li{border-bottom:1px solid var(--line)}
  .nav-list a{display:block;padding:12px 0}
  .nav-toggle:checked~.nav-list{display:flex}
  .nav-tools .btn{display:none}
  .cards,.news{grid-template-columns:1fr}
  .icon-row,.showcase__tabs{grid-template-columns:repeat(2,1fr)}
  .footer__grid{grid-template-columns:repeat(2,1fr)}
  .hero__fg span:nth-child(1),.hero__fg span:nth-child(2){display:none}
  .showcase__frame{height:66vw}
  .showcase__pane{padding:28px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .approach__left,.approach__right,.reveal{opacity:1!important;transform:none!important}
}

/* ============================================================
   内页扩展样式（首页 VI / 动效参数完全沿用原型，未改动）
   ============================================================ */
.page-hero{padding:168px 0 86px;text-align:center;border-bottom:1px solid var(--line);
  background:radial-gradient(900px 420px at 50% 0%,rgba(169,194,192,.22),transparent 70%)}
.page-hero h1{font-size:clamp(2rem,4vw,3.2rem);margin-bottom:14px}
.page-hero .lead{margin-inline:auto}
.breadcrumb{font-size:.8rem;color:var(--muted);margin-bottom:20px}
.breadcrumb a:hover{color:var(--ink-deep)}
.prose{max-width:74ch;font-size:1rem}
.prose p{color:var(--ink);margin-bottom:1.2em}
.prose h2{font-size:1.5rem;margin-top:2em}
.prose ul{margin:0 0 1.4em;padding-left:1.2em}
.prose li{list-style:disc;color:var(--ink);margin-bottom:.5em}
.tag{display:inline-block;font-size:.74rem;border:1px solid var(--line);border-radius:999px;padding:4px 12px;color:var(--muted);margin:0 6px 8px 0}
.tag.is-active{border-color:var(--brand);background:var(--brand-soft);color:var(--ink-deep)}

/* 业务详情 */
.service-block{border-top:1px solid var(--line);padding:58px 0;display:grid;grid-template-columns:200px 1fr;gap:52px;scroll-margin-top:90px}
.service-block:first-child{border-top:0;padding-top:0}
.service-block__no{font-family:var(--font-en);font-size:.8rem;letter-spacing:.18em;color:var(--brand)}
.service-block h2{font-size:1.7rem;margin:10px 0 16px}
.service-block .lead{margin-bottom:18px}
.deliverables{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:24px}
.deliverables div{background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;padding:16px 20px}
.deliverables h4{font-size:.8rem;color:var(--brand);margin:0 0 6px;letter-spacing:.08em}
.deliverables p{font-size:.88rem;margin:0;color:var(--ink)}
.toc{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.toc a{font-size:.84rem;border:1px solid var(--line);border-radius:999px;padding:7px 15px;transition:all .3s var(--ease)}
.toc a:hover{border-color:var(--brand);background:var(--brand-soft)}

/* 案例 / 文章 */
.works-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:36px}
.work-card{border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:transform .4s var(--ease),box-shadow .4s var(--ease)}
.work-card:hover{transform:translateY(-5px);box-shadow:0 20px 46px rgba(0,0,0,.07)}
.work-card__art{aspect-ratio:4/3;background:linear-gradient(140deg,var(--brand-soft),rgba(169,194,192,.32));display:grid;place-items:center;font-family:var(--font-en);font-size:2.4rem;color:var(--ink-deep);opacity:.75}
.work-card__body{padding:22px}
.work-card__body time{font-size:.76rem;color:var(--muted)}
.work-card__body h3{font-size:1.05rem;margin:10px 0 8px}
.work-card__body p{font-size:.86rem;color:var(--muted);margin:0}
.post-list{border-top:1px solid var(--line)}
.post-list article{display:grid;grid-template-columns:150px 1fr auto;gap:28px;align-items:center;padding:28px 0;border-bottom:1px solid var(--line);transition:background .3s var(--ease)}
.post-list article:hover{background:var(--bg-soft)}
.post-list time{font-size:.84rem;color:var(--muted)}
.post-list h3{font-size:1.12rem;margin:0 0 6px}
.post-list p{font-size:.88rem;color:var(--muted);margin:0}
.post-list .arrow{color:var(--brand);font-size:1.2rem}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}
.contact-card{border:1px solid var(--line);border-radius:14px;padding:28px;margin-bottom:16px;transition:transform .35s var(--ease),border-color .35s var(--ease)}
.contact-card:hover{transform:translateY(-3px);border-color:var(--brand)}
.contact-card h3{font-size:.86rem;color:var(--brand);margin-bottom:8px;letter-spacing:.06em}
.contact-card p{font-size:1.02rem;margin:0;color:var(--ink-deep)}
.form-box{background:var(--bg-soft);border:1px solid var(--line);border-radius:14px;padding:32px}
.form-box label{display:block;font-size:.84rem;color:var(--muted);margin:0 0 6px}
.form-box input,.form-box textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:11px 14px;font-family:var(--font-zh);font-size:.92rem;background:var(--bg);color:var(--ink);margin-bottom:18px}
.form-box textarea{min-height:110px;resize:vertical}
.form-box input:focus,.form-box textarea:focus{outline:none;border-color:var(--brand)}
.form-note{font-size:.8rem;color:var(--muted)}

/* FAQ */
.qa{border-top:1px solid var(--line)}
.qa__item{padding:24px 0;border-bottom:1px solid var(--line)}
.qa__item h3{font-size:1rem;margin-bottom:8px}
.qa__item h3::before{content:"问：";color:var(--brand)}
.qa__item p{margin:0;font-size:.94rem;color:var(--muted)}
.qa__item p::before{content:"答：";color:var(--ink-deep);font-weight:700}

/* 隐蔽管理入口：默认几乎不可见，hover/focus 才显现 */
.admin-entry{display:inline-block;margin-left:6px;color:transparent;font-size:.7rem;transition:color .35s var(--ease);border-bottom:0}
.admin-entry:hover,.admin-entry:focus{color:var(--footer-text)}

/* 事实块 */
.factbox{background:var(--bg-soft);border-left:3px solid var(--brand);border-radius:12px;padding:28px 32px}
.factbox dl{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 36px}
.factbox dt{font-size:.8rem;color:var(--muted)}
.factbox dd{font-weight:600;color:var(--ink-deep);margin-bottom:4px}
.page-nav{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:56px;padding-top:28px;border-top:1px solid var(--line);font-size:.88rem}

@media (max-width:980px){
  .service-block{grid-template-columns:1fr;gap:16px}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr;gap:34px}
  .post-list article{grid-template-columns:110px 1fr}
  .post-list .arrow{display:none}
}
@media (max-width:720px){
  .page-hero{padding:130px 0 60px}
  .works-grid,.deliverables,.factbox dl{grid-template-columns:1fr}
  .post-list article{grid-template-columns:1fr;gap:8px}
}

/* 允许后台文案里的换行按原样显示 */
.pre-line{white-space:pre-line}

/* 备案信息合规展示：ICP 号链接工信部；公安备案号审核通过后由后台填入才显示 */
.footer__certs{display:inline-flex;align-items:center;gap:6px;flex-wrap:wrap}
.police-item{display:inline-flex;align-items:center;gap:4px}
.police-item[hidden]{display:none}
.police-item svg{opacity:.75}

/* ============================================================
   2026-11-11 追加：官方 Logo / 深浅主题 / 业务流程大图 / 在线留言
   （VI 主色、辅色、字体与动效强度均沿用定稿原型，未改动）
   ============================================================ */

/* ---------- 两版官方横版 Logo：按主题自动切换 ---------- */
.brand{display:block}
.brand__logo{width:172px;height:auto;max-width:none;transition:opacity .3s var(--ease)}
.brand__logo--dark{display:none}
html[data-theme="dark"] .brand__logo--light{display:none}
html[data-theme="dark"] .brand__logo--dark{display:block}
.footer__logo{width:190px;height:auto;margin-bottom:4px;opacity:.95}
.footer__brand .brand__mark{color:#fff}

/* ---------- 首页业务流程大图（后台可替换，无图时回退到原渐变） ---------- */
.showcase__img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.showcase__pane::after{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(180deg,rgba(24,40,40,.05) 0%,rgba(24,40,40,.12) 46%,rgba(20,34,34,.68) 100%)}
.showcase__pane>div{position:relative;z-index:2}
.work-card__img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block}

/* ---------- 深浅主题补充（沿用定稿的深色变量，不新增色值体系） ---------- */
html[data-theme="dark"] .site-header{background:rgba(17,23,25,.72)}
html[data-theme="dark"] .skip-link:focus{background:var(--bg-soft);color:var(--ink-deep)}
html[data-theme="dark"] .hero__fg i{background:radial-gradient(circle,rgba(169,194,192,.18) 0%,transparent 68%)}
html[data-theme="dark"] .feature__watermark{color:rgba(169,194,192,.09)}
html[data-theme="dark"] .card__art{border-color:rgba(169,194,192,.35)}
html[data-theme="dark"] .card__art::after{background:rgba(169,194,192,.28)}
html[data-theme="dark"] .news__thumb{background:linear-gradient(140deg,#22302f,#2b3b3a)}
html[data-theme="dark"] .work-card__art{background:linear-gradient(140deg,#22302f,rgba(169,194,192,.18))}
html[data-theme="dark"] .tag{color:var(--muted)}
html[data-theme="dark"] .tool-btn{color:var(--ink)}
html[data-theme="dark"] .form-box input,html[data-theme="dark"] .form-box textarea{background:var(--bg);color:var(--ink-deep)}
html[data-theme="dark"] .msg-form input::placeholder,html[data-theme="dark"] .msg-form textarea::placeholder{color:var(--muted)}

/* ---------- 在线留言表单 ---------- */
.msg-form button[type=submit]{border:0;cursor:pointer;font-family:var(--font-zh)}
.msg-form button[type=submit]:disabled{opacity:.5;cursor:not-allowed}
.msg-form.is-disabled{opacity:.72}
.msg-form .hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;overflow:hidden}
.msg-status{font-size:.84rem;min-height:1.5em;margin:14px 0 0;color:var(--muted)}
.msg-status.is-ok{color:#3f7a68}
.msg-status.is-err{color:#a44a43}
.msg-status.is-warn{color:#8a6a3c}
.msg-status.is-wait{color:var(--brand)}

@media (max-width:720px){
  .brand__logo{width:132px}
  .footer__logo{width:168px}
  .nav-tools{gap:6px}
  .nav-tools .tool-btn{padding:5px 10px;font-size:.72rem}
  .showcase__pane{padding:24px}
}