:root{--feishu:#3370ff;--feishu-deep:#2657d6;--feishu-light:#e8f0ff;--blue-2:#5a9cff;
--bg:#f5f8ff;--card:#ffffff;--ink:#1f2a44;--ink-soft:#5b6b8c;--line:#e3e9f5;--white:#ffffff;
--glass:rgba(255,255,255,.72);--glass-brd:rgba(255,255,255,.65);--navy:#16203a;--red:#ff4d4f}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1120px;margin:0 auto;padding:0 28px}
.accent{color:var(--feishu)}
h1,h2,h3{line-height:1.2;font-weight:800}
h1{font-size:clamp(38px,5.6vw,60px)}
h2{font-size:clamp(26px,3.6vw,36px)}
h3{font-size:19px}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:3px;color:var(--feishu);font-weight:700;margin-bottom:12px}

/* ============ 顶部磨砂玻璃命令条 ============ */
.topbar{position:sticky;top:0;z-index:90;background:var(--glass);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.topbar-inner{display:flex;align-items:center;gap:22px;height:66px}
.brand{display:flex;align-items:center;gap:10px}
.brand .brand-mark{width:32px;height:32px;border-radius:8px}
.brand-word{font-size:19px;font-weight:800;color:var(--ink)}
.mainnav{display:flex;gap:2px;margin-left:auto}
.nav-link{position:relative;padding:8px 13px;font-size:15px;font-weight:600;color:var(--ink-soft);border-radius:10px;transition:.2s}
.nav-link:hover{color:var(--feishu);background:var(--feishu-light)}
.nav-link.on{color:var(--feishu)}
.nav-link.on::after{content:"";position:absolute;left:13px;right:13px;bottom:1px;height:3px;border-radius:2px;background:var(--feishu)}
.nav-cta{background:var(--feishu);color:#fff;padding:9px 20px;border-radius:999px;font-size:14px;font-weight:700;transition:.2s;box-shadow:0 6px 16px rgba(51,112,255,.3)}
.nav-cta:hover{background:var(--feishu-deep);transform:translateY(-1px)}

/* ============ 首页 hero:全屏虚化照片 + 磨砂玻璃卡 ============ */
.hero{position:relative;min-height:92vh;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:120px 0 90px}
.hero::before{content:"";position:absolute;inset:-28px;background:url(../images/collab-hero.jpg) center/cover;filter:blur(18px) brightness(.52) saturate(1.05);transform:scale(1.08)}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(22,32,58,.35),rgba(22,32,58,.62))}
.hero-deco{position:absolute;pointer-events:none;z-index:1;opacity:.5;filter:drop-shadow(0 6px 20px rgba(51,112,255,.35))}
.hero-deco.feather-a{left:5%;top:24px;width:150px;transform:rotate(-16deg)}
.hero-deco.feather-b{right:5%;bottom:8px;width:130px;transform:rotate(16deg) scaleX(-1)}
.hero-deco svg{width:100%;height:auto}
.hero-inner{position:relative;z-index:3;max-width:820px;text-align:center}
.glass-card{background:var(--glass);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);border:1px solid var(--glass-brd);border-radius:26px;padding:50px 46px;box-shadow:0 28px 70px rgba(22,32,58,.28)}
.hero-title{margin-bottom:16px}
.hero-sub{font-size:17px;color:var(--ink-soft);max-width:600px;margin:0 auto 28px}
.hero-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-bottom:8px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:15px 32px;border-radius:999px;font-size:16px;font-weight:700;letter-spacing:.5px;transition:.2s;border:1px solid transparent}
.btn-primary{background:linear-gradient(135deg,#3370ff,#5a9cff);color:#fff;box-shadow:0 10px 26px rgba(51,112,255,.38)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(51,112,255,.44)}
.btn-ghost{background:rgba(255,255,255,.7);color:var(--feishu-deep);border-color:var(--feishu);backdrop-filter:blur(8px)}
.btn-ghost:hover{background:#fff;transform:translateY(-2px)}
.hero-chips{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin-top:22px}
.chip{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.6);border:1px solid var(--line);padding:9px 16px;border-radius:999px;font-size:13.5px;font-weight:600;color:var(--ink);transition:.2s;backdrop-filter:blur(8px)}
.chip:hover{background:#fff;border-color:var(--blue-2);transform:translateY(-2px)}
.chip .ci{font-size:16px;line-height:1}
.hero-live{display:inline-flex;align-items:center;gap:9px;margin-top:24px;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);color:var(--ink);padding:9px 18px;border-radius:999px;font-size:13px;font-weight:600;box-shadow:0 10px 26px rgba(22,32,58,.2)}
.hero-live .dot{width:9px;height:9px;border-radius:50%;background:var(--red);box-shadow:0 0 0 4px rgba(255,77,79,.18);animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

/* ============ section ============ */
.section{padding:80px 0}
.section.alt{background:linear-gradient(180deg,#eef4ff,#f5f8ff)}
.section-head{max-width:700px;margin:0 auto 52px;text-align:center}
.section-head h2{margin-bottom:12px}
.section-head p{color:var(--ink-soft);margin-top:12px}
.section-head::after{content:"";display:block;width:58px;height:4px;margin:20px auto 0;background:linear-gradient(90deg,#3370ff,#5a9cff);border-radius:2px}
.section-foot{text-align:center;margin-top:38px}

/* ============ 拼贴功能舱 collage(替换 bento) ============ */
.collage{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:172px;gap:18px;grid-auto-flow:dense}
.gtile{position:relative;border-radius:18px;overflow:hidden;background:var(--glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid var(--glass-brd);box-shadow:0 8px 24px rgba(31,42,68,.07);padding:22px;display:flex;flex-direction:column;justify-content:flex-end;transition:.25s}
.gtile:hover{transform:translateY(-5px);box-shadow:0 20px 44px rgba(51,112,255,.18)}
.gtile .g-ico{font-size:30px;margin-bottom:10px}
.gtile h3{font-size:18px;margin-bottom:5px}
.gtile p{font-size:13px;color:var(--ink-soft);line-height:1.6}
.gtile.w2{grid-column:span 2}
.gtile.h2{grid-row:span 2}
.gtile.photo{background-size:cover;background-position:center}
.gtile.photo::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(22,32,58,.02),rgba(22,32,58,.74))}
.gtile.photo .cap{position:absolute;z-index:2;left:18px;right:18px;bottom:16px}
.gtile.photo .cap h3{color:#fff}
.gtile.photo .cap p{color:rgba(255,255,255,.88)}

/* ============ 大图虚化 + 玻璃侧板 ============ */
.blursect{position:relative;overflow:hidden;padding:96px 0}
.blursect::before{content:"";position:absolute;inset:-26px;background:url(../images/remote-work.jpg) center/cover;filter:blur(18px) brightness(.52);transform:scale(1.06)}
.blursect::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(22,32,58,.62),rgba(22,32,58,.1))}
.blursect .wrap{position:relative;z-index:2}
.glass-panel{background:var(--glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--glass-brd);border-radius:20px;padding:42px;max-width:540px;box-shadow:0 24px 60px rgba(22,32,58,.25)}
.glass-panel h2{margin-bottom:14px}
.glass-panel p{color:var(--ink-soft);margin-bottom:12px}
.checklist{list-style:none;margin:18px 0 24px}
.checklist li{padding:7px 0 7px 30px;position:relative;color:var(--ink)}
.checklist li::before{content:"✓";position:absolute;left:0;top:5px;width:20px;height:20px;border-radius:50%;background:var(--feishu);color:#fff;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center}

/* ============ 协作消息流 chat ============ */
.chat{max-width:760px;margin:0 auto;background:var(--glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--glass-brd);border-radius:22px;overflow:hidden;box-shadow:0 18px 44px rgba(31,42,68,.12)}
.chat-head{display:flex;align-items:center;gap:12px;padding:16px 22px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.55)}
.chat-head .av{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,#5a9cff,#3370ff);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px}
.chat-head .nm{font-weight:700;font-size:15px}
.chat-head .st{font-size:12px;color:var(--ink-soft)}
.chat-body{padding:24px;display:flex;flex-direction:column;gap:14px}
.msg{max-width:74%;padding:12px 16px;border-radius:16px;font-size:14.5px;line-height:1.65}
.msg.me{align-self:flex-end;background:linear-gradient(135deg,#3370ff,#5a9cff);color:#fff;border-bottom-right-radius:5px}
.msg.other{align-self:flex-start;background:#fff;border:1px solid var(--line);color:var(--ink);border-bottom-left-radius:5px}
.msg .who{display:block;font-size:12px;opacity:.75;margin-bottom:3px}
.chat-typing{padding:13px 22px;border-top:1px solid var(--line);color:var(--ink-soft);font-size:13px;display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.4)}
.chat-typing .b{width:7px;height:7px;border-radius:50%;background:var(--blue-2);animation:pulse 1.2s infinite}
.chat-typing .b:nth-child(2){animation-delay:.2s}
.chat-typing .b:nth-child(3){animation-delay:.4s}

/* ============ 看板三列 kanban(替换 steps) ============ */
.kanban{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.kcol{background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-brd);border-radius:18px;padding:18px;box-shadow:0 8px 22px rgba(31,42,68,.06)}
.kcol h3{font-size:14px;letter-spacing:1px;color:var(--ink-soft);margin-bottom:14px;display:flex;align-items:center;gap:9px}
.kcol h3 .dot{width:9px;height:9px;border-radius:50%}
.kcol h3 .dot.g{background:#2ecc71}
.kcol h3 .dot.b{background:var(--feishu)}
.kcol h3 .dot.gy{background:#aab3c5}
.kcard{background:#fff;border:1px solid var(--line);border-radius:13px;padding:13px 15px;margin-bottom:12px;font-size:14px;box-shadow:0 2px 8px rgba(31,42,68,.05)}
.kcard .tag{display:inline-block;font-size:11px;padding:2px 9px;border-radius:999px;background:var(--feishu-light);color:var(--feishu-deep);margin-bottom:7px;font-weight:600}

/* ============ 视频会议拼贴 meeting ============ */
.meeting{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.mtile{position:relative;border-radius:16px;overflow:hidden;aspect-ratio:1/1;background-size:cover;background-position:center}
.mtile::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(22,32,58,.02),rgba(22,32,58,.62))}
.mtile .nm{position:absolute;left:12px;bottom:10px;z-index:2;color:#fff;font-size:13px;font-weight:600}
.mtile .mic{position:absolute;top:10px;right:10px;z-index:2;background:rgba(22,32,58,.55);color:#fff;width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px}
.meetbar{display:flex;justify-content:center;gap:14px;margin-top:24px;flex-wrap:wrap}
.mbtn{width:54px;height:54px;border-radius:50%;background:var(--glass);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:21px;color:var(--ink);transition:.2s;box-shadow:0 6px 16px rgba(31,42,68,.08)}
.mbtn:hover{background:#fff;transform:translateY(-3px)}
.mbtn.end{background:var(--red);color:#fff;border-color:var(--red)}

/* ============ bento(矩阵/关于页仍用,玻璃化) ============ */
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.people-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.bento-card{background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-brd);border-radius:18px;padding:28px 24px;transition:.22s;box-shadow:0 6px 18px rgba(31,42,68,.06)}
.bento-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(51,112,255,.16);border-color:var(--blue-2)}
.bento-ico{font-size:30px;margin-bottom:12px}
.bento-card h3{margin-bottom:8px}
.bento-card p{font-size:14px;color:var(--ink-soft)}

/* ============ split ============ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.split.rev .split-media{order:-1}
.split-copy h2{margin-bottom:16px}
.split-copy h3{margin:18px 0 6px}
.split-copy p{color:var(--ink-soft);margin-bottom:12px}
.media-frame{border-radius:18px;overflow:hidden;box-shadow:0 20px 48px rgba(31,42,68,.16)}
.media-frame img{width:100%;height:320px;object-fit:cover}
.terrace-frame{background:var(--glass);border:1px solid var(--glass-brd);border-radius:18px;padding:24px;backdrop-filter:blur(12px)}
.terrace-frame svg{width:100%;height:auto}

/* ============ steps(下载页用,玻璃化) ============ */
.steps{max-width:640px;margin:0 auto;display:flex;flex-direction:column}
.step{display:flex;gap:20px;position:relative;padding-bottom:30px}
.step:not(:last-child)::before{content:"";position:absolute;left:22px;top:50px;bottom:0;width:2px;background:var(--line)}
.step-num{flex:0 0 46px;height:46px;border-radius:50%;background:linear-gradient(135deg,#3370ff,#5a9cff);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;box-shadow:0 8px 18px rgba(51,112,255,.34)}
.step-body h3{margin-bottom:4px}
.step-body p{color:var(--ink-soft);font-size:14px}

/* ============ faq ============ */
.faq{max-width:780px;margin:0 auto}
.reviews-sec{background:var(--bg-2)}
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review-card{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:24px;box-shadow:0 12px 32px rgba(0,0,0,.35)}
.review-card .stars{color:#f5a623;font-size:16px;letter-spacing:2px;margin-bottom:12px}
.review-card p{color:var(--ink-soft);font-size:15px;line-height:1.7}
.rv-meta{margin-top:16px;display:flex;align-items:center;gap:10px}
.rv-meta strong{font-size:14px}
.rv-meta span{font-size:12px;color:var(--ink-soft);background:var(--bg-2);padding:3px 10px;border-radius:12px}
.faq-item{background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-brd);border-radius:16px;margin-bottom:12px;overflow:hidden;box-shadow:0 4px 14px rgba(31,42,68,.05)}
.faq-item summary{padding:19px 24px;font-weight:600;cursor:pointer;list-style:none;position:relative}
.faq-item summary::after{content:"+";position:absolute;right:22px;top:10px;font-size:26px;color:var(--feishu);transition:.2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 24px 22px;color:var(--ink-soft);font-size:14px}

/* ============ platform ============ */
.platform-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.platform-card{background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-brd);border-radius:16px;overflow:hidden;display:block;transition:.22s;box-shadow:0 6px 18px rgba(31,42,68,.06)}
.platform-card:hover{transform:translateY(-5px);box-shadow:0 16px 36px rgba(51,112,255,.18)}
.platform-top{height:5px;background:linear-gradient(135deg,#3370ff,#5a9cff)}
.platform-body{padding:20px 18px}
.platform-ico{font-size:24px}
.platform-body h3{margin:10px 0 4px;font-size:17px}
.platform-body p{font-size:13px;color:var(--ink-soft);margin-bottom:10px}
.platform-link{color:var(--feishu);font-size:13px;font-weight:700}

/* ============ table ============ */
.table-wrap{overflow-x:auto;background:var(--glass);backdrop-filter:blur(12px);border:1px solid var(--glass-brd);border-radius:16px;box-shadow:0 8px 22px rgba(31,42,68,.06)}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:520px}
th,td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line)}
thead th{background:linear-gradient(135deg,#3370ff,#5a9cff);color:#fff;font-weight:600}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:rgba(255,255,255,.7)}

/* ============ tip ============ */
.tip{background:rgba(232,240,255,.8);backdrop-filter:blur(8px);border-left:4px solid var(--feishu);padding:16px 20px;border-radius:12px;font-size:14px;color:var(--ink);margin-top:20px}

/* ============ page-hero(内页,虚化照片浅底) ============ */
.page-hero{position:relative;overflow:hidden;padding:74px 0 62px}
.page-hero::before{content:"";position:absolute;inset:-20px;background:url(../images/open-office.jpg) center/cover;filter:blur(14px)}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(232,240,255,.92),rgba(255,255,255,.84))}
.page-hero .wrap{position:relative;z-index:2}
.page-hero h1{font-size:clamp(30px,4.4vw,48px);margin:4px 0 14px}
.page-sub{font-size:16px;color:var(--ink-soft);max-width:640px}
.page-hero .hero-actions{margin:22px 0 0;justify-content:flex-start}
.breadcrumb{display:flex;gap:8px;flex-wrap:wrap;font-size:13px;margin-bottom:20px}
.crumb a{color:var(--ink-soft);border-bottom:1px dotted var(--blue-2)}
.crumb a:hover{color:var(--feishu)}
.crumb+.crumb::before{content:"/";margin-right:8px;opacity:.4}
.crumb{color:var(--ink-soft)}

/* ============ article ============ */
.article-hero{position:relative;overflow:hidden;padding:64px 0 48px}
.article-hero::before{content:"";position:absolute;inset:-20px;background:url(../images/desk-notebook.jpg) center/cover;filter:blur(14px)}
.article-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(232,240,255,.93),rgba(255,255,255,.85))}
.article-hero .wrap{position:relative;z-index:2}
.article-hero h1{font-size:clamp(27px,3.7vw,40px);margin:8px 0 14px;max-width:840px}
.article-meta{font-size:13px;color:var(--ink-soft);letter-spacing:1px}
.article-layout{display:grid;grid-template-columns:230px 1fr;gap:44px;padding:48px 0 64px;align-items:start}
.toc{position:sticky;top:86px;background:var(--glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--glass-brd);border-radius:16px;padding:20px}
.toc h4{font-size:12px;color:var(--feishu);letter-spacing:2px;margin-bottom:14px}
.toc a{display:block;font-size:13px;color:var(--ink);padding:7px 0 7px 14px;border-left:2px solid var(--line);transition:.2s}
.toc a:hover{color:var(--feishu);border-color:var(--feishu)}
.article-body{max-width:720px}
.article-body h2{font-size:24px;margin:34px 0 14px;padding-left:14px;border-left:4px solid var(--feishu)}
.article-body h3{font-size:18px;margin:26px 0 10px}
.article-body p{margin-bottom:16px;color:var(--ink)}
.article-body ul,.article-body ol{margin:0 0 18px 24px}
.article-body li{margin-bottom:8px}
.article-body img{border-radius:14px;margin:20px 0}
.article-body .lead{font-size:18px;color:var(--feishu-deep);font-weight:500}
.related{border-top:1px solid var(--line);margin-top:40px;padding-top:30px}
.related h3{margin-bottom:16px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.related-card{background:var(--glass);border:1px solid var(--glass-brd);border-radius:14px;padding:16px;font-size:14px;backdrop-filter:blur(10px)}
.related-card:hover{border-color:var(--feishu)}
.related-card span{color:var(--feishu);font-weight:700}

/* ============ search ============ */
.search-box{max-width:520px;margin:26px 0 0;display:flex;gap:10px}
.search-input{flex:1;padding:14px 20px;border-radius:999px;border:1px solid var(--line);font-size:15px;outline:none;background:var(--glass);backdrop-filter:blur(8px)}
.search-input:focus{border-color:var(--feishu)}
.search-btn{background:linear-gradient(135deg,#3370ff,#5a9cff);color:#fff;border:none;padding:0 28px;border-radius:999px;font-size:15px;font-weight:700;cursor:pointer}
.search-results{max-width:640px;margin:30px 0 0}
.search-results .hit{background:var(--glass);border:1px solid var(--glass-brd);border-radius:12px;padding:14px 18px;margin-bottom:10px;backdrop-filter:blur(8px)}
.search-results .hit a{color:var(--feishu);font-weight:600}

/* ============ sitemap ============ */
.sitegroup{margin-bottom:34px}
.sitegroup h2{font-size:20px;margin-bottom:14px;color:var(--feishu-deep)}
.sitegroup ul{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.sitegroup li a{color:var(--ink);font-size:14px;border-bottom:1px dotted var(--line);display:inline-block;padding-bottom:2px}
.sitegroup li a:hover{color:var(--feishu)}

/* ============ share ============ */
.share{display:flex;gap:14px;align-items:center;font-size:13px;margin:24px 0 0;color:var(--ink-soft)}
.share a{color:var(--feishu);border-bottom:1px dotted var(--feishu)}

/* ============ final cta:虚化照片 + 玻璃卡 ============ */
.final-cta{position:relative;overflow:hidden;padding:96px 0;text-align:center}
.final-cta::before{content:"";position:absolute;inset:-26px;background:url(../images/office-team.jpg) center/cover;filter:blur(18px) brightness(.48);transform:scale(1.06)}
.final-cta::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(22,32,58,.45),rgba(38,87,214,.35))}
.final-cta .wrap{position:relative;z-index:2}
.cta-inner{max-width:640px;margin:0 auto;background:var(--glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--glass-brd);border-radius:24px;padding:46px 40px;box-shadow:0 28px 66px rgba(22,32,58,.28)}
.final-cta h2{color:var(--ink);margin-bottom:12px}
.final-cta p{color:var(--ink-soft);margin-bottom:26px}
.final-cta .btn-primary{box-shadow:0 10px 26px rgba(51,112,255,.4)}

/* ============ footer:磨砂深色 + 全球时区条 ============ */
.sitefoot{background:var(--navy);color:#b9c4de;font-size:14px}
.global-strip{display:flex;justify-content:center;flex-wrap:wrap;gap:22px;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.08);font-size:12px;color:#8aa0c8;letter-spacing:1px}
.global-strip span{display:inline-flex;align-items:center;gap:7px}
.global-strip .gdot{width:7px;height:7px;border-radius:50%;background:var(--blue-2)}
.footgrid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding:56px 28px 44px}
.foot-brand{display:flex;flex-direction:column;align-items:flex-start;gap:8px}
.foot-logo .brand-mark{width:44px;height:44px;border-radius:10px}
.foot-title{font-size:20px;font-weight:800;color:#fff}
.foot-sub{font-size:12px;letter-spacing:2px;color:#8aa0c8}
.foot-desc{font-size:13px;color:#8aa0c8;margin-top:6px;max-width:260px;line-height:1.7}
.foot-col{display:flex;flex-direction:column;gap:10px}
.foot-col h4{font-size:13px;color:#fff;letter-spacing:1px;margin-bottom:4px}
.foot-col a{color:#b9c4de;font-size:14px;transition:.2s}
.foot-col a:hover{color:#5a9cff}
.foot-copy{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;text-align:center;color:#8aa0c8;font-size:12.5px}

/* ============ backtop ============ */
.backtop{position:fixed;right:26px;bottom:26px;width:46px;height:46px;border-radius:50%;border:none;background:var(--feishu);color:#fff;font-size:20px;cursor:pointer;display:none;z-index:80;box-shadow:0 8px 20px rgba(51,112,255,.4)}
.backtop:hover{background:var(--feishu-deep)}

/* ============ 响应式 ============ */
@media(max-width:920px){
.topbar-inner{gap:12px}
.mainnav{gap:2px;overflow-x:auto}
.nav-link{padding:8px 9px;font-size:14px}
.nav-cta{padding:8px 15px}
.hero{padding:96px 0 70px}
.hero-deco.feather-a,.hero-deco.feather-b{width:80px;opacity:.35}
.glass-card{padding:36px 26px}
.collage{grid-template-columns:repeat(2,1fr);grid-auto-rows:150px}
.gtile.w2{grid-column:span 2}
.kanban{grid-template-columns:1fr}
.meeting{grid-template-columns:repeat(2,1fr)}
.bento{grid-template-columns:repeat(2,1fr)}
.people-row{grid-template-columns:repeat(2,1fr)}
.platform-grid{grid-template-columns:repeat(2,1fr)}
.split,.split.rev{grid-template-columns:1fr;gap:30px}
.split.rev .split-media{order:0}
.article-layout{grid-template-columns:1fr}
.toc{position:static}
.related-grid{grid-template-columns:1fr}
.sitegroup ul{grid-template-columns:1fr}
.footgrid{grid-template-columns:1fr 1fr;gap:30px}
}