:root{--navy:#073a66;--deep:#062f53;--ink:#17394f;--muted:#6e808b;--line:#dce3e7;--soft:#f4f6f6;--gold:#af9159;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:"Microsoft YaHei UI","PingFang SC",Arial,sans-serif}a{text-decoration:none;color:inherit}.wrap{width:min(var(--max),calc(100% - 46px));margin:auto}.top{height:36px;background:var(--navy);color:#fff;font-size:10px}.top .wrap,.head{height:100%;display:flex;align-items:center;justify-content:space-between}.tiny,.nav{display:flex;align-items:center;gap:19px}.tiny i{width:1px;height:12px;background:rgba(255,255,255,.4)}header{height:76px;border-bottom:1px solid var(--line);background:#fff}.brand{display:flex;align-items:center;gap:10px}.char{font:30px "Songti SC",serif;color:var(--navy)}.brand b{font:700 18px "Songti SC",serif;letter-spacing:.16em}.brand small{display:block;font:7px Georgia,serif;letter-spacing:.15em;color:#728592}.nav{gap:25px;font-size:12px}.nav a{padding:29px 0 25px;border-bottom:3px solid transparent}.nav a:hover,.nav a.active{border-color:var(--navy)}.nav .contact{background:var(--navy);color:#fff;padding:11px 15px;border:0}.mast{height:365px;position:relative;isolation:isolate;color:#fff;background:#527080}.mast:before{content:"";position:absolute;inset:0;z-index:-2;background:linear-gradient(90deg,rgba(3,35,55,.72),rgba(3,35,55,.16)),var(--hero) center/cover}.mast:after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,transparent 50%,rgba(3,31,48,.4))}.mast .wrap{height:100%;display:flex;align-items:center}.mast-copy{max-width:700px}.eyebrow{font:10px Georgia,serif;letter-spacing:.17em;color:#dbc497;text-transform:uppercase}.mast h1{font:600 48px/1.15 Georgia,"Songti SC",serif;margin:15px 0}.mast p{font-size:14px;line-height:1.85;max-width:640px;color:rgba(255,255,255,.9)}.concept{position:absolute;right:15px;bottom:10px;font-size:8px;opacity:.7}.crumb{height:48px;background:var(--navy);color:#fff}.crumb .wrap{height:100%;display:flex;align-items:center;gap:25px;font-size:10px}.crumb a{opacity:.74}.crumb b{font-weight:500}section{padding:72px 0}.soft{background:var(--soft)}.section-head{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:end}.title{font:600 34px/1.25 Georgia,"Songti SC",serif;color:var(--navy);margin:10px 0}.lead{font-size:13px;line-height:1.9;color:var(--muted);margin:0}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:33px}.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:33px}.card{border:1px solid var(--line);background:#fff;padding:24px;min-height:180px}.card small{font:10px Georgia,serif;color:var(--gold)}.card h3{font-size:17px;margin:13px 0 8px}.card p{font-size:11px;line-height:1.75;color:var(--muted)}.card a,.button{display:inline-flex;background:var(--navy);color:#fff;padding:11px 15px;font-size:10px;margin-top:9px}.photo-card{padding:0}.photo{height:185px;background:var(--photo) center/cover;position:relative}.photo-card .body{padding:20px}.split{display:grid;grid-template-columns:1fr 1fr;min-height:360px}.split-photo{background:var(--split) center/cover}.split-copy{padding:50px 60px;display:flex;flex-direction:column;justify-content:center}.split-copy ul{padding-left:18px;font-size:12px;line-height:2;color:#516a79}.answer{border-left:4px solid var(--gold);padding:22px 25px;background:#fff;margin-top:30px}.answer small{font:10px Georgia,serif;color:var(--gold)}.answer p{font-size:15px;line-height:1.85;margin:8px 0 0}.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);margin-top:34px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.step{padding:25px;border-right:1px solid var(--line)}.step:last-child{border:0}.step:before{counter-increment:s;content:"0" counter(s);font:12px Georgia,serif;color:var(--gold)}.step h3{font-size:14px}.step p{font-size:10px;line-height:1.7;color:var(--muted)}.faq{max-width:900px;margin:28px auto 0}.faq details{border-bottom:1px solid var(--line)}.faq summary{padding:17px 0;font-size:12px;font-weight:650;cursor:pointer;list-style:none;display:flex;justify-content:space-between}.faq summary:after{content:"＋"}.faq details[open] summary:after{content:"－"}.faq p{font-size:11px;line-height:1.85;color:var(--muted);margin:0 0 18px}.cta{background:var(--navy);color:#fff;text-align:center;padding:55px 20px}.cta h2{font:600 30px Georgia,"Songti SC",serif;margin:0 0 10px}.cta p{font-size:12px;color:#c8d6df}.cta .button{background:#fff;color:var(--navy);font-weight:700}.page-links{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.page-link{border:1px solid var(--line);padding:19px;background:#fff}.page-link small{font:9px Georgia,serif;color:var(--gold)}.page-link h3{font-size:15px;margin:8px 0}.page-link p{font-size:10px;color:var(--muted);line-height:1.65}footer{background:#f4f5f4;border-top:1px solid var(--line);padding:35px 0}.footer{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:38px}.footer h4{font-size:10px}.footer a,.footer p{display:block;font-size:9px;color:#71838d;line-height:2;margin:0}.copy{border-top:1px solid var(--line);margin-top:24px;padding-top:17px;font-size:8px;color:#84929a}.center{text-align:center}.center .lead{max-width:720px;margin:auto}@media(max-width:900px){.nav a:not(.contact){display:none}.section-head,.split{grid-template-columns:1fr}.grid4{grid-template-columns:1fr 1fr}.split-photo{min-height:300px}.steps{grid-template-columns:1fr 1fr}.step:nth-child(2){border-right:0}.step:nth-child(-n+2){border-bottom:1px solid var(--line)}.footer{grid-template-columns:1fr 1fr}}@media(max-width:600px){.wrap{width:calc(100% - 26px)}.tiny a:nth-child(n+2),.tiny i{display:none}header{height:68px}.mast{height:420px}.mast h1{font-size:38px}.grid3,.grid4,.page-links{grid-template-columns:1fr}.split-copy{padding:38px 24px}.steps{grid-template-columns:1fr}.step{border-right:0;border-bottom:1px solid var(--line)!important}.section-head{gap:12px}.title{font-size:29px}.footer{grid-template-columns:1fr 1fr;gap:25px}}


/* TEC-TYPOGRAPHY-V2 */
:root{
  --font-sans:Avenir,"Avenir Next","Helvetica Neue","Noto Sans SC","PingFang SC","Microsoft YaHei UI","Microsoft YaHei",Arial,sans-serif;
  --font-display:Butler,"Times New Roman",Georgia,"Songti SC","STSong",SimSun,serif;
}
body{font-family:var(--font-sans);font-size:14px;font-weight:400;letter-spacing:.005em;-webkit-font-smoothing:antialiased}
.top{font-size:12px;font-weight:400;letter-spacing:.01em}
.brand .char{font-family:var(--font-display);font-size:34px;font-weight:400;line-height:1}
.brand b{font-family:var(--font-display);font-size:20px;font-weight:700;letter-spacing:.13em}
.brand small{font-family:var(--font-sans);font-size:8px;font-weight:500;letter-spacing:.18em}
.nav{gap:16px;font-size:14px;font-weight:400;letter-spacing:0;white-space:nowrap}
.nav a{padding:28px 0 24px}
.nav .contact{font-weight:500;padding:12px 14px}
.eyebrow{font-family:var(--font-sans);font-size:11px;font-weight:600;line-height:1.6;letter-spacing:.18em}
.mast-copy{max-width:820px}
.mast h1{font-family:var(--font-display);font-size:54px;line-height:1.18;font-weight:700;letter-spacing:0;margin:16px 0 18px}
.mast p{font-size:15px;line-height:1.9;font-weight:400;max-width:700px}
.crumb .wrap{font-size:12px}
.title{font-family:var(--font-display);font-size:38px;line-height:1.28;font-weight:700;letter-spacing:0}
.lead{font-size:14px;line-height:2}
.card small,.answer small,.page-link small,.step:before{font-family:var(--font-sans);font-weight:600;letter-spacing:.08em}
.card h3{font-size:17px;line-height:1.5;font-weight:600}
.card p{font-size:13px;line-height:1.85}
.split-copy ul{font-size:13px;line-height:2.05}
.answer p{font-family:var(--font-display);font-size:18px;line-height:1.85;font-weight:600}
.step h3{font-size:15px;line-height:1.5;font-weight:600}
.step p{font-size:12px;line-height:1.8}
.faq summary{font-size:14px;line-height:1.65;font-weight:600}
.faq p{font-size:13px;line-height:1.9}
.cta h2{font-family:var(--font-display);font-size:34px;line-height:1.3;font-weight:700}
.cta p{font-size:13px;line-height:1.8}
.page-link h3{font-size:16px;line-height:1.5;font-weight:600}
.page-link p{font-size:12px;line-height:1.8}
.footer h4{font-size:12px;font-weight:600}
.footer a,.footer p{font-size:11px;line-height:2}
@media(max-width:600px){
  .mast h1{font-size:42px;line-height:1.2}
  .title{font-size:31px;line-height:1.3}
}
/* TEC-STRUCTURE-V4 */
:root{--max:1360px;--navy:#003b6f;--deep:#002f59;--ink:#18364b;--muted:#596d79;--line:#d9e1e6;--soft:#f5f6f6;--gold:#b59660}
body{font-family:var(--font-sans);font-size:14px;color:var(--ink);background:#fff}
.wrap{width:min(var(--max),calc(100% - 80px))}
.top{height:40px;font-size:12px;background:var(--navy)}
.tiny .lang{opacity:.7}.tiny .lang.active{opacity:1;font-weight:600}
header{height:82px;background:#fff}
.head{gap:36px}
.brand{flex:0 0 auto}
.brand .char{font-size:32px}
.brand b{font-size:19px}
.nav{margin-left:auto;gap:22px;font-size:13px}
.nav a{padding:31px 0 27px}
.nav .contact{padding:12px 17px}
.mast{height:300px}
.mast:before{background:linear-gradient(90deg,rgba(0,46,83,.82),rgba(0,46,83,.26)),var(--hero) center/cover}
.mast:after{background:rgba(0,43,76,.08)}
.mast-copy{max-width:820px}
.mast h1{font-family:var(--font-display);font-size:42px;line-height:1.25;font-weight:700;margin:13px 0 14px}
.mast p{font-size:15px;line-height:1.85;max-width:720px}
.eyebrow{font-family:var(--font-sans);font-size:10px;line-height:1.6;font-weight:600;letter-spacing:.16em}
.button,.card a{padding:12px 18px;font-size:11px;font-weight:600}
.crumb{height:50px}
section{padding:86px 0}
.section-head{grid-template-columns:1fr 1fr;gap:90px}
.title{font-family:var(--font-display);font-size:36px;line-height:1.3;font-weight:700;margin:10px 0}
.lead{font-size:14px;line-height:1.95}
.grid3,.grid4{gap:20px;margin-top:38px}
.card{padding:28px;min-height:190px;border:1px solid var(--line);box-shadow:none}
.card:hover{border-color:#aebfca}
.photo{height:220px}
.photo-card .body{padding:23px 25px 27px}
.split{min-height:440px}
.split-copy{padding:58px 66px}
.answer{padding:24px 28px}
.steps{margin-top:38px}
.step{padding:28px;min-height:170px}
.cta{padding:64px 20px;background:var(--navy)}
.cta h2{font-size:34px}
footer{padding:42px 0}

/* 德事首页式结构：克制的场景首屏，栏目分流由顶部导航承担 */
.home .mast{height:300px}
.home .mast:before{background:linear-gradient(90deg,rgba(0,43,76,.78) 0%,rgba(0,43,76,.38) 48%,rgba(0,43,76,.08) 78%),var(--hero) center/cover}
.home .mast-copy{max-width:790px;padding-bottom:0}
.home .mast h1{font-size:40px;line-height:1.23;margin:12px 0 12px}
.home .mast p{font-size:14px;line-height:1.8;max-width:720px;margin:0}
.hero-actions{display:flex;gap:10px;margin-top:16px}
.hero-actions .button{margin-top:0;padding:13px 20px}
.button-ghost{background:transparent;border:1px solid rgba(255,255,255,.82)}
/* 德事内页式大图文结构 */
.home-story{padding:70px 0 82px}
.story-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:54px;align-items:center}
.story-image{height:420px;background:url('assets/images/scene-01.jpg') center/cover}
.story-copy{padding:0 46px 0 0}
.story-copy .title{font-size:38px}
.story-rule{width:44px;height:2px;background:var(--gold);margin:27px 0}
.story-copy h3{font-family:var(--font-display);font-size:21px;line-height:1.45;margin:0 0 10px;color:var(--navy)}
.story-copy>p:not(.lead){font-size:13px;line-height:1.9;color:var(--muted)}
.text-link{display:inline-block;margin-top:19px;font-size:12px;font-weight:600;color:var(--navy);border-bottom:1px solid var(--navy);padding-bottom:4px}

/* 德事产品入口：规整、清晰、不过度放大 */
.home-business{padding:92px 0 96px}
.business-panels{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:42px}
.business-panel{height:340px;padding:27px;display:flex;flex-direction:column;justify-content:space-between;position:relative;isolation:isolate;color:#fff;background-position:center;background-size:cover}
.business-panel:before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(0,43,76,.12),rgba(0,43,76,.88))}
.business-panel.space{background-image:url('assets/images/scene-02.jpg')}
.business-panel.community{background-image:url('assets/images/scene-03.jpg')}
.business-panel.intelligence{background-image:url('assets/images/scene-04.jpg')}
.business-panel>span{font-size:9px;font-weight:600;letter-spacing:.13em;color:#ead2a5}
.business-panel h3{font-family:var(--font-display);font-size:25px;line-height:1.35;margin:0 0 10px}
.business-panel p{font-size:12px;line-height:1.8;color:rgba(255,255,255,.84);min-height:62px}
.business-panel b{font-size:11px;font-weight:600}
.home-ecosystem{padding:92px 0 100px}
.editorial-links{display:grid;grid-template-columns:repeat(4,1fr);margin-top:42px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.editorial-links a{padding:29px 25px 31px;border-right:1px solid var(--line)}
.editorial-links a:first-child{border-left:1px solid var(--line)}
.editorial-links a:hover{background:var(--soft)}
.editorial-links small{font-size:8px;font-weight:600;letter-spacing:.12em;color:var(--gold)}
.editorial-links h3{font-family:var(--font-display);font-size:20px;margin:13px 0 10px;color:var(--navy)}
.editorial-links p{font-size:11px;line-height:1.75;color:var(--muted);min-height:60px}
.editorial-links b{font-size:10px;color:var(--navy)}
@media(max-width:1180px){.wrap{width:calc(100% - 52px)}.nav{gap:12px;font-size:12px}}
@media(max-width:900px){
  .wrap{width:calc(100% - 40px)}
  .home .mast{height:320px}
  .story-grid{grid-template-columns:1fr;gap:40px}
  .story-image{height:380px}
  .story-copy{padding:0}
  .business-panels{grid-template-columns:1fr}
  .business-panel{height:330px}
  .editorial-links{grid-template-columns:1fr 1fr}
}
@media(max-width:600px){
  .wrap{width:calc(100% - 26px)}
  section{padding:70px 0}
  .home .mast{height:430px}
  .home .mast h1{font-size:38px}
  .hero-actions{flex-direction:column;align-items:flex-start}
  .story-image{height:340px}
  .story-copy .title,.title{font-size:31px}
  .editorial-links{grid-template-columns:1fr}
  .editorial-links a{border-left:1px solid var(--line)}
}

/* PUBLIC-SITE */
.brand-logo{display:block;width:190px;max-height:58px;object-fit:contain;object-position:left center}
.photo:after,.concept{display:none!important}
.copy{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:20px}
.icp-link{justify-self:center;color:#647985}.legal-links{display:flex;gap:18px;justify-self:end}.legal-links a{color:#647985}
.legal-copy{max-width:860px;font-size:14px;line-height:2;color:var(--muted)}.legal-copy h2{font-family:var(--font-display);font-size:23px;color:var(--navy);margin:34px 0 8px}
.contact-tag{display:inline-flex;margin-top:12px;padding:9px 13px;background:var(--soft);color:var(--navy);font-size:11px;font-weight:600}
.founder-profile{display:grid;grid-template-columns:minmax(280px,.72fr) minmax(0,1.28fr);gap:72px;align-items:center}.founder-photo{margin:0}.founder-photo img{display:block;width:100%;max-height:680px;object-fit:cover;object-position:center top}.founder-copy .lead{font-size:17px;line-height:1.95}.profile-meta{margin-top:28px;padding-top:18px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}.timeline-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);margin-top:34px}.timeline-item{background:#fff;padding:24px 28px;min-height:118px}.timeline-item b{font-family:var(--font-display);font-size:21px;color:var(--gold)}.timeline-item p{margin:9px 0 0;color:var(--muted);line-height:1.75}.proof-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}.proof-grid p{padding:22px 0;border-top:2px solid var(--navy);line-height:1.8}.proof-grid strong{color:var(--navy)}.contact-proof{background:var(--soft)}
@media(max-width:800px){.founder-profile{grid-template-columns:1fr;gap:34px}.founder-photo img{max-height:620px}.timeline-list,.proof-grid{grid-template-columns:1fr}}
@media(max-width:600px){.brand-logo{width:155px}.copy{display:grid;grid-template-columns:1fr;gap:9px}.icp-link,.legal-links{justify-self:start}.legal-links{margin-top:0}.timeline-item{padding:20px}}

/* MOBILE-NAV-V1 */
.menu-toggle,.menu-backdrop{display:none}
@media(max-width:900px){
  body.menu-open{overflow:hidden}
  header{position:relative;z-index:1001}
  .head{position:relative}
  .section-head,.split,.story-grid{grid-template-columns:1fr}
  .section-head{gap:18px}
  .menu-toggle{display:grid;width:44px;height:44px;padding:11px;border:1px solid var(--line);background:#fff;place-content:center;gap:5px;cursor:pointer;position:relative;z-index:1004}
  .menu-toggle span{display:block;width:21px;height:2px;background:var(--navy);transition:transform .24s ease,opacity .2s ease}
  .menu-open .menu-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .menu-open .menu-toggle span:nth-child(2){opacity:0}
  .menu-open .menu-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .nav{position:fixed;top:0;right:0;z-index:1003;width:min(86vw,360px);height:100dvh;padding:82px 24px 28px;background:#fff;display:flex;flex-direction:column;align-items:stretch;gap:0;overflow-y:auto;box-shadow:-18px 0 48px rgba(3,37,60,.18);transform:translateX(105%);visibility:hidden;transition:transform .28s ease,visibility .28s}
  .nav a:not(.contact){display:block}
  .nav a{padding:16px 2px;border-bottom:1px solid var(--line);font-size:15px;color:var(--navy)}
  .nav a:hover,.nav a.active{border-bottom-color:var(--gold);color:var(--navy)}
  .nav .contact{margin-top:18px;padding:15px;text-align:center;font-size:14px}
  .menu-open .nav{transform:translateX(0);visibility:visible}
  .menu-backdrop{position:fixed;inset:0;z-index:1002;width:100%;height:100%;border:0;background:rgba(2,30,49,.46);opacity:0;pointer-events:none;transition:opacity .25s ease}
  .menu-open .menu-backdrop{display:block;opacity:1;pointer-events:auto}
}
@media(max-width:600px){
  .top{height:32px}.top .wrap>.tiny:first-child{display:none}.top .wrap>.tiny:last-child{width:100%;justify-content:space-between}.top .tiny:last-child a{display:none!important}.top .tiny:last-child a.lang,.top .tiny:last-child a[href^="tel:"]{display:block!important}.top .tiny i{display:none}
  header{height:66px}.brand-logo{width:148px;max-height:48px}.menu-toggle{width:42px;height:42px}
  section{padding:56px 0}.mast,.home .mast{height:390px}.mast .wrap{align-items:flex-end;padding-bottom:32px}.mast h1,.home .mast h1{font-size:clamp(30px,8.4vw,34px);line-height:1.2;margin:9px 0}.mast p,.home .mast p{font-size:13px;line-height:1.6}.eyebrow{letter-spacing:.12em}
  .hero-actions{width:100%;gap:9px;flex-direction:row}.hero-actions .button{width:calc(50% - 4.5px);min-height:46px;padding:11px 8px;justify-content:center;align-items:center;text-align:center}
  .crumb{height:auto;min-height:46px}.crumb .wrap{min-height:46px;gap:14px;overflow-x:auto;white-space:nowrap}
  .story-image{height:300px}.business-panel{height:300px}.card{padding:22px;min-height:0}.button,.contact-tag{min-height:44px;align-items:center}.contact-tag{width:100%;justify-content:center;text-align:center}
  .footer{grid-template-columns:1fr;gap:26px}.copy{display:grid;grid-template-columns:1fr;gap:9px}.icp-link,.legal-links{justify-self:start}.legal-links{margin-top:0}.timeline-item{padding:20px}
}