:root{--ink:#17314f;--blue:#215cc4;--deep:#133b78;--gold:#bd9956;--muted:#5b6d82;--line:#dde5ee;--paper:#f6f8fb;--white:#fff}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;color:var(--ink);background:white;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;font-size:15px;line-height:1.7}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,summary,textarea{outline-offset:4px}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--gold)}.wrap{max-width:1200px;margin:auto;padding:0 24px}.skip{position:absolute;left:20px;top:-60px;background:white;padding:12px;z-index:100}.skip:focus{top:10px}.preview-label{background:#eff3f9;color:#536782;text-align:center;font-size:12px;padding:5px 20px}.header{position:sticky;top:0;z-index:30;background:#ffffffee;backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.header-inner{min-height:84px;display:flex;align-items:center;gap:30px;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px}.brand-mark{font-size:29px;font-weight:900;font-style:italic;letter-spacing:-4px;color:var(--gold);padding-right:5px}.brand-name{display:block;font-size:23px;font-weight:750;line-height:1.2;letter-spacing:2px}.brand-sub{font-size:10px;letter-spacing:1.5px;color:var(--muted)}.nav{display:flex;gap:26px;font-size:14px}.nav a:hover{color:var(--blue)}.head-contact span{display:block;font-size:10px;color:var(--muted);line-height:1.4}.head-contact a{font-size:19px;font-weight:700;color:var(--blue);letter-spacing:.3px}.hero{background:linear-gradient(110deg,#f5f8ff 0%,#f8f9fb 57%,#eef3fc 100%);position:relative;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1fr 390px;gap:66px;padding-top:52px;padding-bottom:40px;align-items:start}.eyebrow{font-size:11px;font-weight:700;color:var(--blue);letter-spacing:2px;display:flex;align-items:center;gap:12px}.eyebrow:before{content:"";height:1px;width:28px;background:var(--gold)}.hero h1{margin:18px 0 16px;font-size:clamp(32px,3.4vw,47px);line-height:1.35;letter-spacing:-1px;font-weight:800}.hero h1 span{display:block;color:var(--blue)}.hero-lead{font-size:20px;font-weight:600;margin:0 0 10px}.hero-description{max-width:545px;color:var(--muted);margin:0;font-size:15px;line-height:1.85}.chips{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 24px}.chips span{padding:4px 11px;background:#fff;border:1px solid #dbe4f2;border-radius:5px;font-size:12px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:12px 20px;min-height:46px;border-radius:6px;border:1px solid var(--blue);background:var(--blue);color:#fff;font-weight:600;cursor:pointer;transition:background .15s}.btn:hover{background:var(--deep)}.btn.secondary{background:white;color:var(--ink);border-color:#c9d5e4}.hero-actions{display:flex;flex-wrap:wrap;gap:12px}.hero-caption{font-size:13px;margin-top:14px;color:var(--muted)}.skyline{max-width:560px;color:#91a8c8;margin:8px 0 -8px;opacity:.7}.skyline svg{display:block;width:100%;height:100px}.request-card{background:white;border:1px solid #e1e8f1;border-radius:12px;padding:26px;box-shadow:0 18px 46px #1938570c;position:relative}.card-top{display:flex;align-items:center;justify-content:space-between}.city-pill{background:#eef4ff;color:var(--blue);font-size:11px;padding:3px 10px;border-radius:50px}.request-card h2{font-size:22px;margin:7px 0 2px;line-height:1.4}.request-card .form-intro{font-size:12px;color:var(--muted);margin:0 0 19px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}label.field{display:block;margin-bottom:13px;font-size:12px;color:#476078}label.field>span{display:flex;justify-content:space-between;margin-bottom:5px}label.field small{font-weight:400;color:#6c7f95}input,select,textarea{display:block;width:100%;max-width:100%;border:1px solid #d9e1eb;border-radius:5px;padding:10px;background:#fcfdff;color:var(--ink);min-width:0;font-size:13px}input:focus,select:focus,textarea:focus{outline:2px solid #b8cff8;border-color:var(--blue)}textarea{resize:vertical;min-height:62px}.submit{width:100%;margin-top:2px}.preview-note{font-size:11px;color:#738296;line-height:1.5;margin:10px 0 0}.trust{background:#fff;border-bottom:1px solid var(--line)}.trust-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:26px 24px}.trust-item{display:flex;gap:12px;align-items:center}.trust-icon{width:32px;height:32px;border:1px solid #decba7;border-radius:50%;display:grid;place-items:center;flex:none;color:var(--gold);font-size:14px}.trust-item p{font-size:13px;line-height:1.6;margin:0;max-width:270px;font-weight:600}.section{padding:65px 0}.section.alt{background:var(--paper)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:28px}.section h2{font-size:30px;line-height:1.35;margin:8px 0}.section .kicker{font-size:10px;letter-spacing:2px;font-weight:650;color:var(--gold)}.section-desc{color:var(--muted);font-size:14px;margin:0;max-width:480px}.roles{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px}.role-card{padding:23px 20px 19px;border:1px solid var(--line);border-radius:9px;transition:border-color .15s,transform .15s;background:white;min-width:0}.role-card:hover{border-color:#97b6e9;transform:translateY(-2px)}.role-symbol{height:39px;display:flex;align-items:center;gap:12px;margin-bottom:12px;color:var(--blue);font-weight:750;font-size:19px}.role-symbol:before{content:"</>";display:grid;place-items:center;width:37px;height:37px;font-size:12px;background:#eef4ff;border-radius:8px;font-weight:700}.role-card h3{font-size:16px;margin:0 0 8px}.role-card p{font-size:12px;color:var(--muted);margin:0 0 15px;line-height:1.8}.role-footer{display:flex;align-items:center;justify-content:space-between;gap:6px}.role-select{border:0;background:transparent;color:var(--blue);font-size:12px;padding:0;cursor:pointer}.role-footer a{font-size:11px;color:#74869a}.scenario{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px}.scenario article{border-top:2px solid #cad7e9;padding:22px 0 5px}.scenario .number{color:var(--gold);font-size:13px;letter-spacing:1px}.scenario h3{font-size:19px;margin:8px 0}.scenario p{font-size:14px;color:var(--muted);line-height:1.9;margin:0}.scenario-bottom{margin-top:26px;border-top:1px solid var(--line);padding-top:20px;display:flex;align-items:center;justify-content:space-between;gap:20px;color:var(--muted);font-size:13px}.flow{list-style:none;display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:12px;margin:28px 0 0;padding:0}.flow li{position:relative;border:1px solid var(--line);border-radius:7px;padding:18px 8px;text-align:center}.flow li strong{display:block;font-size:13px}.flow li span{font-size:11px;color:var(--gold)}.flow li:not(:last-child):after{content:"→";position:absolute;right:-12px;top:34px;color:#afbdd1;z-index:1}.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:55px;align-items:start}.about-content p{color:var(--muted);font-size:14px;line-height:1.95}.about-content h3{font-size:19px;margin:5px 0 12px}.about-banner{display:block;width:100%;height:auto;border-radius:10px;margin-top:28px;border:1px solid var(--line)}.advantage-list{display:grid;grid-template-columns:1fr 1fr;gap:22px 30px}.advantage-list article{border-bottom:1px solid var(--line);padding-bottom:18px}.advantage-list h3{font-size:15px;margin:0 0 7px}.advantage-list p{font-size:12px;line-height:1.9;color:var(--muted);margin:0}.text-link{color:var(--blue);font-size:13px}.faq{max-width:890px;margin:auto}.faq details{border-bottom:1px solid var(--line);padding:18px 0}.faq summary{font-size:16px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:12px}.faq summary:after{content:"+";font-weight:400;color:var(--blue);flex:none}.faq details[open] summary:after{content:"−"}.faq details p{color:var(--muted);font-size:14px;line-height:1.95;margin:12px 28px 0 0}.closing{background:#133a73;color:white;padding:38px 0}.closing-inner{display:flex;align-items:center;justify-content:space-between;gap:26px}.closing h2{font-size:26px;margin:0 0 6px}.closing p{font-size:13px;color:#c5d5ec;margin:0}.closing .btn{background:white;color:var(--deep);border-color:white}.footer{padding:33px 0 25px;font-size:12px;color:var(--muted)}.footer-top{display:flex;justify-content:space-between;gap:28px}.footer strong{font-size:15px;color:var(--ink)}.footer p{margin:5px 0}.footer-nav{display:flex;gap:18px;flex-wrap:wrap}.footer-base{border-top:1px solid var(--line);padding-top:15px;margin-top:22px;font-size:11px;display:flex;justify-content:space-between;gap:20px}.float-contact{position:fixed;right:20px;bottom:24px;z-index:40;display:flex;flex-direction:column;box-shadow:0 5px 20px #16305715;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:white}.float-contact a{padding:12px 15px;text-align:center;font-size:12px}.float-contact a:first-child{background:var(--blue);color:white}.mobile-contact{display:none}.demo-dialog{border:0;border-radius:12px;padding:28px;max-width:420px;width:calc(100% - 32px);color:var(--ink);box-shadow:0 20px 80px #0a234644}.demo-dialog::backdrop{background:#112b4d66}.demo-dialog h2{font-size:22px}.demo-dialog p{font-size:14px;line-height:1.9}.demo-dialog .btn{width:100%}.demo-dialog ul{font-size:14px;color:var(--muted);padding-left:20px}.hint{font-size:12px;color:var(--muted)}
@media(max-width:1050px){.nav{gap:16px}.hero-grid{gap:30px;grid-template-columns:1fr 355px}.hero h1{font-size:37px}.role-card{padding:20px 14px}.flow{grid-template-columns:repeat(4,1fr)}.flow li:nth-child(4):after{display:none}.head-contact a{font-size:16px}}
@media(max-width:760px){html{scroll-padding-top:85px}.wrap{padding:0 20px}.preview-label{font-size:10px;padding:3px 12px}.header-inner{min-height:68px;gap:12px}.brand{gap:8px}.brand-name{font-size:19px;letter-spacing:1px}.brand-sub{font-size:8px;letter-spacing:.7px}.brand-mark{font-size:24px}.nav{display:none}.head-contact span{font-size:9px}.head-contact a{font-size:14px}.hero-grid{display:flex;flex-direction:column;gap:24px;padding-top:30px;padding-bottom:30px}.hero h1{font-size:33px;letter-spacing:-.8px;margin-top:13px}.hero-lead{font-size:17px}.hero-description{font-size:13px;line-height:1.85}.eyebrow{font-size:9px;letter-spacing:1.5px}.chips{margin:16px 0 19px;gap:6px}.chips span{font-size:10px;padding:3px 8px}.hero-actions .btn{font-size:13px;padding:10px 14px;flex:1}.hero-caption{font-size:11px;margin-top:10px}.skyline{display:none}.request-card{width:100%;padding:22px;scroll-margin-top:80px}.request-card h2{font-size:21px}.trust-grid{display:block;padding:18px 20px}.trust-item{gap:10px;padding:10px 0}.trust-item:not(:last-child){border-bottom:1px solid #eef1f5}.trust-item p{max-width:none;font-size:12px}.trust-icon{width:26px;height:26px;font-size:11px}.section{padding:40px 0}.section-head{display:block;margin-bottom:21px}.section h2{font-size:25px}.section .kicker{font-size:9px}.section-desc{font-size:12px}.roles{grid-template-columns:1fr 1fr;gap:10px}.role-card{padding:16px 13px}.role-symbol{font-size:15px;margin-bottom:10px;gap:7px;height:28px}.role-symbol:before{width:28px;height:28px;font-size:10px}.role-card h3{font-size:14px}.role-card p{font-size:10px;margin-bottom:12px;line-height:1.8}.role-footer{display:block}.role-footer a{display:block;margin-top:5px;font-size:10px}.role-select{font-size:11px}.scenario{grid-template-columns:1fr;gap:16px}.scenario article{padding:13px 0 0}.scenario h3{font-size:17px}.scenario p{font-size:12px}.scenario-bottom{display:block;margin-top:22px;font-size:12px}.scenario-bottom .text-link{display:inline-block;margin-top:10px}.flow{grid-template-columns:repeat(2,1fr);gap:10px;margin-top:20px}.flow li{padding:13px 8px}.flow li strong{font-size:12px}.flow li:nth-child(2n):after{display:none}.flow li:after{top:25px!important}.about-grid{grid-template-columns:1fr;gap:24px}.about-content p{font-size:12px}.advantage-list{gap:18px}.advantage-list h3{font-size:13px}.advantage-list p{font-size:11px}.about-banner{border-radius:5px;margin-top:20px}.faq summary{font-size:14px}.faq details p{font-size:12px;margin-right:0}.closing{padding:30px 0}.closing-inner{display:block}.closing h2{font-size:22px}.closing p{font-size:12px}.closing .btn{margin-top:18px;font-size:13px}.footer{padding-bottom:90px}.footer-top{display:block}.footer-nav{margin-top:18px;font-size:11px;gap:14px}.footer-base{display:block;font-size:10px}.footer-base span{display:block;margin-top:6px}.float-contact{display:none}.mobile-contact{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:45;background:#fff;border-top:1px solid var(--line);padding:9px 14px calc(9px + env(safe-area-inset-bottom));gap:9px;box-shadow:0 -3px 14px #1f3a5510}.mobile-contact a{flex:1;font-size:13px;min-height:42px;padding:10px 6px}.mobile-contact a:first-child{flex:.9}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}@media print{.header,.preview-label,.float-contact,.mobile-contact,.request-card{display:none}.hero-grid{display:block}.section{padding:25px 0}.roles{grid-template-columns:repeat(4,1fr)}}

/* Public city pages use the existing homepage brand and shared layout. */
:root{--ink:#203347;--blue:#1f6fab;--deep:#174c7b;--muted:#637588;--line:#e2e9ef;--paper:#f5f8fb}
.top_main,.header_main,.xinda-v3-nav{position:relative;z-index:30}.wrap{max-width:1200px;padding-inline:0}
.trust-grid{grid-template-columns:1.45fr 1.2fr 1fr;gap:24px;padding:26px 0}.trust-item p{max-width:none}.trust-item:first-child p{white-space:nowrap;font-size:13px}
.city-section-nav{background:#fff;border-bottom:1px solid var(--line)}.city-section-nav .wrap{display:flex;gap:30px;align-items:center;min-height:46px;font-size:13px;color:var(--muted)}.city-section-nav a:hover{color:var(--blue)}
.request-options{display:flex;flex-wrap:wrap;gap:7px;margin:18px 0}.request-options span{padding:4px 9px;border:1px solid var(--line);border-radius:4px;font-size:12px;background:var(--paper)}.request-summary{font-size:14px;font-weight:600;line-height:1.8;margin:16px 0}.request-actions{display:grid;gap:10px}.request-note{font-size:12px;color:var(--muted);line-height:1.8;margin:15px 0 0}
@media(max-width:1232px){.wrap{padding-inline:16px}.trust-grid{padding:24px 16px}.trust-item:first-child p{font-size:12px}}
@media(max-width:1050px) and (min-width:761px){.trust-grid{grid-template-columns:1.55fr 1.25fr 1fr;gap:14px}.trust-item{gap:8px}.trust-item p{font-size:11px}.trust-item:first-child p{font-size:11px}.trust-icon{width:26px;height:26px}}
@media(max-width:760px){.wrap{padding-inline:20px}.trust-grid{display:block;padding:18px 20px}.trust-item:first-child p{font-size:clamp(8.5px,2.65vw,11px);white-space:nowrap}.city-section-nav .wrap{justify-content:space-between;gap:12px;font-size:12px;min-height:42px}.request-summary{font-size:13px}.request-actions .btn{font-size:13px}.request-note{font-size:11px}}

.float-contact small{display:block;font-size:10px;font-weight:400;margin-top:3px;opacity:.9}.xinda-chat-open .float-contact{display:none}.role-footer .role-select{display:inline-block;font-size:12px;color:var(--blue)}