:root{
  --ink:#17222b;--ink-2:#22323e;--muted:#5d6972;--paper:#f3f1ec;--surface:#fbfaf7;
  --white:#fff;--line:#d7dcd9;--line-dark:#465761;--red:#a9242b;--red-dark:#7f1d24;
  --blue:#29495d;--steel:#e7ebeb;--max:1200px;--shadow:0 18px 48px rgba(23,34,43,.08);
  --r:3px;--sans:"Noto Sans SC","Microsoft YaHei UI","Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--paper);font-size:16px;line-height:1.72;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input,select,textarea{font:inherit}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:12px;z-index:100;background:#fff;padding:10px 14px}.wrap{width:min(var(--max),calc(100% - 48px));margin:auto}
.topbar{background:var(--ink);color:#dce2e5;font-size:.76rem}.topbar .wrap{display:flex;justify-content:space-between;align-items:center;min-height:34px}.topbar a:hover{color:#fff}.site-header{position:sticky;top:0;z-index:40;background:rgba(251,250,247,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.navrow{min-height:82px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:14px;flex:0 0 auto}.brand img{width:56px;height:56px;object-fit:contain;background:#fff;border:1px solid #ecebe7;padding:2px}.brand span{font-weight:700;letter-spacing:.095em;font-size:1.02rem}.brand small{display:block;color:var(--muted);font-weight:500;letter-spacing:.015em;font-size:.67rem}.nav{display:flex;align-items:center;gap:4px;margin-left:auto}.nav a{font-size:.84rem;font-weight:600;padding:11px 12px;border-bottom:2px solid transparent}.nav a:hover,.nav a[aria-current="page"]{color:var(--red);border-bottom-color:var(--red)}.nav .nav-cta{margin-left:8px;background:var(--red);color:#fff!important;border:1px solid var(--red);padding:10px 15px}.nav .nav-cta[aria-current="page"]{background:var(--red-dark)}.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line);width:44px;height:44px;color:var(--ink)}
.hero{position:relative;overflow:hidden;background:var(--surface);border-bottom:1px solid var(--line)}.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent 49.9%,rgba(41,73,93,.055) 50%,transparent 50.1%),linear-gradient(rgba(41,73,93,.035) 1px,transparent 1px);background-size:120px 100%,100% 72px;pointer-events:none}.hero-grid{position:relative;display:grid;grid-template-columns:1.08fr .92fr;gap:72px;align-items:center;min-height:610px;padding:72px 0}.eyebrow{display:flex;align-items:center;gap:11px;color:var(--red);font-size:.76rem;font-weight:700;letter-spacing:.09em}.eyebrow:before{content:"";width:34px;height:2px;background:var(--red)}h1,h2,h3{font-family:var(--sans);text-wrap:balance}h1{font-size:clamp(3rem,5vw,4.65rem);line-height:1.12;letter-spacing:-.018em;margin:20px 0 24px;max-width:820px;font-weight:700}h2{font-size:clamp(2rem,3.35vw,3.05rem);line-height:1.2;letter-spacing:-.012em;margin:0 0 18px;font-weight:700}h3{font-size:1.16rem;line-height:1.42;margin:0 0 10px;font-weight:700}.lede{font-size:1.08rem;line-height:1.78;color:#46545e;max-width:680px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;background:var(--red);border:1px solid var(--red);color:#fff;font-weight:650;border-radius:var(--r);transition:.18s ease}.btn:hover{background:var(--red-dark);border-color:var(--red-dark)}.btn.secondary{background:transparent;color:var(--ink);border-color:#82909a}.btn.secondary:hover{background:var(--ink);border-color:var(--ink);color:#fff}.btn:focus-visible,.nav a:focus-visible,summary:focus-visible{outline:3px solid rgba(179,32,40,.28);outline-offset:3px}.hero-panel{background:var(--ink);color:#fff;padding:30px;box-shadow:var(--shadow);border-top:4px solid var(--red)}.panel-head{display:flex;justify-content:space-between;gap:15px;font-size:.72rem;letter-spacing:.1em;color:#bac4ca;padding-bottom:17px;border-bottom:1px solid var(--line-dark)}.signal{display:grid;grid-template-columns:72px 1fr;gap:15px;padding:19px 0;border-bottom:1px solid var(--line-dark)}.signal:last-child{border:0}.signal b{font-size:.72rem;color:#ef8a8f;letter-spacing:.08em}.signal strong{display:block;font-size:1rem}.signal span{color:#bdc6cc;font-size:.84rem}.proofbar{background:var(--blue);color:#fff}.proofs{display:grid;grid-template-columns:repeat(4,1fr)}.proof{padding:21px 22px;border-right:1px solid rgba(255,255,255,.15)}.proof:last-child{border:0}.proof span{display:block;font-size:.68rem;color:#c5d0d6;letter-spacing:.08em}.proof strong{font-size:.91rem}
.section{padding:82px 0}.section.white{background:var(--surface)}.section.dark{background:var(--ink);color:#fff}.section.red{background:var(--red-dark);color:#fff}.section-head{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:64px;margin-bottom:42px;align-items:end}.section-head p{color:var(--muted);font-size:1rem;line-height:1.8;margin:0;max-width:660px}.dark .section-head p{color:#bdc6cc}.kicker{color:var(--red);font-size:.74rem;letter-spacing:.09em;font-weight:700;margin-bottom:12px}.dark .kicker,.red .kicker{color:#f0a2a6}.grid{display:grid;gap:18px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}.card{background:var(--white);border:1px solid var(--line);padding:26px;position:relative;border-radius:var(--r)}.card.dark-card{background:var(--ink-2);border-color:var(--line-dark);color:#fff}.card .num{font-size:.7rem;font-weight:700;color:var(--red);letter-spacing:.08em;margin-bottom:28px}.card p{color:var(--muted);margin:0}.dark-card p{color:#bdc6cc}.card-link{display:inline-block;margin-top:20px;font-weight:650;color:var(--red)}.status{display:inline-flex;padding:4px 8px;border:1px solid var(--line);font-size:.68rem;font-weight:700;letter-spacing:.06em}.spec-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line);border-left:1px solid var(--line)}.spec{background:var(--white);padding:22px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.spec small{display:block;letter-spacing:.07em;color:var(--muted);font-weight:650}.spec strong{display:block;margin-top:7px;font-weight:650}.process{counter-reset:step}.step{display:grid;grid-template-columns:62px 1fr;gap:20px;padding:22px 0;border-top:1px solid var(--line)}.step:before{counter-increment:step;content:"0" counter(step);font-weight:700;color:var(--red);font-size:1.3rem}.dark .step{border-color:var(--line-dark)}.dark .step p{color:#bdc6cc}.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:62px;align-items:start}.schematic{background:var(--ink);color:#fff;padding:30px;min-height:400px;display:flex;flex-direction:column;justify-content:space-between}.schematic-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.schematic-cell{border:1px solid var(--line-dark);padding:17px;min-height:108px}.schematic-cell b{display:block;color:#ef8a8f;font-size:.7rem;letter-spacing:.08em}.schematic-cell span{font-weight:650}.flowline{height:3px;background:linear-gradient(90deg,var(--red) 0 66%,#53616b 66%);margin:28px 0}
.table-wrap{overflow:auto;border:1px solid var(--line);background:var(--white);color:var(--ink);box-shadow:0 8px 24px rgba(23,34,43,.04)}table{width:100%;border-collapse:collapse;min-width:680px;color:var(--ink)}th,td{text-align:left;padding:15px 17px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.65}tbody tr:last-child td{border-bottom:0}tbody tr:nth-child(even){background:#f7f7f4}th{font-size:.75rem;letter-spacing:.04em;background:var(--steel);color:#35454f;font-weight:700}.dark .table-wrap,.dark table{color:var(--ink)}.notice{border-left:3px solid var(--red);background:var(--white);padding:19px 22px;color:#46545e}.faq{border-top:1px solid var(--line)}details{border-bottom:1px solid var(--line);padding:17px 0}summary{font-weight:650;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px}summary:after{content:"+";color:var(--red)}details[open] summary:after{content:"−"}details p{max-width:760px;color:var(--muted)}
.form-shell{background:var(--white);border:1px solid var(--line);padding:32px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.field{display:flex;flex-direction:column;gap:7px}.field.full{grid-column:1/-1}.field label{font-weight:650;font-size:.86rem}.field input,.field select,.field textarea{width:100%;border:1px solid #aeb7bd;background:#fff;padding:12px 13px;min-height:48px}.field textarea{min-height:140px;resize:vertical}.checks{display:flex;align-items:flex-start;gap:10px;font-size:.82rem;color:var(--muted)}.checks input{margin-top:5px}.legal{max-width:820px}.legal h2{font-size:1.5rem;letter-spacing:0;margin-top:40px}.legal p,.legal li{color:#46545e}.footer{background:#101820;color:#fff;padding:58px 0 22px}.footer-grid{display:grid;grid-template-columns:1.25fr repeat(3,1fr);gap:40px}.footer h3{font-size:.76rem;letter-spacing:.09em;color:#aeb9c0}.footer a{display:block;color:#d5dce0;margin:8px 0;font-size:.88rem}.footer .brand img{background:#fff}.footer-bottom{border-top:1px solid #34414a;margin-top:46px;padding-top:19px;display:flex;justify-content:space-between;color:#96a3ab;font-size:.76rem}
.subhero{background:var(--surface);border-bottom:1px solid var(--line);padding:76px 0 66px}.subhero .wrap{display:grid;grid-template-columns:minmax(0,1.18fr) minmax(260px,.82fr);gap:64px}.subhero h1{font-size:clamp(2.75rem,4.1vw,4rem);max-width:760px}.route-card{align-self:end;border-left:3px solid var(--red);padding:7px 0 7px 20px;color:var(--muted);max-width:460px}.page-trade .subhero{background:var(--ink);color:#fff}.page-trade .subhero .lede{color:#bdc6cc}.page-research .subhero{background:#e8edee}.page-channel .subhero{background:#f0ece5}.page-company .subhero{background:#ecebe6}.platforms{display:flex;flex-wrap:wrap;gap:10px}.platform{border:1px solid var(--line);background:#fff;padding:12px 18px;font-weight:700}.language-pill{display:flex;gap:11px}.language-pill a{font-weight:650}.language-pill .active{color:#ef8a8f}.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:1050px){.nav-toggle{display:block}.nav{position:fixed;inset:116px 0 auto 0;background:var(--surface);border-bottom:1px solid var(--line);display:none;flex-direction:column;align-items:stretch;padding:18px 24px;gap:2px;box-shadow:var(--shadow)}.nav.open{display:flex}.nav a{padding:11px 8px}.nav .nav-cta{margin:4px 0 0}.hero-grid,.section-head,.split,.subhero .wrap{grid-template-columns:1fr}.hero-grid{gap:38px;padding:56px 0}.section-head,.subhero .wrap{gap:24px}.route-card{max-width:680px}.proofs,.grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:680px){.wrap{width:min(100% - 30px,var(--max))}.topbar .tagline{display:none}.navrow{min-height:68px}.brand img{width:46px;height:46px}.brand span{font-size:.9rem}.brand small{display:none}.nav{inset:102px 0 auto}.hero-grid{min-height:auto;padding:44px 0}.hero h1,h1,.subhero h1{font-size:clamp(2.2rem,10vw,2.65rem);line-height:1.18;letter-spacing:-.01em}.hero-panel{padding:20px}.proofs,.grid.two,.grid.three,.grid.four,.spec-grid,.form-grid,.footer-grid{grid-template-columns:1fr}.proof{border-right:0;border-bottom:1px solid rgba(255,255,255,.15)}.section{padding:58px 0}.section-head{gap:12px;margin-bottom:28px}h2{font-size:clamp(1.8rem,8vw,2.25rem);line-height:1.25}.lede{font-size:1rem}.split{gap:32px}.field.full{grid-column:auto}.footer-bottom{display:block}.actions .btn{width:100%}.subhero{padding:48px 0}.schematic{min-height:auto}.schematic-grid{grid-template-columns:1fr}.topbar .wrap{min-height:34px}.table-wrap{margin-right:-15px;border-right:0}.table-wrap:after{content:"横向滑动查看完整内容";display:block;position:sticky;left:0;padding:8px 12px;background:#eef1f1;color:var(--muted);font-size:.72rem}th,td{padding:13px 14px}.card{padding:23px}.card .num{margin-bottom:20px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}

/* V7 contrast and brand refinement */
body{text-rendering:optimizeLegibility;line-height:1.74}
.section.red{background:#852129;color:#fff;border-top:1px solid rgba(255,255,255,.12)}
.red p,.red .lede,.red .section-head p{color:#fff}
.red .kicker{color:#ffd9db;letter-spacing:.075em}
.red .btn.secondary{background:#fff;color:#68171d;border-color:#fff;box-shadow:0 8px 22px rgba(28,7,9,.16)}
.red .btn.secondary:hover{background:#f3eee9;color:#501116;border-color:#f3eee9}
.red .btn.secondary:focus-visible{outline-color:#fff}
.dark .section-head p,.dark .step p,.dark-card p{color:#c6cfd4}
.footer{background:#111c24;color:#f7f8f8;padding:62px 0 24px;border-top:4px solid var(--blue)}
.footer-grid{grid-template-columns:1.3fr repeat(3,minmax(0,1fr));gap:44px}
.footer p{color:#c7d0d5;max-width:360px}
.footer h3{color:#b9c4ca;letter-spacing:.075em;font-weight:700}
.footer a{color:#e2e7e9}
.footer a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer .brand img{border-color:#d8dddf}
.footer .brand small{color:#b9c4ca}
.footer-bottom{border-color:#3a4953;color:#adb9bf;margin-top:48px;padding-top:20px}
@media(max-width:1050px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:36px}}
@media(max-width:680px){.footer{padding:50px 0 22px}.footer-grid{grid-template-columns:1fr;gap:30px}.footer-bottom{margin-top:36px}}

/* V8 strict contrast and long-copy safeguards */
.section.red,.section.red h2,.section.red h3,.section.red p{color:#fff!important}
.section.red .kicker{color:#ffe3e4!important}
.section.red .btn.secondary,
.section.red a.btn.secondary[style]{background:#fff!important;color:#5d1117!important;border-color:#fff!important;text-shadow:none!important}
.section.red .btn.secondary:hover,
.section.red a.btn.secondary[style]:hover{background:#f4efea!important;color:#431014!important;border-color:#f4efea!important}
.section.red .btn.secondary:focus-visible{outline:3px solid #fff!important;outline-offset:4px}
.footer,.footer .brand span{color:#fff}
.footer p,.footer small{color:#d5dde1!important}
.footer h3{color:#c9d2d7!important}
.footer a{color:#f0f3f4!important}
.footer a:hover,.footer a:focus-visible{color:#fff!important}
.footer-bottom,.footer-bottom span{color:#c1cbd0!important}
h1,h2,h3,.btn,.nav a{overflow-wrap:break-word;word-break:normal;hyphens:auto}
.btn{height:auto;min-height:48px;padding:12px 20px;line-height:1.35;text-align:center;white-space:normal;max-width:100%}
.section-head h2{max-width:22em}
html[lang^="zh"] h1,html[lang^="zh"] h2,html[lang^="zh"] h3{word-break:keep-all;overflow-wrap:anywhere;hyphens:none}
html[lang^="zh"] .btn,html[lang^="zh"] .nav a{word-break:keep-all;hyphens:none}
@media(max-width:680px){
  .section-head h2{font-size:clamp(1.7rem,7.4vw,2.15rem)}
  .section.red .actions{width:100%}
  .section.red .btn.secondary{width:100%;min-height:50px}
  .footer p,.footer a{font-size:.9rem;line-height:1.7}
}

/* V9 Chinese hierarchy and layout calibration */
html[lang^="zh"] .hero-grid{grid-template-columns:minmax(0,1.18fr) minmax(340px,.82fr);gap:58px;min-height:560px;padding:64px 0}
html[lang^="zh"] .hero h1{font-size:clamp(2.85rem,4.35vw,3.9rem);line-height:1.17;letter-spacing:-.012em;max-width:10.8em;margin:18px 0 22px}
html[lang^="zh"] .subhero h1{font-size:clamp(2.55rem,3.75vw,3.45rem);line-height:1.2;letter-spacing:-.008em;max-width:12em}
html[lang^="zh"] .hero .lede,html[lang^="zh"] .subhero .lede{max-width:36em;font-size:1.04rem;line-height:1.82}
html[lang^="zh"] .section{padding:72px 0}
html[lang^="zh"] .section-head{grid-template-columns:minmax(0,1.15fr) minmax(280px,.85fr);gap:52px;align-items:start;margin-bottom:36px}
html[lang^="zh"] .section-head h2{font-size:clamp(1.95rem,2.75vw,2.65rem);line-height:1.26;letter-spacing:-.006em;max-width:17em;margin-bottom:0}
html[lang^="zh"] .section-head p{max-width:36em;font-size:.98rem;line-height:1.82;padding-top:4px}
html[lang^="zh"] .split{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:54px}
html[lang^="zh"] .split>div>h2{font-size:clamp(1.95rem,2.7vw,2.55rem);line-height:1.27;max-width:16em}
html[lang^="zh"] .card{padding:23px 24px}
html[lang^="zh"] .card .num{margin-bottom:20px}
html[lang^="zh"] .card h3{font-size:1.08rem;line-height:1.48}
html[lang^="zh"] .card p{font-size:.94rem;line-height:1.75}
html[lang^="zh"] .grid.four{gap:15px}
html[lang^="zh"] .route-card{line-height:1.75}
html[lang^="zh"] details[open] summary:after{content:"−"}
html[lang^="zh"] .table-wrap:after{content:none}

@media(max-width:1050px){
  html[lang^="zh"] .hero-grid,html[lang^="zh"] .section-head,html[lang^="zh"] .split{grid-template-columns:1fr}
  html[lang^="zh"] .hero-grid{gap:34px;min-height:auto;padding:52px 0}
  html[lang^="zh"] .hero h1{max-width:13em}
  html[lang^="zh"] .section-head{gap:15px}
  html[lang^="zh"] .section-head h2{max-width:22em}
  html[lang^="zh"] .section-head p{max-width:42em;padding-top:0}
}
@media(max-width:680px){
  html[lang^="zh"] .hero-grid{padding:42px 0;gap:28px}
  html[lang^="zh"] .hero h1{font-size:clamp(2.15rem,9.2vw,2.55rem);line-height:1.2;max-width:none}
  html[lang^="zh"] .subhero h1{font-size:clamp(2.05rem,8.8vw,2.4rem);line-height:1.22;max-width:none}
  html[lang^="zh"] .section{padding:54px 0}
  html[lang^="zh"] .section-head{margin-bottom:26px}
  html[lang^="zh"] .section-head h2,html[lang^="zh"] .split>div>h2{font-size:clamp(1.65rem,7vw,2rem);line-height:1.3;max-width:none}
  html[lang^="zh"] .section-head p{font-size:.95rem;line-height:1.78}
  html[lang^="zh"] .card{padding:21px}
  html[lang^="zh"] .grid.four{gap:12px}
  html[lang^="zh"] .table-wrap:after{content:"横向滑动查看完整内容"}
}