:root{--ink:#172b29;--muted:#5d6d6b;--line:#dce2df;--paper:#fff;--wash:#f6f8f6;--accent:#234e42;--control:#000;--control-hover:#1a1a1a;--sage:#eaf0eb;--max:1180px;--header:82px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}html{scroll-padding-top:calc(var(--header) + 28px)}body{margin:0;font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:default}a,button,input,select,textarea,summary{touch-action:manipulation}button,a,input,select,textarea,summary{outline-offset:5px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--accent)}[hidden]{display:none!important}::selection{background:#d2e3d7}.container{width:min(var(--max),calc(100% - 80px));margin-inline:auto}.skip-link{position:fixed;left:20px;top:-100px;background:var(--control);color:white;z-index:100;padding:10px 18px}.skip-link:focus{top:10px}
.site-header{height:var(--header);position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--line)}.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:15px;white-space:nowrap}.brand-en{font-size:23px;font-weight:750;letter-spacing:-1px;line-height:1.2}.nav{display:flex;align-items:center;gap:25px}.nav-item{position:relative;display:flex;align-items:center;gap:2px}.nav-link{font-size:14px;white-space:nowrap;padding-block:27px;position:relative}.nav-link[aria-current="page"]:after{content:"";position:absolute;bottom:15px;left:0;right:0;height:2px;background:var(--accent)}.nav-link:hover,.text-link:hover{color:var(--accent);text-decoration:underline;text-underline-offset:5px}.submenu-toggle{border:0;background:transparent;color:var(--muted);width:23px;height:32px;padding:0;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;line-height:0}.nav-chevron{display:block;width:12px;height:12px;flex-shrink:0}.submenu-toggle[aria-expanded="true"] .nav-chevron{transform:rotate(180deg)}.submenu{position:absolute;top:calc(100% - 1px);left:-20px;min-width:225px;border:1px solid var(--line);background:white;padding:10px;box-shadow:0 10px 24px #122d2210}.submenu a{display:block;padding:9px 12px;font-size:14px}.submenu a:hover{background:var(--wash)}.menu-toggle{display:none;border:1px solid var(--line);background:white;padding:7px 14px;color:var(--ink);font-size:14px}
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.section{padding:82px 0;border-bottom:1px solid var(--line);scroll-margin-top:calc(var(--header) + 24px)}.section-heading{max-width:790px;margin-bottom:35px}.section-heading>p,.section-copy>p{margin-top:18px}.subtitle{color:var(--ink);font-size:21px}.section-copy h2+.subtitle{margin-top:12px}.section-grid{display:grid;grid-template-columns:1fr 1fr;gap:74px;align-items:center}.section-grid .section-copy{min-width:0}.reverse .section-grid>.section-copy{order:2}.reverse .section-grid>.media{order:1}.section-copy .english{margin-top:22px;font-size:14px}.wide .section-heading{max-width:800px}.wide .media{margin-top:36px;max-width:100%}.tags{display:flex;flex-wrap:wrap;gap:9px 27px;padding:0;margin:25px 0 0;list-style:none}.tags li{font-size:14px;line-height:1.7;color:var(--ink);border-bottom:1px solid #b8c7bd;padding-bottom:8px}.actions{display:flex;align-items:center;flex-wrap:wrap;gap:12px;margin-top:29px}.button{display:inline-flex;justify-content:center;align-items:center;gap:19px;background:var(--control);color:white;border:1px solid var(--control);padding:11px 20px;font-size:14px;line-height:1.7;min-height:46px;text-align:left;border-radius:2px;max-width:100%;overflow-wrap:anywhere}.button:hover{background:var(--control-hover);border-color:var(--control-hover)}.button.secondary{background:white;color:var(--ink);border-color:#bdc9c2}.button.secondary:hover{background:var(--wash)}.text-link{display:inline-flex;align-items:center;gap:13px;font-size:14px;font-weight:500;line-height:1.8;color:var(--accent)}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.card-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.card{min-width:0;border:1px solid var(--line);background:white;display:flex;flex-direction:column;border-radius:3px;overflow:hidden}.card>.media{border-radius:0}.card-body{padding:27px;display:flex;flex-direction:column;flex:1}.card-body p{font-size:15px;margin-top:13px;line-height:1.85}.card-body .text-link{margin-top:24px}.card-body .extra-link{font-size:12px;margin-top:10px;font-weight:400}.card-title-link:hover{text-decoration:underline;text-underline-offset:5px}.card .badge{align-self:flex-start;margin-bottom:14px}.badge{display:inline-block;line-height:1.6;padding:4px 10px;border:1px solid #b9c9bf;background:#f4f7f3;color:var(--accent);font-size:12px;font-weight:500;border-radius:2px}.hero-copy>.badge{margin-bottom:18px}.feedback{padding:20px 24px;background:var(--wash);margin-top:24px;color:var(--muted);font-size:15px;border-left:2px solid #a7bdb0}.detail-list{list-style:none;padding:0;margin:28px 0 0}.detail-list li{padding:17px 0;border-top:1px solid var(--line)}.detail-list h3{font-size:17px;letter-spacing:0}.detail-list p{font-size:15px;margin-top:5px}.detail-list.questions h3{font-size:18px}.process-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:25px;counter-reset:step;margin-top:36px}.process-item{border-top:2px solid #92aa9c;padding-top:19px;counter-increment:step}.process-item:before{content:counter(step,decimal-leading-zero);display:block;font-size:12px;color:#6f8577;font-weight:600;margin-bottom:12px}.process-item h3{font-size:19px}.process-item p{font-size:15px;margin-top:10px}.process .media{margin-top:40px;max-width:850px;margin-inline:auto}.cta{background:var(--sage);padding:58px 0;border-bottom:0}.cta-inner{display:flex;gap:50px;align-items:center;justify-content:space-between}.cta-copy{max-width:745px;flex:1}.cta h2{font-size:30px}.cta p{margin-top:14px;max-width:670px}.cta .actions{margin-top:0;max-width:320px;flex-direction:column;align-items:stretch;flex-shrink:0}.plain .section-copy{max-width:820px}.statement{background:var(--wash)}.statement h2{max-width:800px;font-size:39px}.statement p{max-width:800px}.samples .card-body{padding:18px 22px}.samples h3{font-size:17px}.faq-list{border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line)}.faq-list summary{cursor:pointer;list-style:none;padding:24px 36px 24px 0;font-size:18px;position:relative;font-weight:500;line-height:1.7}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"＋";position:absolute;right:2px;top:23px;font-size:22px;font-weight:400}.faq-list details[open] summary:after{content:"−"}.faq-list details p{padding:0 36px 24px 0;max-width:890px}.news-top{display:flex;justify-content:space-between;gap:30px;align-items:flex-end;margin-bottom:32px}.news-top .section-heading{margin-bottom:0}.news-top .text-link{white-space:nowrap;margin-bottom:6px}.news-card{display:grid;grid-template-columns:340px 1fr;gap:32px;max-width:960px;align-items:center}.news-card .news-title{font-size:24px;margin-top:12px}.news-card p{font-size:15px;margin-top:12px}.meta{font-size:12px;color:var(--muted);display:flex;align-items:center;gap:16px}.meta .category{color:var(--accent)}.news-card .text-link{margin-top:18px}.news-card:hover .news-title{text-decoration:underline;text-underline-offset:5px}.filters{display:flex;gap:12px;border-bottom:1px solid var(--line);margin-bottom:38px;padding-bottom:18px;flex-wrap:wrap}.filter{border:1px solid var(--line);background:white;padding:9px 22px;color:var(--muted);font-size:14px;border-radius:2px}.filter[aria-pressed="true"]{background:var(--control);color:white;border-color:var(--control)}.empty-state{padding:65px 32px;background:var(--wash);text-align:center}.empty-state h2{font-size:27px}.empty-state p{margin-top:14px}.empty-state .actions{justify-content:center}.article-page .container.reading{max-width:820px}.article-hero{padding-top:48px}.article-hero h1{font-size:43px;margin-top:19px}.article-hero .lead{font-size:19px;margin-top:24px}.article-hero .media{margin-top:38px}.article-body{padding-top:50px}.article-paragraph{margin-bottom:42px}.article-paragraph h2{font-size:27px;margin-bottom:17px}.article-body .media{margin:15px 0 46px}.article-related h2{font-size:28px}.source{font-size:14px;padding-top:30px;padding-bottom:48px}.source p{font-size:14px}.source .actions{margin-top:12px}
.intents{padding-top:50px}.intent-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.intent-card{display:block;text-align:left;background:white;border:1px solid var(--line);padding:22px 24px;min-height:145px;border-radius:3px;position:relative;color:var(--ink)}.intent-card h3{font-size:18px;padding-right:22px}.intent-card p{margin-top:10px;font-size:14px;font-weight:400;line-height:1.8}.intent-card:hover{border-color:#829d8b;background:var(--wash)}.intent-card[aria-pressed="true"]{border:2px solid var(--control);padding:21px 23px;background:#f4f8f3}.intent-card[aria-pressed="true"]:after{content:"✓";position:absolute;right:18px;top:22px;color:var(--control);font-size:16px}.form-layout{max-width:760px;margin-inline:auto}.form-section{background:var(--wash)}.form-field{margin-top:23px}.form-field label{display:block;font-size:14px;font-weight:600;margin-bottom:9px}.required{color:var(--accent);font-size:12px;font-weight:400;margin-left:7px}.optional{color:var(--muted);font-size:12px;font-weight:400;margin-left:7px}input,select,textarea{width:100%;background:white;border:1px solid #bac8c0;padding:12px 14px;border-radius:2px;color:var(--ink);font-size:15px;line-height:1.7}textarea{resize:vertical;min-height:170px}input::placeholder,textarea::placeholder{color:#7e8983}[aria-invalid="true"]{border-color:#ad4137}.error{color:#a7332b;font-size:13px;min-height:0;margin-top:6px}.form-note{font-size:13px;margin-top:20px;line-height:1.8}.summary{padding-top:55px}.summary-box{padding:30px;background:var(--wash);border:1px solid var(--line);margin-top:26px;white-space:pre-wrap;overflow-wrap:anywhere;font:inherit;color:var(--ink);user-select:text;line-height:1.9}.status{font-size:14px;color:var(--accent);margin-top:15px;min-height:25px}.site-footer{padding:56px 0 22px;background:#f8faf7;border-top:1px solid var(--line)}.footer-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px}.footer-description{font-size:13px;margin-top:20px}.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:16px 25px;align-content:start;font-size:14px;padding-top:5px}.footer-links a:hover{text-decoration:underline;text-underline-offset:4px}.footer-bottom{margin-top:42px;padding-top:20px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.no-script{padding:50px}
@media(min-width:1500px){.hero{padding-top:85px;padding-bottom:95px}.home .hero{padding-top:205px;padding-bottom:210px}}
@media(max-width:1100px){.container{width:calc(100% - 56px)}.nav{gap:16px}.brand{gap:10px}.brand-en{font-size:21px}.hero-grid{gap:38px}.section-grid{gap:42px}.card-body{padding:22px}.nav-link{font-size:13px}}
@media(max-width:960px){:root{--header:72px}.menu-toggle{display:block}.nav{display:none;position:absolute;top:var(--header);left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:20px 28px 26px;max-height:calc(100dvh - var(--header));overflow:auto}.nav.is-open{display:flex;flex-direction:column;align-items:stretch;gap:0}.nav-item{display:flex;flex-wrap:wrap;border-bottom:1px solid var(--line)}.nav-link{font-size:15px;padding:13px 0;flex:1}.nav-link[aria-current="page"]:after{display:none}.nav-link[aria-current="page"]{color:var(--accent);font-weight:650}.submenu-toggle{width:45px;height:49px}.submenu{position:static;flex:0 0 100%;border:0;box-shadow:none;padding:0 0 12px 15px;min-width:0}.hero-grid{grid-template-columns:1fr 1fr;gap:30px}.hero{padding-top:55px;padding-bottom:60px}.home .hero{padding-top:165px;padding-bottom:170px}.hero-copy .subtitle{font-size:18px}.section{padding:62px 0}.section-grid{gap:35px}.card-grid{gap:16px}.card-body{padding:20px}.card-body h3{font-size:19px}.card-body p{font-size:14px}.process-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px}.cta-inner{gap:30px}.cta h2{font-size:27px}.news-card{grid-template-columns:280px 1fr;gap:25px}.intent-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{gap:35px}.footer-links{grid-template-columns:repeat(2,1fr)}}
@media(max-width:700px){:root{--header:68px}.container{width:calc(100% - 40px)}.brand-en{font-size:21px}.hero-grid,.section-grid{grid-template-columns:1fr;gap:34px}.hero{padding:44px 0 48px}.home .hero{padding:144px 0 148px}.hero h1,.home h1{font-size:36px;line-height:1.4;letter-spacing:-.04em}.hero-copy .subtitle{font-size:19px;margin-top:20px}.hero-copy p:not(.english){margin-top:18px}.hero-copy .english{font-size:12px;margin-top:22px}.hero.text-hero{padding:40px 0 42px}.section{padding:48px 0}.section-heading{margin-bottom:28px}.section h2{font-size:28px}.section-copy p,.section-heading p{font-size:15px}.reverse .section-grid>.section-copy{order:0}.reverse .section-grid>.media{order:1}.card-grid,.card-grid.two{grid-template-columns:1fr;gap:20px}.card-body{padding:25px}.card-body h3{font-size:21px}.card-body p{font-size:15px}.tags{gap:12px 20px;margin-top:22px}.tags li{font-size:13px}.actions{gap:10px;margin-top:25px}.button{padding:11px 16px;font-size:13px;gap:12px}.process-grid{gap:25px 20px;margin-top:26px}.process-item h3{font-size:17px}.process-item p{font-size:14px}.process .media{margin-top:29px}.cta{padding:42px 0}.cta-inner{display:block}.cta .actions{margin-top:26px;max-width:none;flex-direction:row;align-items:center}.cta h2{font-size:27px}.news-top{display:block}.news-top>.text-link{margin-top:19px}.news-card{grid-template-columns:1fr;gap:22px}.news-card .news-title{font-size:23px}.news-card .media{max-width:none}.filters{gap:8px}.filter{padding:8px 16px;font-size:13px}.empty-state{padding:42px 22px}.empty-state h2{font-size:24px}.article-hero{padding-top:35px}.article-hero h1{font-size:32px}.article-hero .lead{font-size:17px}.article-hero .media{margin-top:28px}.article-paragraph h2{font-size:25px}.article-paragraph{margin-bottom:32px}.source{padding:25px 0 35px}.intent-grid{grid-template-columns:1fr}.intent-card{min-height:0;padding:20px}.intent-card[aria-pressed="true"]{padding:19px}.intents .section-heading{margin-bottom:25px}.summary-box{padding:22px;font-size:15px}.site-footer{padding-top:40px}.footer-grid{grid-template-columns:1fr;gap:33px}.footer-links{grid-template-columns:repeat(2,1fr);gap:15px}.footer-bottom{margin-top:32px}.faq-list summary{font-size:17px;padding-block:20px}.faq-list summary:after{top:18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
.hero-line{display:block}
/* 双语导航：语言入口在手机菜单关闭时依然可见。 */
.nav{margin-left:auto}.header-controls{display:flex;align-items:center;gap:12px;flex-shrink:0}.language-switch{display:inline-flex;align-items:center;justify-content:center;min-width:40px;min-height:38px;padding:6px 9px;border:1px solid var(--line);font-size:12px;font-weight:600;line-height:1.6;white-space:nowrap}.language-switch:hover{background:var(--wash);border-color:#9caf9f}html[lang="en"] h1,html[lang="en"] h2,html[lang="en"] h3{overflow-wrap:normal;word-break:normal;hyphens:none}html[lang="en"] .hero h1{font-size:clamp(34px,3.4vw,49px);line-height:1.2;letter-spacing:-.04em}html[lang="en"] .hero-copy .subtitle{font-size:20px}html[lang="en"] .nav{gap:21px}html[lang="en"] .nav-link{font-size:13px}html[lang="en"] .cta .actions{max-width:350px}html[lang="en"] .card-body h3{font-size:21px}html[lang="en"] .tags li{font-size:13px}html[lang="en"] .summary-box{line-height:1.9}
@media(max-width:1100px){.header-inner{gap:18px}html[lang="en"] .nav{gap:14px}html[lang="en"] .nav-link{font-size:12px}}
@media(max-width:960px){.nav{margin-left:0}html[lang="en"] .nav{gap:0}html[lang="en"] .nav-link{font-size:15px}.header-controls{margin-left:auto}}
@media(max-width:700px){.header-inner{gap:12px}.header-controls{gap:8px}.language-switch{min-width:35px;padding:6px 8px}.menu-toggle{padding:7px 10px}html[lang="en"] .hero h1{font-size:36px;line-height:1.24}html[lang="en"] .hero-copy .subtitle{font-size:18px}html[lang="en"] .cta .actions{max-width:none}html[lang="en"] .button{font-size:13px}}
@media(max-width:380px){.brand-en{font-size:18px;letter-spacing:-.6px}.brand{gap:8px}.menu-toggle{padding-inline:8px;font-size:13px}.header-controls{gap:6px}.header-inner{gap:8px}}