/* ===== 番启留学 · 新版静态站 ===== */
:root{
  --ink:#0a0f1c; --ink-2:#1b2436; --muted:#667085; --line:#e6e8ee;
  --paper:#ffffff; --paper-2:#f6f7fb;
  --navy:#002fa7; --navy-2:#001f6e; --lime:#c7f464; --lime-2:#e9ffb0;
  --radius:16px; --radius-sm:10px;
  --shadow:0 10px 30px rgba(10,15,28,.08);
  --font:"Noto Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  --display:"Barlow Condensed","Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--paper);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
.container{width:min(1200px,92vw);margin:0 auto}
.skip{position:absolute;left:-9999px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.02em}
.brand img{height:40px;width:auto}
.brand span{font-size:15px}
.nav-links{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.nav-links a{padding:8px 11px;border-radius:8px;font-size:14px;color:#33405a;white-space:nowrap}
.nav-links a:hover{background:var(--paper-2);color:var(--navy)}
.nav-links a.active{color:var(--navy);font-weight:700}
.nav-cta{background:var(--navy);color:#fff!important;padding:9px 16px;border-radius:999px;font-weight:700}
.nav-cta:hover{background:var(--navy-2)!important;color:#fff!important}
.burger{display:none;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 10px;font-size:18px;cursor:pointer}
@media(max-width:980px){
  .nav{height:64px}
  .nav-links{position:fixed;inset:64px 0 auto 0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 4vw 16px;display:none;max-height:calc(100vh - 64px);overflow:auto}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 10px;border-radius:8px}
  .burger{display:block}
  .nav-cta{text-align:center}
}

/* hero */
.hero{background:radial-gradient(1200px 600px at 82% -10%,#123a9e 0%,transparent 60%),linear-gradient(180deg,#071024,#0a1430 60%,#0a0f1c 100%);color:#fff;padding:76px 0 64px;overflow:hidden}
.hero .kicker{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(199,244,100,.35);color:var(--lime);border-radius:999px;padding:6px 12px;font-size:12px;letter-spacing:.16em;text-transform:uppercase}
.hero h1{font-size:clamp(34px,5vw,64px);line-height:1.12;margin:18px 0 16px;letter-spacing:-.01em;font-weight:900}
.hero p.lead{font-size:clamp(15px,1.6vw,18px);color:#c9d3e6;max-width:640px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:999px;font-weight:700;font-size:14px;border:1px solid transparent;transition:.2s}
.btn-primary{background:var(--lime);color:#0a0f1c}
.btn-primary:hover{background:#d6fa86;transform:translateY(-1px)}
.btn-ghost{border-color:rgba(255,255,255,.28);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-2)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero-media{position:relative}
.hero-media img{width:100%;height:100%;border-radius:22px;box-shadow:0 30px 60px rgba(0,0,0,.35);aspect-ratio:4/3;object-fit:cover}
.hero-media .tag{position:absolute;left:18px;bottom:18px;background:rgba(10,15,28,.72);backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.15);color:#fff;padding:8px 12px;border-radius:999px;font-size:12px}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:28px}.hero{padding:52px 0 44px}}

/* stats */
.stats{background:var(--lime);color:#0a0f1c}
.stats .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat{padding:26px 20px;border-right:1px solid rgba(10,15,28,.14)}
.stat:last-child{border-right:0}
.stat b{display:block;font-family:var(--display);font-size:clamp(30px,3.4vw,44px);line-height:1;font-weight:800}
.stat span{font-size:13px;color:#243014}
@media(max-width:760px){.stats .grid{grid-template-columns:repeat(2,1fr)}.stat{border-bottom:1px solid rgba(10,15,28,.14)}}

/* sections */
.section{padding:72px 0}
.section.alt{background:var(--paper-2)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:34px}
.section-head .eyebrow{font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--navy);font-weight:800;display:flex;align-items:center;gap:10px}
.section-head .eyebrow::before{content:"";width:28px;height:1px;background:var(--navy)}
.section-head h2{font-size:clamp(26px,3.2vw,40px);line-height:1.2;margin:8px 0 0;letter-spacing:-.01em}
.section-head p{margin:8px 0 0;color:var(--muted);max-width:640px}
.link-more{color:var(--navy);font-weight:700;font-size:14px;white-space:nowrap}

/* cards */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
@media(max-width:980px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.grid-4,.grid-3,.grid-2{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.22s;display:flex;flex-direction:column;gap:8px}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cdd6ea}
.card .num{font-family:var(--display);font-size:13px;color:var(--navy);font-weight:800;letter-spacing:.12em}
.card h3{margin:0;font-size:19px;line-height:1.35}
.card p{margin:0;color:var(--muted);font-size:14px}
.card .more{margin-top:auto;color:var(--navy);font-weight:700;font-size:13px;padding-top:10px}

/* school cards */
.school-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;transition:.2s}
.school-card:hover{border-color:var(--navy);box-shadow:var(--shadow);transform:translateY(-2px)}
.school-card h3{margin:0 0 6px;font-size:16px}
.school-card p{margin:0;font-size:13px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* page hero for inner pages */
.page-hero{background:linear-gradient(180deg,#f3f6ff,#fff);border-bottom:1px solid var(--line);padding:46px 0 40px}
.breadcrumb{font-size:12px;color:var(--muted);display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px}
.breadcrumb a:hover{color:var(--navy)}
.page-hero h1{font-size:clamp(28px,4vw,48px);line-height:1.18;margin:0 0 12px;letter-spacing:-.01em}
.page-hero p.lead{color:#4a556b;max-width:820px;margin:0;font-size:16px}

/* article / prose */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;padding:56px 0 72px}
@media(max-width:900px){.layout{grid-template-columns:1fr;gap:32px;padding:36px 0 56px}}
.prose{max-width:820px}
.prose h2{font-size:clamp(22px,2.6vw,30px);margin:38px 0 12px;line-height:1.3;letter-spacing:-.01em}
.prose h3{font-size:19px;margin:26px 0 8px}
.prose p{margin:0 0 14px;color:#333d52}
.prose ul{margin:0 0 16px;padding-left:20px;color:#333d52}
.prose li{margin:6px 0}
.prose img{max-width:100%;height:auto;border-radius:12px;margin:18px 0}
.callout{background:var(--paper-2);border-left:4px solid var(--navy);padding:16px 18px;border-radius:0 10px 10px 0;margin:22px 0;color:#2b3550;font-size:14px}
.aside{position:sticky;top:92px;align-self:start;display:flex;flex-direction:column;gap:18px}
.aside .box{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.aside h4{margin:0 0 12px;font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.aside .box a:not(.btn){display:block;padding:8px 0;border-bottom:1px dashed var(--line);font-size:14px}
.aside .box a:not(.btn):last-child{border-bottom:0}
.aside .box a:not(.btn):hover{color:var(--navy)}
.aside .cta .btn{display:flex;width:100%;justify-content:center;margin-top:14px;padding:13px 18px;font-size:14px;box-shadow:0 10px 22px rgba(199,244,100,.28)}
.aside .cta .btn:hover{transform:translateY(-1px);box-shadow:0 14px 26px rgba(199,244,100,.34)}
.aside .cta h4{font-size:13px;letter-spacing:.14em}
.aside .cta p{margin-bottom:4px}
.aside .cta{background:var(--navy);color:#fff;border:0}
.aside .cta h4{color:var(--lime-2)}
.aside .cta p{color:#dbe4ff;font-size:13px;margin:0 0 12px}

/* list page cards */
.list-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:980px){.list-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.list-grid{grid-template-columns:1fr}}
.article-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;display:flex;flex-direction:column;gap:8px;transition:.2s}
.article-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#cdd6ea}
.article-card h3{margin:0;font-size:17px;line-height:1.4}
.article-card p{margin:0;color:var(--muted);font-size:13px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.article-card time{font-size:12px;color:#98a2b3}

/* filters */
.filters{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 24px}
.filters input,.filters select{border:1px solid var(--line);background:#fff;border-radius:999px;padding:10px 16px;font-size:14px;font-family:inherit;color:var(--ink);outline:none;min-width:180px}
.filters input:focus,.filters select:focus{border-color:var(--navy)}
.count{font-size:13px;color:var(--muted);margin-left:auto;align-self:center}

/* gallery */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.gallery img{width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:12px;transition:.3s;filter:saturate(.95)}
.gallery img:hover{transform:scale(1.02);filter:saturate(1.1)}
@media(max-width:760px){.gallery{grid-template-columns:repeat(2,1fr)}}

/* cta band */
.cta-band{background:linear-gradient(120deg,#001f6e,#002fa7 55%,#0b3ec7);color:#fff;border-radius:24px;padding:46px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.cta-band h2{margin:0 0 8px;font-size:clamp(24px,3vw,36px)}
.cta-band p{margin:0;color:#d7e0ff}
@media(max-width:700px){.cta-band{padding:30px 24px}}

/* footer */
.site-footer{background:#070b14;color:#c3cbdc;margin-top:72px;padding:56px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:28px}
.site-footer h4{color:#fff;font-size:14px;margin:0 0 12px}
.site-footer .footer-grid > div > a{display:block;color:#9fa9bd;font-size:13px;padding:4px 0}
.site-footer .footer-grid > div > a:hover{color:var(--lime)}
.site-footer .contact-line{display:flex;align-items:baseline;gap:8px;margin:0 0 8px;font-size:13px;color:#9fa9bd}
.site-footer .contact-line span{color:#8b95a9;flex-shrink:0}
.site-footer .contact-line a{display:inline;padding:0;color:#fff;border-bottom:1px dashed rgba(255,255,255,.25)}
.site-footer .contact-line a:hover{color:var(--lime);border-bottom-color:var(--lime)}
.site-footer p{font-size:13px;color:#9fa9bd;margin:0 0 6px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding-top:18px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:12px;color:#8b95a9}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.footer-grid{grid-template-columns:1fr}}

/* misc */
.badge-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.badge{background:#eef2ff;color:#233a8f;border-radius:999px;padding:5px 10px;font-size:12px;font-weight:600}
.reveal{opacity:0;transform:translateY(14px);transition:.6s}
.reveal.in{opacity:1;transform:none}

/* tables & faq */
.req-table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.req-table tr:nth-child(even){background:var(--paper-2)}
.req-table th,.req-table td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--line)}
.req-table th{color:#33405a;font-weight:700;background:#fbfcff}
.req-table.kv th{width:34%}
.req-table.cmp{font-size:13px}
.req-table.cmp th,.req-table.cmp td{padding:10px 12px;white-space:nowrap}
.table-scroll{overflow-x:auto;margin:16px 0}
.table-scroll .req-table{margin:0;min-width:760px}
.req-table tr:last-child th,.req-table tr:last-child td{border-bottom:0}
.faq-q{font-size:16px;margin:22px 0 6px;color:var(--ink)}
.faq-a{margin:0 0 14px;color:#4a556b;padding-left:14px;border-left:3px solid var(--lime)}

/* timeline */
.timeline{position:relative;margin:26px 0 10px;padding-left:30px}
.timeline::before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:var(--line)}
.tl-item{position:relative;padding-bottom:26px}
.tl-item::before{content:"";position:absolute;left:-27px;top:6px;width:10px;height:10px;border-radius:50%;background:var(--navy);box-shadow:0 0 0 4px #e9eeff}
.tl-item:last-child{padding-bottom:0}
.tl-year{font-family:var(--display);font-size:26px;font-weight:800;color:var(--navy);line-height:1;letter-spacing:.02em}
.tl-item h3{margin:6px 0 4px;font-size:18px}
.tl-item p{margin:0;color:var(--muted);font-size:14px}

/* cert grid */
.cert-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:16px 0 10px}
@media(max-width:640px){.cert-grid{grid-template-columns:1fr}}
.cert{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:#fbfcff}
.cert-year{display:block;font-family:var(--display);font-size:13px;font-weight:800;color:var(--navy);letter-spacing:.08em}
.cert b{display:block;font-size:15px;margin:4px 0 2px}
.cert span:last-child{font-size:12px;color:var(--muted)}

/* results cases */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:980px){.case-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.case-grid{grid-template-columns:1fr}}
.case-card{border:1px solid var(--line);border-radius:16px;padding:22px;background:#fff;transition:.2s}
.case-card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.case-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.case-cat{background:#eef2ff;color:var(--navy);border-radius:999px;padding:4px 10px;font-size:12px;font-weight:700}
.case-year{font-size:12px;color:var(--muted)}
.case-card h3{margin:0 0 4px;font-size:19px}
.case-country{color:var(--muted);font-size:13px;margin-bottom:12px}
.case-bg{border-left:3px solid var(--navy);padding-left:10px;font-size:12px;color:#4a556b;margin-bottom:12px}
.case-bg span{display:block;color:#98a2b3;margin-bottom:2px}
.case-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.7}

/* tag list (skills / target schools) */
.tag-list{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0 0 18px}
.tag-list li{background:#f1f4ff;border:1px solid #dbe3ff;border-radius:999px;padding:6px 12px;font-size:13px;color:#2b3a6b}

/* lead form */
.lead-form{border:1px solid var(--line);border-radius:16px;padding:24px;background:#fbfcff;margin:0 0 30px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-grid label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:#33405a;font-weight:600}
.form-grid .full{grid-column:1/-1}
.form-grid input,.form-grid select,.form-grid textarea{border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:14px;font-family:inherit;background:#fff;outline:none}
.form-grid input:focus,.form-grid select:focus,.form-grid textarea:focus{border-color:var(--navy)}
.form-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:16px}
.form-hint{font-size:12px;color:var(--muted)}
.form-ok{color:#0a7a3d;font-size:13px;margin:12px 0 0}
@media(max-width:640px){.form-grid{grid-template-columns:1fr}}

/* section hero split & facts */
.hero-split{display:grid;grid-template-columns:1.35fr .65fr;gap:36px;align-items:center}
.hero-facts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.fact{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px}
.fact b{display:block;font-family:var(--display);font-size:26px;color:var(--navy);line-height:1.1}
.fact span{font-size:12px;color:var(--muted)}
@media(max-width:820px){.hero-split{grid-template-columns:1fr;gap:20px}}
/* chips */
.chips{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:72px;z-index:30}
.chips .container{display:flex;gap:8px;overflow:auto;padding:10px 0}
.chips a{white-space:nowrap;border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:13px;color:#33405a}
.chips a:hover{border-color:var(--navy);color:var(--navy)}
@media(max-width:980px){.chips{top:64px}}
/* service cards */
.svc-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;display:flex;flex-direction:column;gap:8px;transition:.2s}
.svc-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cdd6ea}
.svc-card .num{font-family:var(--display);font-size:13px;color:var(--navy);font-weight:800;letter-spacing:.12em}
.svc-card h3{margin:0;font-size:19px}
.svc-card p{margin:0;color:var(--muted);font-size:13px}
.svc-card ul{list-style:none;padding:0;margin:6px 0 0;display:flex;flex-direction:column;gap:4px}
.svc-card li{font-size:12px;color:#4a556b;padding-left:12px;position:relative}
.svc-card li::before{content:"";position:absolute;left:0;top:7px;width:5px;height:5px;border-radius:50%;background:var(--navy)}
.svc-card .more{margin-top:auto;padding-top:10px;color:var(--navy);font-weight:700;font-size:13px}
/* faq list */
.faq-list{display:flex;flex-direction:column;gap:10px;max-width:900px}
.faq-item{border:1px solid var(--line);border-radius:12px;background:#fff;padding:0 18px}
.faq-item summary{cursor:pointer;padding:16px 0;font-weight:700;font-size:15px;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:var(--navy);font-weight:800}
.faq-item[open] summary::after{content:"−"}
.faq-item .faq-a{padding:0 0 16px;color:#4a556b;font-size:14px;border-top:1px solid var(--line);padding-top:12px}

/* table accordion */
.table-box{border:1px solid var(--line);border-radius:14px;background:#fff;margin:0 0 12px;padding:0 18px}
.table-box summary{cursor:pointer;padding:16px 0;font-weight:800;font-size:16px;list-style:none;display:flex;justify-content:space-between}
.table-box summary::-webkit-details-marker{display:none}
.table-box summary::after{content:"+";color:var(--navy)}
.table-box[open] summary::after{content:"−"}
.table-box .req-table{margin:4px 0 18px}
.note{font-size:13px;color:var(--muted);margin:6px 0 0}

/* news categories & featured */
.news-cat{display:inline-block;background:#eef2ff;color:var(--navy);border-radius:999px;padding:3px 10px;font-size:11px;font-weight:700;margin-bottom:8px}
.cat-chips{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 18px}
.cat-chip{border:1px solid var(--line);border-radius:999px;padding:7px 14px;font-size:13px;color:#33405a;cursor:pointer;background:#fff}
.cat-chip em{font-style:normal;color:#98a2b3;font-size:11px;margin-left:4px}
.cat-chip.active{background:var(--navy);color:#fff;border-color:var(--navy)}
.cat-chip.active em{color:#c7d4ff}
.featured-grid{display:grid;grid-template-columns:1.35fr 1fr;grid-template-rows:1fr 1fr;gap:14px}
.feat-main{grid-row:span 2;background:linear-gradient(150deg,#001f6e,#002fa7);color:#fff;border-radius:18px;padding:30px;display:flex;flex-direction:column;justify-content:flex-end;min-height:320px}
.feat-main h3{font-size:26px;line-height:1.3;margin:6px 0 10px;color:#fff}
.feat-main p{color:#d6e0ff;font-size:14px;margin:0 0 16px}
.feat-main .more{color:var(--lime);font-weight:700;font-size:13px}
.feat-side{border:1px solid var(--line);border-radius:16px;padding:20px;background:#fff;display:flex;flex-direction:column;gap:6px}
.feat-side h3{font-size:16px;line-height:1.4;margin:0}
.feat-side p{margin:0;color:var(--muted);font-size:13px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.feat-side .more{margin-top:auto;color:var(--navy);font-weight:700;font-size:12px;padding-top:8px}
.feat-main .news-cat{background:rgba(199,244,100,.16);color:var(--lime)}
@media(max-width:900px){.featured-grid{grid-template-columns:1fr;grid-template-rows:none}.feat-main{grid-row:auto;min-height:240px}}

/* mobile overflow guards */
html,body{max-width:100%;overflow-x:hidden}
.layout{min-width:0}
.layout>*{min-width:0}
.aside{width:100%}
.prose{min-width:0;max-width:100%}
.prose table{max-width:100%}

/* aside CTA polish */
.aside .cta{background:linear-gradient(150deg,#001f6e 0%,#002fa7 100%);box-shadow:0 16px 32px rgba(0,47,167,.18)}
.aside .cta p{line-height:1.65}
.aside .cta .btn{font-weight:800;letter-spacing:.02em}

/* subpage content */
.sub-lead{font-size:17px;line-height:1.8;color:#33405a;border-left:3px solid var(--lime);padding-left:16px;margin:0 0 26px}
.sub-facts{grid-template-columns:repeat(4,1fr);margin:0 0 30px}
.sub-facts .fact b{font-size:20px}
@media(max-width:820px){.sub-facts{grid-template-columns:1fr 1fr}}
.prose h2{scroll-margin-top:96px}

/* hero 防溢出（grid 子项不因内容撑宽） */
.hero-grid>*{min-width:0}
.hero p.lead{overflow-wrap:anywhere}
.hero-media img{max-height:520px}

/* back to top */
.to-top{position:fixed;right:24px;bottom:24px;z-index:80;width:46px;height:46px;border-radius:50%;
  border:0;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;
  cursor:pointer;box-shadow:0 10px 24px rgba(0,22,84,.28);opacity:0;transform:translateY(14px);
  pointer-events:none;transition:opacity .25s,transform .25s,background .2s}
.to-top.show{opacity:1;transform:none;pointer-events:auto}
.to-top:hover{background:var(--lime);color:var(--navy);transform:translateY(-2px)}
.to-top:focus-visible{outline:3px solid rgba(199,244,100,.55);outline-offset:2px}
@media(max-width:640px){.to-top{right:16px;bottom:18px;width:42px;height:42px}}
@media(prefers-reduced-motion:reduce){.to-top{transition:none}}