:root{--ink:#0c1a24;--ink-2:#13283a;--line-ink:#243a48;--paper:#f6f3ee;--paper-2:#efe9e0;--card:#fff;--rule:#ddd5c9;--fg:#17232b;--muted:#66727a;--on-ink:#eef3f5;--on-ink-muted:#8fa3ae;--accent:#2f9ea6;--accent-ink:#06282b;--brass:#c9a35c;--ok:#2f9a6a;--warn:#c9a35c;--display:"Manrope","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;--serif:"Fraunces","Noto Serif SC",Georgia,serif;--mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--fg);font-family:var(--display);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%;display:block}
h1,h2,h3,h4{margin:0;font-family:var(--display);letter-spacing:-.01em;text-wrap:balance;line-height:1.15}
h1{font-size:clamp(34px,5.2vw,58px);font-weight:800;line-height:1.05}
h2{font-size:clamp(26px,3.6vw,38px);font-weight:800}
h3{font-size:19px;font-weight:700}
p{margin:0 0 14px}
em.w{font-family:var(--serif);font-style:italic;font-weight:400;color:var(--brass);letter-spacing:0}
html[lang^="zh"] em.w{font-style:normal;font-weight:500}
.wrap{max-width:1120px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.eyebrow{font-family:var(--mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);display:flex;gap:8px;align-items:center;margin:0 0 12px}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);flex:0 0 auto}
.lead{font-size:18px;color:var(--muted);max-width:62ch}
.btn{display:inline-flex;align-items:center;gap:8px;border-radius:999px;padding:11px 20px;font-weight:600;font-size:15px;text-decoration:none;border:1px solid currentColor;cursor:pointer;font-family:var(--display);background:transparent;color:inherit;line-height:1.2}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--brass);outline-offset:3px}
.cta{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:8px}
.logline{font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;display:flex;gap:18px;flex-wrap:wrap;color:var(--on-ink-muted)}
.logline b{font-weight:500;color:var(--on-ink)}
/* header */
header{background:var(--ink);color:var(--on-ink);position:sticky;top:0;z-index:20;border-bottom:1px solid var(--line-ink)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:14px}
.logo{font-weight:800;letter-spacing:.06em;text-decoration:none;font-size:18px;display:flex;align-items:center;gap:10px}
.logo::before{content:"";width:20px;height:20px;background:linear-gradient(135deg,var(--accent),var(--brass));clip-path:polygon(50% 0,62% 38%,100% 50%,62% 62%,50% 100%,38% 62%,0 50%,38% 38%)}
.logo span{color:var(--accent)}
.menu{display:flex;gap:22px;align-items:center;font-size:14.5px;font-weight:600}
.menu a{text-decoration:none;color:var(--on-ink-muted)}
.menu a:hover{color:var(--on-ink)}
.menu .btn{color:var(--accent-ink);background:var(--accent);border-color:var(--accent);padding:8px 16px;font-size:14px}
.menu .lang,.lang{font-family:var(--mono);font-size:12px;color:var(--on-ink-muted);text-decoration:none}
.burger{display:none}
@media (max-width:820px){.menu{display:none}.burger{display:inline-flex;color:var(--accent-ink);background:var(--accent);border-color:var(--accent);padding:8px 14px;font-size:14px}}
/* hero (home) */
.hero{background:var(--ink);color:var(--on-ink)}
.hero .wrap{padding-block:60px 36px;display:grid;gap:24px}
.hero h1{max-width:15ch}
.hero p{color:var(--on-ink-muted);max-width:60ch;font-size:18px;margin:0}
.hero .eyebrow{color:var(--on-ink-muted);margin:0}
.hero .btn{color:var(--on-ink)}
.hero .btn.primary{color:var(--accent-ink)}
.hero .hnote{font-family:var(--mono);font-size:11.5px;color:var(--on-ink-muted)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:32px;align-items:center}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr}}
.hero-photo{border-radius:14px;overflow:hidden;border:1px solid var(--line-ink);aspect-ratio:4/3;max-width:100%;position:relative;background:var(--ink-2)}
.hero-photo img{width:100%;height:100%;object-fit:cover}
.hero-photo .cap{position:absolute;left:12px;bottom:12px;font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:#cfe0e6;background:rgba(12,26,36,.75);padding:4px 8px;border-radius:4px}
.hero-visual{background:var(--ink-2);border:1px solid var(--line-ink);border-radius:14px;padding:18px 20px;display:grid;gap:12px;min-width:0}
.hero-visual .row{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:10px;border:0;padding:0}
.cell{background:var(--ink);border:1px solid var(--line-ink);border-radius:8px;padding:10px 12px;min-width:0}
.cell .k{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;color:var(--on-ink-muted);text-transform:uppercase}
.cell .v{font-family:var(--mono);font-size:20px;color:var(--on-ink);font-variant-numeric:tabular-nums}
.cell .v small{font-size:11px;color:var(--on-ink-muted)}
.cell.ok .v{color:#7fd3b0}.cell.warn .v{color:var(--brass)}
.spark{height:46px;width:100%;display:block}
.strip-route{border-top:1px solid var(--line-ink);padding-top:16px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
/* strip (rules) */
.strip{background:var(--paper-2);border-bottom:1px solid var(--rule)}
.strip .wrap{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;padding-block:26px}
.strip div>b,.strip b{display:block;font-family:var(--mono);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:4px}
.strip .wrap>div{border-left:3px solid var(--brass);padding-left:14px;font-size:15px;min-width:0}
/* sections */
main>section,section.body,section.related{padding-block:60px}
section.soft{background:var(--paper-2)}
.grid{display:grid;gap:18px;margin-top:28px}
.g4{grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.g2{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.card{background:var(--card);border:1px solid var(--rule);border-radius:14px;padding:18px 20px;display:grid;gap:8px;align-content:start;min-width:0;text-decoration:none;color:inherit;overflow:hidden}
a.card:hover{border-color:var(--accent)}
.card p{margin:0;color:var(--muted);font-size:14.5px}
.card .more{font-weight:600;font-size:14px;margin-top:4px}
.card .id{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--accent)}
.card.photo-card{padding:0}
.card.photo-card .photo{aspect-ratio:16/10;max-width:100%;overflow:hidden;background:var(--ink-2)}
.card.photo-card .photo img{width:100%;height:100%;object-fit:cover}
.card.photo-card .cbody{padding:16px 18px 18px;display:grid;gap:8px}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.step{background:var(--card);border:1px solid var(--rule);border-radius:14px;padding:18px;display:grid;gap:6px;min-width:0}
.step b{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--accent);text-transform:uppercase}
.step h3{font-size:17px}
.step p{margin:0;color:var(--muted);font-size:14.5px}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px}
.fact{border-left:3px solid var(--brass);padding:4px 14px;display:grid;gap:4px;min-width:0}
.fact b{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}
.fact span{font-size:15px}
.split{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:36px;align-items:center}
.mock{background:var(--ink);color:var(--on-ink);border:1px solid var(--line-ink);border-radius:14px;padding:18px 20px;font-family:var(--mono);font-size:13px;display:grid;gap:8px;min-width:0}
.mock .row{display:flex;gap:10px;align-items:center;border-bottom:1px solid var(--line-ink);padding-bottom:8px}
.mock .ok,.mock .warn{width:9px;height:9px;border-radius:50%;display:inline-block;flex:0 0 auto}
.mock .ok{background:#7fd3b0}.mock .warn{background:var(--brass)}
.mock .bar{height:6px;border-radius:3px;background:var(--accent);opacity:.8}
.cta-band{background:var(--ink);color:var(--on-ink);padding-block:56px}
.cta-band p{color:var(--on-ink-muted);max-width:60ch}
.cta-band .btn{color:var(--on-ink)}.cta-band .btn.primary{color:var(--accent-ink)}
.cta-band a:not(.btn){color:var(--on-ink)}
/* inner pages */
.page-hero{background:var(--ink);color:var(--on-ink)}
.page-hero .wrap{padding-block:44px 40px;display:grid;gap:10px}
.page-hero .eyebrow{color:var(--on-ink-muted)}
.page-hero .lead{color:var(--on-ink-muted)}
.crumbs{font-family:var(--mono);font-size:11.5px;color:var(--on-ink-muted);letter-spacing:.04em}
.crumbs a{text-decoration:none}
section.body .wrap{max-width:860px}
section.body h2{font-size:24px;margin:30px 0 10px}
section.body h2:first-child{margin-top:0}
section.body ul{padding-left:20px}
section.body li{margin-bottom:6px}
section.body table{border-collapse:collapse;width:100%;font-size:14.5px;margin:10px 0 18px;display:block;overflow-x:auto}
section.body th,section.body td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--rule);vertical-align:top}
section.body th{font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.note{background:var(--paper-2);border-left:3px solid var(--brass);padding:12px 14px;border-radius:0 8px 8px 0;font-size:14.5px;margin:14px 0}
section.related{background:var(--paper-2)}
/* contact form & check form */
.cf,.check-form{display:grid;gap:14px;max-width:640px}
.cf label,.check-form label.t{font-weight:600;font-size:15px;display:grid;gap:6px}
.cf input,.cf textarea,.cf select,.check-form input[type=text],.check-form input[type=email],.check-form textarea{width:100%;border:1px solid var(--rule);border-radius:8px;padding:10px 12px;font:inherit;background:var(--card);color:var(--fg)}
.opts{display:flex;gap:8px;flex-wrap:wrap}
.opts label{border:1px solid var(--rule);border-radius:999px;padding:7px 13px;font-size:14px;cursor:pointer;color:var(--muted);background:var(--card);display:inline-flex;gap:6px;align-items:center}
.opts input{position:absolute;opacity:0;width:0;height:0}
.opts label:has(input:checked){border-color:var(--accent);background:#e3f2f3;color:var(--fg)}
.opts label:focus-within{outline:2px solid var(--brass);outline-offset:2px}
.check{background:var(--paper-2);border-top:1px solid var(--rule)}
.check .wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:40px;align-items:start}
@media (max-width:860px){.check .wrap{grid-template-columns:1fr}}
.check .fine{font-family:var(--mono);font-size:11px;color:var(--muted)}
.check-form{background:var(--card);border:1px solid var(--rule);border-radius:14px;padding:22px;max-width:none}
/* footer */
footer{background:var(--ink);color:var(--on-ink-muted);font-size:13.5px}
footer .wrap{padding-block:40px 44px;display:grid;gap:20px}
.cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:24px}
footer h4{color:var(--on-ink);font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;margin-bottom:8px;font-weight:500}
footer a{text-decoration:none;display:block;padding:2px 0}
footer .small{border-top:1px solid var(--line-ink);padding-top:14px;font-family:var(--mono);font-size:11px;margin:0}
footer .small a{display:inline}
.reveal{opacity:1}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}