:root{--base:#f6f8f8;--paper:#fff;--soft:#eaf0f2;--navy:#122e3b;--deep:#1a4050;--accent:#168e96;--link:#226d9d;--heading:#193946;--body:#374d58;--muted:#647981;--line:#d9e3e6;font-family:Arial,'PingFang SC','Microsoft YaHei',sans-serif;color:var(--body);background:var(--base)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:94px}body{margin:0;font-size:16px;line-height:1.8}img{max-width:100%;height:auto}a{color:var(--link);text-decoration-thickness:1px;text-underline-offset:3px}a:hover{text-decoration:underline}a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}h1,h2,h3{line-height:1.32;color:var(--heading);margin-top:0;letter-spacing:.015em}h1{font-size:clamp(26px,3.3vw,42px)}h2{font-size:clamp(21px,2.3vw,28px)}h3{font-size:19px}p{margin:0 0 1.1em}section,article{min-width:0}.container{width:min(100% - 56px,1220px);margin-inline:auto}.section-block{margin-block:56px}.eyebrow{display:inline-block;font-weight:700;letter-spacing:.09em;color:var(--accent);font-size:13px;margin-bottom:10px}.lead{font-size:17px;line-height:1.85;max-width:780px}.muted{color:var(--muted)}.intro-band{padding:48px 0 26px;border-bottom:1px solid var(--line)}.intro-band .lead{margin-bottom:20px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:16px;border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:24px}.section-heading p{margin:0;max-width:380px}.tag{display:inline-block;font-size:12px;font-weight:700;color:var(--accent);letter-spacing:.06em}.soft-panel{background:var(--soft);border-radius:12px;padding:24px}.dark-panel{background:var(--deep);color:#eff8fa;border-radius:12px;padding:26px}.dark-panel h2,.dark-panel h3{color:white}.rule-line{border-top:1px solid var(--line);padding-top:24px}.reading-prose{max-width:780px}.reading-prose h2{margin-top:35px}.reading-prose h3{margin-top:26px}.reading-prose p{line-height:1.85}.note{border-left:3px solid var(--accent);padding:8px 18px;background:var(--soft);color:var(--body);margin:22px 0}.article-wide{max-width:1040px;margin-inline:auto}.two-col{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:34px;align-items:start}.two-col--reverse{grid-template-columns:minmax(0,1fr) minmax(0,1.3fr)}.side-grid{display:grid;grid-template-columns:220px minmax(0,1fr);gap:42px}.three-col{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.columns-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.section-kicker{font-size:13px;font-weight:700;color:var(--accent)}.number{font-weight:700;color:var(--accent);font-size:14px}.text-link{font-weight:700}.item-outline{padding:0 0 22px;border-bottom:1px solid var(--line)}.item-outline h3{margin:7px 0}.micro-list{margin:8px 0 0;padding-left:20px}.micro-list li{margin-bottom:8px}.step-list{list-style:none;counter-reset:phase;padding:0;margin:20px 0}.step-list li{counter-increment:phase;display:grid;grid-template-columns:42px 1fr;gap:12px;padding:18px 0;border-top:1px solid var(--line)}.step-list li:before{content:counter(phase,decimal-leading-zero);color:var(--accent);font-weight:800;font-size:20px}.step-list li strong{display:block;color:var(--heading)}.small-index{display:flex;gap:12px;flex-wrap:wrap;margin:16px 0 26px}.small-index a{background:var(--soft);padding:5px 12px;border-radius:6px;font-size:14px}.sticky-index{position:sticky;top:105px;border-top:3px solid var(--accent);padding-top:18px}.sticky-index a{display:block;padding:9px 0;border-bottom:1px solid var(--line)}.image-holder{display:flex;justify-content:center;align-items:center;width:100%;min-width:0;margin:0;padding:8px;background:var(--soft);border-radius:12px}.image-holder img{display:block;width:auto;height:auto;max-width:100%;max-height:var(--image-limit,210px);object-fit:contain;object-position:center}.image-holder--hero{--image-limit:290px}.image-holder--feature{--image-limit:240px}.image-holder--inline{--image-limit:180px}.image-holder--rules{--image-limit:210px}.image-holder--banner{--image-limit:190px}.image-holder--portrait{--image-limit:330px;max-width:310px;margin-inline:auto}.image-missing{font-size:13px;color:var(--muted);border:1px dashed var(--line);padding:8px 12px;border-radius:6px;max-width:max-content}.figure-caption{font-size:13px;color:var(--muted);margin-top:8px}.table-wrap{overflow-x:auto;max-width:100%;border:1px solid var(--line);border-radius:9px;background:var(--paper)}table{border-collapse:collapse;width:100%;min-width:560px;font-size:15px}caption{text-align:left;font-weight:700;color:var(--heading);padding:15px 16px}th,td{padding:12px 15px;text-align:left;border-top:1px solid var(--line);vertical-align:top}th{background:var(--soft);color:var(--heading)}.related{margin:62px 0 54px;padding-top:25px;border-top:2px solid var(--navy)}.related-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.related-list a{border-bottom:1px solid var(--line);padding:12px 0;font-weight:700}.faq{max-width:990px}.faq details{border-top:1px solid var(--line);padding:12px 6px}.faq details:last-child{border-bottom:1px solid var(--line)}.faq summary{cursor:pointer;font-weight:700;color:var(--heading);padding:5px 0}.faq details p{margin:12px 0;max-width:760px}.home-hero{display:grid;grid-template-columns:minmax(0,1.38fr) minmax(0,1fr);gap:38px;align-items:center;padding:52px 0 44px;border-bottom:1px solid var(--line)}.home-hero .image-holder{max-width:100%}.home-hero p{max-width:650px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.hero-actions a{display:inline-flex;align-items:center;min-height:42px;border:1px solid var(--line);padding:6px 18px;border-radius:6px;font-weight:700}.hero-actions a:first-child{background:var(--navy);color:#fff;border-color:var(--navy)}.route-row{display:grid;grid-template-columns:1fr 1fr;gap:24px;padding:20px 0;border-bottom:1px solid var(--line)}.route-entry{display:grid;grid-template-columns:34px 1fr;gap:12px}.route-entry h3{font-size:19px;margin:0 0 6px}.route-entry p{margin:0 0 5px}.feature-summary{padding-right:20px}.feature-summary h3{font-size:20px}.editorial-list{display:grid;gap:20px}.phase-strip{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border-top:2px solid var(--navy)}.phase-strip>div{padding:18px;border-right:1px solid var(--line)}.phase-strip>div:last-child{border-right:0}.phase-strip h3{font-size:18px;margin:7px 0}.site-header{background:var(--navy);color:#f4fafb;position:relative;z-index:20}.header-inner{width:min(100% - 56px,1220px);margin:auto;display:flex;align-items:center;gap:24px;min-height:76px}.brand{display:flex;align-items:center;gap:9px;flex:none;white-space:nowrap;text-decoration:none;color:#fff}.brand img{display:block;width:auto;height:auto;max-height:38px;max-width:145px;object-fit:contain}.brand small{font-size:10px;letter-spacing:.09em;opacity:.8}.brand-text{font-weight:800;font-size:22px}.desktop-nav{display:flex;gap:clamp(8px,1.05vw,19px);margin-left:auto;align-items:center;white-space:nowrap;min-width:0}.desktop-nav a{color:#eaf6f8;text-decoration:none;font-size:clamp(12px,.95vw,14px);padding:24px 0 21px;border-bottom:3px solid transparent}.desktop-nav a[aria-current=page]{font-weight:800;border-color:#69c4c9;color:#fff}.desktop-nav a:hover{border-color:#69c4c9}.entry-link{display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;flex:none;padding:5px 13px;border:1px solid #87bfc4;border-radius:5px;color:#fff;font-weight:700;text-decoration:none;font-size:13px}.mobile-menu{display:none}.skip-link{position:absolute;left:-9999px;top:0;background:#fff;padding:10px;z-index:100}.skip-link:focus{left:8px}.breadcrumb{font-size:14px;padding-top:22px;color:var(--muted)}.breadcrumb span{margin:0 5px}.site-footer{background:#0c2632;color:#d9e8eb;margin-top:65px;padding:42px 0 20px}.footer-grid{display:grid;grid-template-columns:1.3fr 1.2fr .9fr;gap:42px}.site-footer a{color:#e2f3f7}.site-footer h2{font-size:16px;color:#fff}.site-footer p{font-size:14px}.footer-brand{color:#fff;font-weight:800;font-size:20px;text-decoration:none}.footer-brand small{font-size:11px;margin-left:6px}.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px;font-size:14px}.footer-bottom{border-top:1px solid #37515b;margin-top:30px;padding-top:16px;font-size:12px;color:#bfd3d8}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:1190px){.header-inner{gap:13px}.brand small{display:none}.desktop-nav{gap:10px}.desktop-nav a{font-size:12px}.entry-link{padding-inline:9px}.container,.header-inner{width:min(100% - 44px,1220px)}}
@media(max-width:980px){.header-inner{min-height:64px;justify-content:space-between}.desktop-nav{display:none}.brand{margin-inline:auto}.brand small{display:inline}.brand img{max-height:30px;max-width:135px}.mobile-menu{display:block;flex:0 0 66px;align-self:center}.mobile-menu summary{display:flex;align-items:center;justify-content:center;cursor:pointer;width:42px;height:42px;border:1px solid #6c9da5;border-radius:6px;list-style:none;font-size:23px;color:#fff}.mobile-menu summary::-webkit-details-marker{display:none}.mobile-menu[open] .hamburger{font-size:0}.mobile-menu[open] .hamburger:before{content:'×';font-size:26px}.mobile-panel{position:absolute;top:100%;left:0;right:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;background:#193946;padding:22px max(22px,calc((100vw - 1220px)/2));box-shadow:0 10px 18px #0002}.mobile-panel .menu-group{display:grid;align-content:start;gap:7px}.mobile-panel strong{color:#84ccd1;font-size:13px}.mobile-panel a{color:#fff;padding:5px 0;text-decoration:none}.entry-link{flex:0 0 auto}.footer-grid{grid-template-columns:1fr 1fr}.footer-note{grid-column:1/-1}.side-grid{grid-template-columns:1fr;gap:20px}.sticky-index{position:static}.sticky-index a{display:inline-block;margin-right:15px}}
@media(max-width:760px){.two-col,.two-col--reverse,.three-col,.columns-2,.home-hero{grid-template-columns:1fr}.home-hero{padding-top:34px;gap:22px}.home-hero .image-holder{max-width:560px}.section-block{margin-block:38px}.phase-strip{grid-template-columns:repeat(2,minmax(0,1fr))}.phase-strip>div:nth-child(2){border-right:0}.phase-strip>div:nth-child(-n+2){border-bottom:1px solid var(--line)}.related-list{grid-template-columns:1fr}.intro-band{padding-top:30px}.feature-summary{padding:0}}
@media(max-width:640px){.container,.header-inner{width:calc(100% - 32px)}body{font-size:15px}.home-hero p,.lead{font-size:16px}h1{font-size:28px}h2{font-size:22px}.section-block{margin-block:32px}.route-row{grid-template-columns:1fr;gap:16px}.route-entry{grid-template-columns:30px 1fr}.mobile-menu{flex-basis:44px}.brand small{display:none}.brand-text{font-size:18px}.entry-link{font-size:12px;padding:5px 8px}.mobile-panel{grid-template-columns:1fr;gap:18px;padding:16px 20px;max-height:75vh;overflow-y:auto}.mobile-panel .menu-group{gap:2px}.mobile-panel a{padding:4px 0}.image-holder--hero{--image-limit:195px}.image-holder--feature{--image-limit:180px}.image-holder--inline{--image-limit:140px}.image-holder--rules{--image-limit:165px}.image-holder--banner{--image-limit:125px}.image-holder--portrait{--image-limit:275px;max-width:240px}.soft-panel,.dark-panel{padding:18px}.footer-grid{grid-template-columns:1fr;gap:18px}.footer-note{grid-column:auto}.footer-links{grid-template-columns:repeat(2,minmax(0,1fr))}.step-list li{grid-template-columns:35px 1fr;gap:8px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}