:root{
  --brand:#6D28D9;--brand-soft:#A78BFA;--ink:#27242D;--muted:#716B78;--dark:#17151C;
  --bg:#F7F5FA;--bg-2:#ECE8F2;--accent:#F59E0B;--white:#fff;--line:#DCD6E3;
  --shell:1180px;--radius:22px;--radius-sm:14px;--shadow:0 18px 60px rgba(36,24,54,.12);
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink);line-height:1.75;text-rendering:optimizeLegibility}img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}.shell{width:min(var(--shell),calc(100% - 40px));margin-inline:auto}.narrow{width:min(860px,calc(100% - 40px));margin-inline:auto}.narrow-wide{width:min(940px,calc(100% - 40px));margin-inline:auto}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip-link{position:fixed;left:12px;top:12px;z-index:200;transform:translateY(-150%);background:var(--accent);padding:10px 14px;border-radius:10px;color:#1a1203;font-weight:700}.skip-link:focus{transform:none}.site-header{position:sticky;top:0;z-index:100;background:rgba(247,245,250,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(113,107,120,.18)}.header-inner{min-height:74px;display:flex;align-items:center;gap:28px}.brand-mark{display:flex;align-items:center;gap:11px;margin-right:auto}.brand-mark img{width:44px;height:44px;object-fit:contain;border-radius:12px}.brand-mark span{display:grid;line-height:1.15}.brand-mark strong{font-size:1.4rem;color:var(--dark)}.brand-mark small{margin-top:4px;color:var(--muted);font-size:.76rem}.site-nav{display:flex;align-items:center;gap:6px}.site-nav a{padding:9px 12px;border-radius:11px;font-size:.94rem;color:#4e4854}.site-nav a:hover,.site-nav a[aria-current="page"]{background:var(--bg-2);color:var(--brand)}.search-trigger,.menu-toggle{border:0;background:var(--dark);color:#fff;border-radius:12px;padding:9px 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.lead{color:#cfc7d7}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 18px;border-radius:12px;background:var(--brand);color:#fff;font-weight:700;border:1px solid transparent}.btn:hover{transform:translateY(-1px)}.btn-accent{background:var(--accent);color:#211706}.btn-ghost{background:transparent;border-color:rgba(255,255,255,.28);color:#fff}.text-link{display:inline-flex;align-items:center;gap:7px;color:var(--brand);font-weight:750}.text-link::after{content:"→";transition:transform .2s ease}.text-link:hover::after{transform:translateX(4px)}.home-lead{padding:58px 0 66px}.home-lead__grid{display:grid;grid-template-columns:minmax(0,1.03fr) minmax(320px,.8fr);gap:52px;align-items:center}.home-lead__copy .lead{margin-top:24px}.lead-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.home-lead__visual{margin:0}.home-lead__visual img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:30px;box-shadow:var(--shadow)}figcaption{margin-top:10px;color:var(--muted);font-size:.86rem}.section-dark figcaption{color:#aaa1b3}.lead-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:32px 0 0}.lead-facts>div{padding:14px;border-top:1px solid rgba(255,255,255,.18)}.lead-facts dt{font-size:.76rem;color:#aaa1b3}.lead-facts dd{margin:4px 0 0;font-weight:700}.split-intro{display:grid;grid-template-columns:minmax(260px,.8fr) minmax(0,1.2fr);gap:70px;align-items:start}.split-intro p{font-size:1.03rem}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:28px;margin-bottom:30px}.section-heading.wide>p{max-width:54ch;color:var(--muted)}.editorial-strip{display:grid;grid-template-columns:1.35fr .65fr .65fr;gap:18px}.strip-item{background:#fff;border-radius:18px;overflow:hidden;border:1px solid var(--line);display:flex;flex-direction:column}.strip-item--feature{grid-row:span 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small{color:var(--muted);font-size:.94rem}.topic-index__row b{font-size:1.6rem;color:var(--brand)}.guide-layout{display:grid;grid-template-columns:1fr .8fr;gap:50px;align-items:center}.guide-layout figure{margin:0}.guide-layout img{border-radius:22px;aspect-ratio:4/3;object-fit:cover}.minor-topic__grid{display:grid;grid-template-columns:1fr .65fr;gap:44px;align-items:center}.minor-topic__grid img{border-radius:18px;aspect-ratio:16/10;object-fit:cover}.faq-list{display:grid;gap:10px}.faq-list details{border:1px solid var(--line);background:#fff;border-radius:14px;padding:0 18px}.faq-list summary{padding:16px 0;font-weight:750;cursor:pointer;list-style:none}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary::after{content:"+";float:right;color:var(--brand)}.faq-list details[open] summary::after{content:"−"}.faq-list details p{padding:0 0 18px;color:var(--muted)}.faq-list--large details{padding-inline:22px}.faq-list--large summary{font-size:1.04rem;padding:20px 0}.final-map__inner{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start}.final-links{display:grid;gap:10px}.final-links a{padding:13px 16px;border:1px solid rgba(255,255,255,.16);border-radius:12px}.final-links a:hover{border-color:var(--brand-soft);background:rgba(255,255,255,.04)}.final-links.horizontal{grid-template-columns:repeat(3,1fr)}.final-links.horizontal a{border-color:var(--line);background:#fff}.page-hero{padding:48px 0 56px;background:#f0edf4}.page-hero--text{padding:54px 0 62px}.page-hero--video{background:var(--dark);color:#fff}.page-hero--minor{background:#f1ecf7}.page-hero--guide,.page-hero--faq,.page-hero--search,.page-hero--simple{background:#efebf3}.page-hero__grid{display:grid;grid-template-columns:1fr .58fr;gap:50px;align-items:center}.page-hero__grid img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:24px}.breadcrumbs{margin-bottom:24px}.breadcrumbs 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span{font-size:.88rem;color:var(--muted)}.route-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.route-cards a{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;display:grid;gap:8px}.route-cards strong{color:var(--brand)}.route-cards span{color:var(--muted);font-size:.93rem}.video-jump{display:flex;gap:10px;overflow:auto;padding-block:6px}.video-jump a{white-space:nowrap;padding:8px 13px;background:#fff;border:1px solid var(--line);border-radius:999px;color:#554f5b}.collection-section{scroll-margin-top:86px}.collection-layout{display:grid;grid-template-columns:.9fr .5fr 1fr;gap:28px;align-items:start}.collection-layout>img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:18px}.collection-copy p{color:var(--muted)}.collection-articles{display:grid;gap:12px}.next-step{display:flex;align-items:center;justify-content:space-between;gap:40px}.next-step p{max-width:70ch;color:#cfc7d7}.free-notes{display:grid;grid-template-columns:.7fr 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var(--line)}.step-list article>span{width:52px;height:52px;display:grid;place-items:center;border-radius:50%;background:var(--brand);color:#fff;font-weight:800}.step-list p{color:var(--muted)}.guide-links{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.guide-links a{padding:18px;border-radius:14px;background:#fff;border:1px solid var(--line);font-weight:700;color:var(--brand)}.safety-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.search-page-form{margin-top:24px}.search-page-form label,.search-form label{display:block;font-weight:700;margin-bottom:7px}.search-page-form>div,.search-form__row{display:flex;gap:8px}.search-page-form input,.search-form input{min-width:0;flex:1;border:1px solid #c9c2d0;border-radius:12px;padding:11px 13px;background:#fff}.search-page-form button,.search-form button{border:0;background:var(--brand);color:#fff;border-radius:12px;padding:10px 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30px));background:#fff;border-radius:22px;padding:28px;box-shadow:var(--shadow)}.search-close{position:absolute;right:14px;top:12px;border:0;background:transparent;font-size:1.8rem;color:var(--muted)}.modal-open{overflow:hidden}.back-top{position:fixed;right:18px;bottom:18px;width:44px;height:44px;border:0;border-radius:50%;background:var(--accent);color:#2b1d02;font-weight:900;box-shadow:0 8px 24px rgba(0,0,0,.15);z-index:80}.site-footer{background:#121015;color:#d3ccd8;padding:58px 0 22px}.footer-grid{display:grid;grid-template-columns:1.3fr repeat(3,.7fr);gap:38px}.footer-grid h2{font-size:.95rem;color:#fff;margin-bottom:12px}.footer-grid>div:not(.footer-intro){display:grid;align-content:start;gap:8px}.footer-grid a{font-size:.9rem;color:#bbb2c2}.footer-grid a:hover{color:#fff}.footer-intro p{max-width:40ch;color:#aaa1b3}.brand-word{font-size:2.2rem;font-weight:900;color:#fff;margin-bottom:10px}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.1);padding-top:20px;margin-top:35px;font-size:.8rem;color:#8f8796}.reveal-ready{opacity:0;transform:translateY(12px);transition:opacity .45s ease,transform .45s ease}.reveal-ready.is-visible{opacity:1;transform:none}@media (prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media(max-width:1024px){.header-inner{gap:16px}.site-nav{gap:2px}.site-nav a{padding-inline:9px}.home-lead__grid,.page-hero__grid{grid-template-columns:1fr .7fr;gap:32px}.editorial-strip{grid-template-columns:1fr 1fr}.strip-item--feature{grid-row:auto}.strip-item:nth-child(4){grid-column:auto}.article-grid{grid-template-columns:repeat(2,1fr)}.collection-layout{grid-template-columns:.9fr .55fr}.collection-articles{grid-column:1/-1;grid-template-columns:repeat(3,1fr)}.article-layout{grid-template-columns:1fr 290px}.footer-grid{grid-template-columns:1fr 1fr}.footer-intro{grid-column:1/-1}}
@media(max-width:820px){.menu-toggle{display:block}.site-nav{position:absolute;left:20px;right:20px;top:66px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:10px;box-shadow:var(--shadow);display:none;flex-direction:column;align-items:stretch}.site-nav.is-open{display:flex}.site-nav a{padding:11px 12px}.search-trigger{display:none}.home-lead__grid,.page-hero__grid,.two-column-flow,.free-band,.guide-layout,.minor-topic__grid,.content-split,.free-notes,.final-map__inner{grid-template-columns:1fr}.home-lead__visual{order:-1}.home-lead__visual img{aspect-ratio:16/9}.lead-facts{grid-template-columns:1fr}.split-intro{grid-template-columns:1fr;gap:20px}.section-heading{align-items:start;flex-direction:column}.editorial-strip,.article-grid,.route-cards,.three-notes,.final-links.horizontal,.guide-links,.safety-grid{grid-template-columns:1fr 1fr}.collection-layout{grid-template-columns:1fr .55fr}.topic-board article{grid-template-columns:190px 1fr}.article-layout{grid-template-columns:1fr}.article-aside{position:static}.free-notes>img{position:static;aspect-ratio:16/9}.not-found__inner{grid-template-columns:1fr}.not-found__code{display:none}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.shell,.narrow,.narrow-wide,.article-shell{width:min(100% - 28px,var(--shell))}.section{padding:54px 0}.home-lead{padding-top:26px}h1{font-size:2.35rem}.lead{font-size:1.02rem}.editorial-strip,.article-grid,.route-cards,.three-notes,.final-links.horizontal,.guide-links,.safety-grid,.compact-grid,.article-listing{grid-template-columns:1fr}.topic-index__row{grid-template-columns:76px 1fr auto;gap:14px}.topic-index__row img{width:76px}.topic-index__row small{font-size:.86rem}.collection-layout{grid-template-columns:1fr}.collection-articles{grid-template-columns:1fr}.topic-board article{grid-template-columns:1fr}.topic-board article img{aspect-ratio:16/9}.step-list article{grid-template-columns:48px 1fr;gap:16px}.step-list article>span{width:42px;height:42px}.search-page-form>div,.search-form__row{flex-direction:column}.footer-grid{grid-template-columns:1fr}.footer-intro{grid-column:auto}.footer-bottom{flex-direction:column}.page-hero__grid img{aspect-ratio:16/9}.free-notes__list article{grid-template-columns:42px 1fr}.brand-mark small{display:none}}
@media(max-width:375px){.header-inner{min-height:66px}.brand-mark img{width:38px;height:38px}.brand-mark strong{font-size:1.25rem}.menu-toggle{width:40px;height:40px}.home-lead__grid{gap:24px}.lead-actions{flex-direction:column}.lead-actions .btn{width:100%}.topic-index__row{grid-template-columns:60px 1fr}.topic-index__row img{width:60px}.topic-index__row b{display:none}}

.handbook-list{display:grid;gap:28px}.handbook-entry{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden}.handbook-entry__head{padding:26px 28px 20px;background:linear-gradient(180deg,#fff,#f8f5fb)}.handbook-entry__head>span{display:inline-block;color:var(--brand);font-weight:800;font-size:.76rem;letter-spacing:.08em;margin-bottom:8px}.handbook-entry__head h2{font-size:1.45rem;margin-bottom:10px}.handbook-entry__head p{color:var(--muted);margin:0}.handbook-entry__body{padding:24px 28px 28px}.handbook-entry__body p{color:#4f4856}.handbook-entry__body h3{margin:25px 0 10px}.handbook-entry__body ol{margin:0;padding-left:1.35rem;display:grid;gap:8px;color:#5f5867}.handbook-pagination{padding:28px 0 50px}.pagination{display:flex;justify-content:center;gap:8px}.pagination a{width:42px;height:42px;display:grid;place-items:center;border:1px solid var(--line);background:#fff;border-radius:10px;font-weight:800}.pagination a[aria-current="page"]{background:var(--brand);color:#fff;border-color:var(--brand)}
@media(max-width:600px){.handbook-entry__head,.handbook-entry__body{padding-left:19px;padding-right:19px}.handbook-entry__head h2{font-size:1.25rem}}