:root{--bg:#10151D;--surface:#19212C;--raised:#222C38;--title:#F7F5F2;--text:#E0E4E8;--muted:#BBC4CC;--coral:#FF6B7D;--blue:#9CC5DB;--line:#34414F;--width:1200px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;font-size:16px;line-height:1.75;overflow-x:hidden}a{color:inherit;text-underline-offset:4px}a:hover{color:var(--coral)}a:active,button:active{opacity:.8}a:focus-visible,button:focus-visible{outline:3px solid var(--blue);outline-offset:3px}button{font:inherit;cursor:pointer}img{display:block;max-width:100%}.wrap{max-width:var(--width);margin-inline:auto;padding-inline:32px}.skip{position:absolute;z-index:50;left:12px;top:-80px;padding:10px 16px;background:var(--title);color:var(--bg)}.skip:focus{top:8px}.site-header{background:var(--bg);border-bottom:1px solid var(--line);position:relative;z-index:20}.brandbar{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;min-width:0}.brand img{width:auto;max-width:130px;height:40px;object-fit:contain}.brand-symbol{width:40px;height:40px;border:2px solid var(--coral);border-radius:9px;display:grid;place-items:center;color:var(--title);font-weight:800;font-size:15px}.brand strong{display:block;font-size:21px;letter-spacing:.03em;color:var(--title);line-height:1.16}.brand small{font-size:10px;letter-spacing:.12em;color:var(--muted);display:block;margin-top:2px}.header-actions{display:flex;align-items:center;gap:22px}.guide{text-decoration:none;font-size:14px}.menu-toggle,.menu-close{min-height:44px;padding:7px 16px;border:1px solid var(--line);background:var(--raised);color:var(--title);border-radius:9px}.menu-lines{font-size:16px;margin-right:5px}.primary-nav{height:48px;border-top:1px solid var(--line)}.primary-inner{display:flex;align-items:center;height:100%;justify-content:space-between;gap:16px}.primary-inner a{display:flex;align-items:center;height:100%;font-size:14px;white-space:nowrap;text-decoration:none;border-bottom:2px solid transparent}.primary-inner a[aria-current]{border-color:var(--coral);color:var(--title);font-weight:700}.menu-panel{position:absolute;top:100%;left:0;right:0;background:var(--surface);border:1px solid var(--line);border-top:0;box-shadow:0 24px 44px #0007;padding-block:22px 26px;max-height:min(78vh,850px);overflow-y:auto}.menu-panel[hidden]{display:none!important}.menu-panel-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:14px}.menu-panel-top strong{color:var(--title);font-size:22px}.menu-groups{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}.menu-groups h2{font-size:16px;color:var(--blue);margin:24px 0 12px}.menu-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 12px}.menu-links a{padding:7px 2px;text-decoration:none;font-size:14px}.menu-links a[aria-current]{color:var(--coral);font-weight:700}.menu-home{display:inline-block;margin-top:22px;color:var(--blue)}h1,h2,h3{color:var(--title);line-height:1.3;letter-spacing:-.02em}h1{font-size:clamp(28px,3.5vw,38px);margin:0 0 24px}h2{font-size:clamp(23px,2.6vw,27px)}h3{font-size:20px}p{margin:0 0 16px}section{min-width:0}.eyebrow{color:var(--blue);letter-spacing:.16em;font-size:13px;font-weight:700}.page-hero{padding-top:62px;padding-bottom:35px}.page-hero .lead{max-width:850px;color:var(--muted);font-size:18px}.home-hero{padding-top:28px}.hero-ribbon{display:flex;justify-content:space-between;gap:15px;align-items:center;margin:0 0 16px;font-size:13px;letter-spacing:.07em;color:var(--muted)}.hero-ribbon b{color:var(--title)}.media{width:100%;aspect-ratio:16/9;border:1px solid var(--line);border-radius:12px;background:var(--raised);overflow:hidden;display:grid;place-items:center}.media img{width:100%;height:100%;object-fit:contain;object-position:center}.media-fallback{height:100%;width:100%;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:12px;min-width:0;color:var(--text);text-align:center;padding:24px;font-size:20px;font-weight:700;letter-spacing:.06em;background:radial-gradient(circle at 70% 30%,#2c3947 0%,transparent 40%),var(--raised)}.fallback-mark{width:55px;height:6px;border-radius:5px;background:var(--coral);box-shadow:17px 14px 0 -1px var(--blue)}.hero-media{height:min(25vw,320px);min-height:190px;aspect-ratio:auto}.hero-copy{padding-top:24px;max-width:850px}.hero-copy p{font-size:17px;color:var(--muted)}.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;min-height:44px;padding:10px 18px;border:1px solid var(--line);border-radius:9px;font-weight:600}.btn.primary{background:var(--coral);color:#10151D;border-color:var(--coral)}.btn:hover{transform:translateY(-1px)}.section{margin-block:68px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:12px;margin-bottom:22px}.section-head h2{margin:4px 0}.section-head a{color:var(--blue);white-space:nowrap}.grid{display:grid;gap:18px;min-width:0}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.editorial-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:18px}.stack{display:grid;gap:18px}.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:22px;min-width:0;overflow:hidden}.card .media{margin-bottom:18px;aspect-ratio:1.75}.card h3{margin:5px 0 10px}.card p{color:var(--muted);font-size:15px}.card a.more{font-size:14px;color:var(--blue);font-weight:600}.card.feature .media{aspect-ratio:1.9}.card.feature p{font-size:16px}.topic-card{border-top:2px solid var(--line)}.topic-card h3{margin:0 0 12px}.topic-number{color:var(--coral);font-size:13px;display:block;margin-bottom:13px}.dual{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.dual .card .media{aspect-ratio:2.25}.card ul{padding-left:22px;margin:16px 0;color:var(--muted)}.link-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 20px}.link-list a{padding:12px 0;border-bottom:1px solid var(--line);text-decoration:none}.trust{border-left:3px solid var(--coral);padding:4px 0 4px 22px;max-width:850px;color:var(--muted)}.article-shell{padding-bottom:45px}.article-intro{margin-bottom:25px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 235px;gap:38px;align-items:start}.article-body{min-width:0}.article-body .article-media{margin-bottom:32px;max-height:280px;aspect-ratio:2.3}.article-section{padding:26px 0 30px;border-bottom:1px solid var(--line)}.article-section:first-of-type{padding-top:8px}.article-section h2{margin:0 0 18px}.article-section p{margin-bottom:15px}.article-side{position:sticky;top:20px;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px}.article-side h2{font-size:17px;margin:0 0 12px}.article-side a{display:block;padding:9px 0;border-top:1px solid var(--line);text-decoration:none;font-size:14px}.article-end{background:var(--surface);border:1px solid var(--line);border-radius:12px;margin-top:35px;padding:22px}.article-end h2{font-size:21px;margin:0 0 10px}.article-end a{color:var(--blue)}.faq-list{max-width:880px;margin:28px auto 70px}.faq-item{border-bottom:1px solid var(--line);padding:18px 0}.faq-item h2{font-size:20px;margin:0 0 12px}.faq-item p{color:var(--text)}.site-footer{background:var(--surface);border-top:1px solid var(--line);margin-top:60px;padding:50px 0 0}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:28px}.footer-brand{font-size:21px;font-weight:700;color:var(--title);text-decoration:none}.footer-brand span{display:block;font-size:11px;letter-spacing:.16em;color:var(--muted)}.footer-grid p{max-width:340px;font-size:14px;color:var(--muted);margin-top:12px}.footer-grid h2{font-size:16px;margin:4px 0 16px}.footer-grid a:not(.footer-brand){display:block;font-size:14px;text-decoration:none;margin:8px 0}.footer-bottom{display:flex;justify-content:space-between;gap:20px;padding-top:23px;padding-bottom:25px;margin-top:36px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}.mobile-bottom{display:none}
@media(max-width:1024px){.wrap{padding-inline:24px}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.primary-inner{gap:10px}.primary-inner a{font-size:13px}.menu-groups{grid-template-columns:1fr 1fr}.article-layout{grid-template-columns:minmax(0,1fr) 195px;gap:24px}}
@media(max-width:767px){.wrap{padding-inline:16px}.brandbar{height:60px}.brand strong{font-size:19px}.brand img{max-width:98px;height:34px}.guide{font-size:13px}.header-actions{gap:10px}.menu-toggle{padding:7px 12px}.primary-nav{display:none}.menu-panel{position:relative;top:auto;width:100%;max-height:none;box-shadow:none}.menu-groups,.editorial-grid,.dual,.grid-3,.article-layout{grid-template-columns:minmax(0,1fr)}.menu-links{grid-template-columns:repeat(2,minmax(0,1fr))}.page-hero{padding-top:35px;padding-bottom:15px}.page-hero .lead{font-size:16px}.section{margin-block:42px}.hero-media{height:auto;min-height:0;aspect-ratio:16/9;max-height:220px}.hero-copy h1{margin-bottom:12px}.hero-copy p{font-size:16px}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.section-head{align-items:start}.section-head h2{font-size:23px}.article-side{position:static;order:-1;display:block}.article-side a{display:inline-block;margin-right:12px;border:0}.article-body .article-media{aspect-ratio:16/9;max-height:240px}.article-section{padding-block:22px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.footer-bottom{display:block;padding-bottom:100px}.footer-bottom a{display:block;margin-top:10px}.mobile-bottom{position:fixed;display:grid;grid-template-columns:repeat(4,1fr);bottom:0;left:0;right:0;z-index:15;background:#19212cf7;border-top:1px solid var(--line);padding:5px 4px calc(5px + env(safe-area-inset-bottom));backdrop-filter:blur(12px)}.mobile-bottom a{min-height:52px;display:flex;align-items:center;justify-content:center;flex-direction:column;font-size:12px;text-decoration:none;color:var(--muted)}.mobile-bottom a span{font-size:20px;line-height:22px}.mobile-bottom a[aria-current]{color:var(--coral);font-weight:700}.site-footer{margin-top:35px}.faq-list{margin-bottom:45px}}
@media(max-width:440px){.grid-4,.grid-2{grid-template-columns:1fr}.card{padding:20px}.hero-ribbon{font-size:11px}.guide{display:none}.section-head a{font-size:13px}.menu-links{gap:2px 6px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.brand small{font-size:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn:hover{transform:none}}