:root{--bg:#0c111b;--surface:#151c2a;--surface-2:#1d2636;--ink:#f7f6f1;--muted:#a3afc0;--line:#303b4c;--orange:#f6a85b;--mint:#a9e4d1;--radius:20px;--max:1200px;--reading:700px;color-scheme:dark}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}body::before{content:"";pointer-events:none;position:absolute;top:0;left:0;width:100%;height:720px;background:radial-gradient(ellipse at 83% 12%,#334b5d66,transparent 48%),radial-gradient(ellipse at 10% 35%,#3a2b2544,transparent 45%);z-index:-1}a{color:inherit;text-decoration:none}a:hover{color:var(--orange)}button{font:inherit}img{display:block;max-width:100%;object-fit:cover}h1,h2,h3,h4,p,figure{margin-top:0}h1,h2,h3{line-height:1.24;letter-spacing:-.035em}h1{font-size:clamp(2.7rem,5.5vw,5.6rem);font-weight:800}h2{font-size:clamp(2rem,3.5vw,3.4rem);font-weight:750}h3{font-size:clamp(1.25rem,2vw,1.7rem)}p{color:var(--muted)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:4px}.shell{width:min(calc(100% - 64px),var(--max));margin-inline:auto}.skip-link{position:absolute;transform:translateY(-150%);z-index:100;background:#fff;color:#111;padding:12px 20px}.skip-link:focus{transform:translateY(0)}.masthead{position:sticky;top:0;z-index:50;background:#0c111bdf;backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid #ffffff14}.masthead-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:86px}.brand{display:flex;align-items:center;gap:13px;font-size:1.36rem;line-height:1.1;font-weight:800;letter-spacing:.03em;white-space:nowrap}.brand small{font-size:10px;letter-spacing:.13em;color:var(--muted);display:block;font-weight:500;margin-top:6px}.brand-icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,var(--orange),#f7d3a0);color:#161d28;box-shadow:0 7px 25px 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17px;font-size:12px;font-weight:650;margin-bottom:28px}.status-dot{width:7px;height:7px;background:var(--mint);border-radius:50%;box-shadow:0 0 0 4px #a9e4d120}.hero h1{max-width:760px;letter-spacing:-.065em;margin-bottom:30px}.hero h1 span{display:block;color:var(--orange);font-size:.66em;line-height:1.32;letter-spacing:-.045em;margin-top:8px}.hero-lead{max-width:570px;font-size:clamp(1.06rem,1.55vw,1.27rem);line-height:1.95;color:#c8cfda}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:38px}.button{display:inline-flex;align-items:center;justify-content:center;gap:15px;border-radius:12px;padding:13px 23px;font-size:.89rem;font-weight:750;transition:transform .2s,background .2s,border-color .2s;min-height:52px}.button:hover{transform:translateY(-2px)}.button-primary{background:var(--orange);color:#18202c}.button-primary:hover{background:#ffbd7c;color:#18202c}.button-quiet{border:1px solid #ffffff37;color:#f1f1f1}.button-quiet:hover{background:#ffffff13;color:#fff}.button-outline{border:1px solid var(--orange);color:var(--orange)}.button-outline:hover{background:var(--orange);color:#131a26}.hero-foot{display:flex;flex-wrap:wrap;gap:8px 24px;color:#899bad;font-size:.75rem;margin-top:47px}.hero-foot span::before{content:"✓";color:var(--mint);padding-right:7px}.hero-visual{position:relative;min-height:490px;border-radius:28px;background:linear-gradient(160deg,#314052,#1d2938);border:1px solid #ffffff20;box-shadow:0 35px 80px #0004;overflow:hidden;isolation:isolate}.hero-visual>img{position:absolute;inset:0;width:100%;height:100%;opacity:.86}.hero-visual:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 38%,#0e1525 94%);z-index:0}.visual-caption{position:absolute;z-index:1;left:36px;right:30px;bottom:37px;display:grid;gap:3px}.visual-caption 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strong{font-size:1.2rem;font-weight:650}.topic-links>a>span:last-child{justify-self:end;font-size:1.4rem}.topic-links>a:hover strong{color:var(--orange)}.closing-banner{display:grid;grid-template-columns:1fr 320px;gap:50px;background:linear-gradient(118deg,#2c3544,#182a37);border:1px solid #ffffff22;border-radius:22px;padding:54px 65px;margin-bottom:125px;align-items:center;overflow:hidden}.closing-banner h2{max-width:680px}.closing-banner p:not(.eyebrow){max-width:580px}.closing-banner .button{margin-top:10px}.closing-banner img{width:100%;max-height:290px;border-radius:14px;transform:rotate(4deg)}.site-footer{background:#080c13;border-top:1px solid var(--line);padding-top:72px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:80px;padding-bottom:65px}.footer-brand{font-size:1.65rem;font-weight:800;margin-bottom:16px}.footer-grid p{max-width:400px;font-size:.85rem}.footer-grid h2{font-size:1rem;margin:0 0 20px}.footer-grid a{display:block;color:#a6b2c3;font-size:.9rem;margin-bottom:11px}.footer-grid a:hover{color:var(--orange)}.copyright{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;padding-block:23px;border-top:1px solid var(--line);font-size:.75rem;color:#8492a6}.article-wrap{padding-top:35px;padding-bottom:115px}.crumbs{display:flex;align-items:center;gap:12px;color:#8899ad;font-size:.82rem;margin:20px 0 60px}.crumbs a{color:#c6d0dd}.topic-header{max-width:960px;padding-bottom:62px}.topic-header h1{font-size:clamp(2.5rem,5vw,4.8rem);max-width:960px;margin:15px 0 27px}.topic-header .lead{font-size:1.16rem;color:#bac6d4;max-width:780px;line-height:2}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 245px;gap:78px;align-items:start}.prose{min-width:0;max-width:800px}.prose .article-banner{margin:0 0 55px}.article-banner img{width:100%;height:340px;border-radius:18px;background:#1c2937}.article-banner figcaption{color:#8293a4;font-size:.79rem;padding:12px 4px}.prose h2{font-size:clamp(1.6rem,2.6vw,2.4rem);margin:60px 0 24px;padding-top:5px}.prose h2:first-of-type{margin-top:25px}.prose h3{font-size:1.15rem;margin-bottom:8px}.prose p{color:#b9c5d4;line-height:2.1;letter-spacing:.005em;margin-bottom:23px}.prose strong{color:var(--ink)}.comparison{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border:1px solid var(--line);border-radius:15px;overflow:hidden;margin:32px 0;background:#192432}.comparison>div{padding:25px;display:flex;flex-direction:column;gap:13px}.comparison>div+div{border-left:1px solid var(--line)}.comparison strong{color:var(--orange);font-size:1.08rem}.comparison span{font-size:.82rem;color:#aebdcc}.checklist{border-top:1px solid var(--line);margin:22px 0 40px}.check-item{display:grid;grid-template-columns:55px 1fr;gap:10px;border-bottom:1px solid var(--line);padding:26px 0}.check-item>span{color:var(--orange);font-size:1.45rem;font-weight:800;line-height:1.1}.check-item 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p:not(.eyebrow){font-size:.8rem}.article-next{background:#1c2838;border-radius:18px;padding:32px 35px;margin-top:65px;border:1px solid #ffffff20;display:flex;flex-direction:column;gap:10px}.article-next span{font-size:.86rem;color:#a6b5c7}.article-next a{font-size:1.07rem;font-weight:750;color:var(--orange)}.faq-page{padding:35px 0 125px}.faq-page .topic-header{padding-bottom:40px}.faq-intro{display:grid;grid-template-columns:280px 1fr;gap:50px;align-items:center;padding:25px;background:#1b2837;border-radius:20px;border:1px solid var(--line);margin:0 0 60px}.faq-intro img{width:100%;height:210px;border-radius:12px}.faq-intro h2{font-size:2rem}.faq-intro p:not(.eyebrow){max-width:670px}.faq-list{max-width:920px;margin:auto;border-top:1px solid var(--line)}.faq-entry{border-bottom:1px solid var(--line)}.faq-entry summary{list-style:none;cursor:pointer;position:relative;padding:27px 55px 27px 5px;font-size:1.1rem;font-weight:700}.faq-entry summary::-webkit-details-marker{display:none}.faq-entry summary::after{content:"+";position:absolute;right:10px;top:22px;font-size:1.6rem;color:var(--orange);font-weight:400}.faq-entry[open] summary::after{content:"−"}.faq-entry[open] summary{color:var(--orange)}.faq-answer{padding:0 58px 25px 5px;max-width:870px}.faq-answer p{line-height:2;margin:0}.faq-bottom{text-align:center;margin-top:80px}.faq-bottom h2{font-size:2rem}.faq-buttons{display:flex;gap:14px;flex-wrap:wrap;justify-content:center;margin-top:25px}.faq-buttons a{background:#1c2635;border:1px solid var(--line);padding:13px 20px;border-radius:10px;font-weight:650;font-size:.85rem}.faq-buttons a:hover{color:var(--orange);border-color:var(--orange)}
@media(min-width:1450px){.hero{padding-block:125px 105px}.hero-visual{min-height:540px}.section-space{padding-block:145px}}
@media(max-width:1080px){.shell{width:min(calc(100% - 48px),var(--max))}.masthead-inner{min-height:76px}.nav a{font-size:12px;padding:10px}.hero{gap:28px;padding-block:70px}.hero-visual{min-height:430px}.editorial-copy{padding:38px}.article-layout{gap:38px;grid-template-columns:minmax(0,1fr) 210px}.section-head{gap:30px}.footer-grid{gap:40px}}
@media(max-width:820px){.nav-toggle{display:block}.nav{display:none;position:absolute;top:100%;left:0;right:0;background:#111a27;padding:15px 24px 23px;border-bottom:1px solid var(--line);box-shadow:0 20px 45px #0006;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px}.nav.is-open{display:grid}.nav a{padding:13px 15px;font-size:.9rem}.hero{grid-template-columns:1fr;padding-block:63px 70px}.hero-visual{min-height:370px;max-height:430px}.hero h1{max-width:700px}.feature-strip{grid-template-columns:1fr}.feature-strip>a{padding:20px 25px}.feature-strip>a+a{border-left:0;border-top:1px solid var(--line)}.section-space{padding-block:85px}.section-contrast{padding-block:85px}.section-head{display:block;margin-bottom:30px}.section-head>p{max-width:650px;margin-top:18px}.editorial-grid{grid-template-columns:1fr}.editorial-image{height:340px;min-height:0}.editorial-copy{padding:35px}.resource-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.split-head{grid-template-columns:1fr;gap:30px}.split-photo{min-height:300px;max-height:440px}.closing-banner{grid-template-columns:1fr;padding:42px;margin-bottom:85px}.closing-banner img{display:none}.footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:25px}.article-layout{grid-template-columns:1fr}.article-sidebar{display:none}.topic-header{padding-bottom:35px}.crumbs{margin-bottom:40px}}
@media(max-width:560px){body{font-size:15px}.shell{width:calc(100% - 36px)}.masthead-inner{min-height:68px}.brand{font-size:1.18rem}.brand-icon{height:38px;width:38px;border-radius:11px}.brand small{font-size:9px}.nav{grid-template-columns:1fr 1fr;padding-inline:18px}.hero{padding-block:43px 42px;gap:38px}.hero h1{font-size:clamp(2.6rem,11vw,3.8rem);margin-bottom:19px}.hero h1 span{font-size:.6em}.hero-lead{font-size:1.05rem}.hero-actions{margin-top:26px}.button{width:100%;text-align:center;padding-inline:15px}.hero-foot{gap:8px 14px;margin-top:29px;font-size:.69rem}.hero-visual{min-height:300px;border-radius:17px}.visual-caption{left:22px;bottom:25px}.visual-caption strong{font-size:1.5rem}.feature-strip>a{padding:17px 19px}.section-space{padding-block:69px}.section-contrast{padding-block:65px}.section-head h2,.split-head h2{font-size:2.05rem}.editorial-image{height:245px}.editorial-copy{padding:30px 25px}.editorial-copy h3{font-size:1.7rem}.resource-grid{grid-template-columns:1fr}.resource{min-height:250px;padding:27px}.split-photo{min-height:230px}.topic-links>a{grid-template-columns:1fr 23px;gap:6px 10px}.topic-links>a>span:first-child{grid-column:1/-1}.topic-links strong{font-size:1.03rem}.topic-links>a>span:last-child{grid-row:2;grid-column:2}.closing-banner{padding:31px 25px;margin-bottom:65px}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-grid>div:first-child{grid-column:1/-1}.footer-grid h2{font-size:.95rem}.copyright{display:block}.copyright span{display:block;margin:6px 0}.article-wrap,.faq-page{padding-top:14px;padding-bottom:70px}.crumbs{margin:18px 0 35px}.topic-header h1{font-size:2.55rem}.topic-header .lead{font-size:1rem}.article-banner img{height:220px;border-radius:13px}.prose h2{margin-top:43px;font-size:1.65rem}.prose p{font-size:.95rem}.comparison,.content-matrix{grid-template-columns:1fr}.comparison>div+div{border-left:0;border-top:1px solid var(--line)}.comparison>div{padding:19px}.check-item{grid-template-columns:40px 1fr}.notice{padding:20px}.article-next{padding:25px}.faq-intro{grid-template-columns:1fr;gap:12px}.faq-intro img{height:185px}.faq-intro h2{font-size:1.6rem}.faq-entry summary{font-size:1rem;padding:23px 38px 23px 0}.faq-entry summary::after{right:4px;top:17px}.faq-answer{padding-right:15px}.faq-buttons{display:grid}.faq-bottom h2{font-size:1.7rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition-duration:0s!important;animation-duration:0s!important}}