:root{color-scheme:dark;--bg:#0b0d0f;--surface:#1d1d1d;--line:rgba(224,210,190,.19);--text:#f6f3ed;--muted:#c1b8a9;--accent:#e5d3b6}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}:focus-visible{outline:2px solid var(--accent);outline-offset:4px}.skip-link{position:absolute;top:-80px;left:20px;z-index:100;background:#d9e7ff;color:#10192b;padding:12px 18px}.skip-link:focus{top:14px}
.topic-container{width:min(1220px,calc(100% - 96px));margin:auto}.topic-header{height:80px;display:flex;align-items:center;gap:22px;padding:0 clamp(24px,5vw,76px);border-bottom:1px solid var(--line);background:rgba(7,11,20,.93)}.topic-brand{display:block;width:62px;height:62px;background:#fff;border-radius:8px;overflow:hidden;flex:0 0 auto}.topic-brand img{display:block;width:62px;height:62px;object-fit:contain}.topic-header>span{font-size:12px;letter-spacing:.12em;color:#d7e4f7}.topic-header nav{display:flex;gap:30px;margin-left:auto;font-size:13px}.topic-header nav a:hover,.topic-footer a:hover{color:var(--accent)}
.topic-hero{min-height:660px;display:flex;align-items:center;background:linear-gradient(90deg,rgba(5,8,15,.75),rgba(5,8,15,.07)),url('assets/atmosphere.svg') center/cover;position:relative;isolation:isolate;overflow:hidden}.topic-hero:after{content:"";position:absolute;inset:0;z-index:-1;background-position:center;background-size:cover;opacity:.45}.topic-canvas .topic-hero:after{background-image:url('assets/bg-canvas.svg')}.topic-editor .topic-hero:after{background-image:url('assets/bg-editor.svg')}.topic-story .topic-hero:after{background-image:url('assets/bg-story.svg')}.topic-hero .topic-container{padding:96px 0}.eyebrow{margin:0 0 25px;color:var(--accent);font-size:11px;font-weight:700;letter-spacing:.2em}.topic-hero h1{max-width:950px;margin:0;font-size:clamp(50px,6vw,92px);line-height:1.16;letter-spacing:-.065em}.topic-intro{max-width:690px;color:#d0dbee;font-size:18px;line-height:1.9;margin:28px 0 0}.topic-actions{display:flex;gap:13px;flex-wrap:wrap;margin-top:38px}.primary,.ghost{display:inline-flex;align-items:center;justify-content:space-between;gap:40px;min-width:188px;padding:16px 20px;font-size:13px;font-weight:700;transition:transform .3s cubic-bezier(.2,.8,.2,1),background .3s}.primary{background:#b4cefc;color:#0d1729}.ghost{border:1px solid rgba(209,225,252,.45)}.primary:hover,.ghost:hover{transform:translateY(-3px)}.primary:hover{background:#d8e5ff}.ghost:hover{background:rgba(110,160,237,.1)}
.topic-section{padding:120px 0;background:#0b1220}.topic-section:nth-of-type(odd){background:#0d1729}.section-top{display:grid;grid-template-columns:220px 1fr;gap:35px;align-items:start;margin-bottom:54px}.section-top>span{font-size:11px;letter-spacing:.17em;color:#9fbae0;padding-top:12px}.section-top h2{font-size:clamp(36px,4.4vw,62px);letter-spacing:-.055em;font-weight:600;line-height:1.2;margin:0;max-width:830px}.point-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.point-grid article{min-height:228px;background:linear-gradient(140deg,#16243d,#111c30);border:1px solid var(--line);padding:31px 33px}.point-grid article span,.step-grid article span{font-size:11px;color:#9abef4}.point-grid h3,.step-grid h3{margin:40px 0 13px;font-size:23px;letter-spacing:-.035em;font-weight:600}.point-grid p,.step-grid p{margin:0;color:var(--muted);font-size:14px;line-height:1.85;max-width:530px}.step-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}.step-grid article{min-height:230px;padding:28px 27px 10px 0}.step-grid article+article{border-left:1px solid var(--line);padding-left:28px}.step-grid h3{margin-top:55px}.faq-list{max-width:900px;margin-left:auto;border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line);padding:25px 0}.faq-list summary{cursor:pointer;list-style:none;font-size:19px;font-weight:600;display:flex;justify-content:space-between;gap:30px}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";color:var(--accent);font-size:23px;font-weight:400}.faq-list details[open] summary:after{content:"−"}.faq-list p{color:var(--muted);font-size:14px;line-height:1.9;max-width:750px;margin:18px 0 0}.related-section{padding:100px 0 115px;background:#0a101d url('assets/atmosphere.svg') center/cover}.related-links{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.related-links a{display:flex;justify-content:space-between;align-items:center;gap:20px;min-height:116px;padding:25px;border:1px solid var(--line);background:rgba(20,33,55,.78);font-size:18px;font-weight:600}.related-links a:hover{border-color:#9dc1f5;background:#1b2c4b}.related-links span{color:var(--accent)}.topic-footer{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:30px clamp(24px,5vw,76px);background:#080d18;color:#a6b7d1;font-size:12px}
@media(max-width:750px){.topic-container{width:calc(100% - 42px)}.topic-header{height:70px;padding:0 21px}.topic-brand,.topic-brand img{width:56px;height:56px}.topic-header>span{font-size:10px}.topic-header nav{gap:14px;font-size:11px}.topic-hero{min-height:600px}.topic-hero .topic-container{padding:80px 0}.topic-hero h1{font-size:clamp(43px,11vw,65px)}.topic-intro{font-size:15px}.topic-section{padding:80px 0}.section-top{display:block;margin-bottom:32px}.section-top h2{font-size:clamp(34px,8vw,48px);margin-top:20px}.point-grid,.step-grid,.related-links{grid-template-columns:1fr}.point-grid article{min-height:0;padding:25px}.point-grid h3{margin-top:26px}.step-grid article,.step-grid article+article{min-height:0;padding:23px 0 30px;border-left:0;border-bottom:1px solid var(--line)}.step-grid h3{margin-top:20px}.faq-list summary{font-size:16px}.related-section{padding:75px 0}.related-links a{min-height:82px;font-size:15px}.topic-footer{flex-wrap:wrap}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}