:root{--navy:#091426;--muted:#667085;--cyan:#18c7d4;--violet:#7a5cff;--line:#e8edf3;--paper:#f7f9fc}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--navy);font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;background:#fff}a{color:inherit;text-decoration:none}.shell{width:min(1180px,calc(100% - 48px));margin-inline:auto}.nav{height:84px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:-.4px}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;color:#fff;background:linear-gradient(145deg,#7357ff,#502fd7);font-size:14px;box-shadow:0 8px 20px #694ce336}.brand-accent{color:#7052ef}.nav-links{display:flex;gap:38px;font-size:14px;color:#536073}.nav-links a:hover{color:#6547e8}.nav-button,.primary-button,.light-button{display:inline-flex;align-items:center;gap:20px;border-radius:9px;font-weight:700;transition:.2s}.nav-button{padding:11px 18px;background:#f0edff;color:#6144df;font-size:13px}.nav-button:hover{transform:translateY(-2px)}
.hero{min-height:620px;display:grid;grid-template-columns:1fr 1fr;align-items:center;padding-top:46px;padding-bottom:80px}.hero-copy{padding-top:4px}.eyebrow{display:inline-flex;align-items:center;gap:9px;padding:8px 13px;border:1px solid #d8e3e8;border-radius:7px;background:#f5fbfc;color:#536b74;font-size:12px}.dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px #17c7d420}.hero h1{font-size:57px;line-height:1.2;letter-spacing:-3px;margin:24px 0 20px;font-weight:850}.hero h1 span{color:#6e50ec;position:relative}.hero h1 span:after{content:"";position:absolute;left:2px;right:0;bottom:-8px;height:7px;border-radius:50%;background:#26ccd1;transform:rotate(-1deg);opacity:.85}.hero-lead{color:#647083;font-size:16px;line-height:1.9}.hero-actions{display:flex;align-items:center;gap:30px;margin:31px 0 45px}.primary-button{padding:15px 22px;color:#fff;background:linear-gradient(135deg,#7559f2,#6042dd);font-size:14px;box-shadow:0 12px 24px #6448df2e}.primary-button:hover,.light-button:hover{transform:translateY(-3px)}.text-button{font-size:14px;font-weight:700}.play{display:inline-grid;place-items:center;width:26px;height:26px;border:1px solid #d7dde5;border-radius:50%;font-size:8px;color:#7455eb;margin-right:8px}.stats{display:flex;gap:44px}.stats div{display:flex;flex-direction:column}.stats strong{font-size:23px}.stats span{font-size:11px;color:#8a94a4;margin-top:5px}.code-scene{position:relative;height:490px;display:grid;place-items:center}.orbit{position:absolute;border-radius:50%;border:1px solid #e1e4fb}.orbit-one{width:470px;height:470px}.orbit-two{width:365px;height:365px;border-style:dashed}.code-scene:before{content:"";position:absolute;width:310px;height:310px;border-radius:50%;background:linear-gradient(145deg,#dafaff,#eee9ff);filter:blur(2px)}.code-card{position:relative;width:445px;background:#111c31;border:1px solid #2b3952;border-radius:14px;color:#d8deeb;box-shadow:0 32px 70px #18244538;overflow:hidden;transform:rotate(-1deg)}.code-head{height:47px;display:flex;align-items:center;border-bottom:1px solid #29364b;padding:0 15px;color:#9ba6b7;font:12px Consolas,monospace}.code-head span{margin:auto}.code-head b{font-size:14px}.lights{display:flex;gap:6px}.lights i{width:8px;height:8px;border-radius:50%;background:#ff6b76}.lights i:nth-child(2){background:#f7bd4b}.lights i:nth-child(3){background:#37c893}.code-card pre{margin:0;padding:22px 0 16px;font:12px/1.85 Consolas,monospace}.line{display:inline-block;width:40px;text-align:right;margin-right:18px;color:#536078;user-select:none}.line.active{background:#6850e3;color:#fff;border-radius:3px}.code-card em{color:#cb80e8;font-style:normal}.type{color:#52d4c4}.method{color:#75b7ff}.string{color:#f5c477}.terminal{height:48px;background:#0b1425;border-top:1px solid #273449;padding:14px 22px;font:12px Consolas,monospace;color:#b8c3d4}.terminal span{color:#50d0c7;margin-right:10px}.terminal i{display:inline-block;width:6px;height:13px;background:#6a55e7;margin-left:4px;vertical-align:middle}.float-tag{position:absolute;background:#fff;border:1px solid #e4e8ef;border-radius:10px;box-shadow:0 15px 35px #1424451c}.tag-one{right:-3px;top:84px;padding:12px 16px;display:flex;gap:10px;align-items:center}.tag-one>span{display:grid;place-items:center;width:27px;height:27px;border-radius:7px;background:#dcf8f1;color:#1ab68e}.tag-one div{display:flex;flex-direction:column}.tag-one b{font-size:11px}.tag-one small{font-size:9px;color:#98a1ad;margin-top:4px}.tag-two{left:8px;bottom:52px;padding:12px 16px;display:flex;flex-direction:column}.tag-two b{color:#714fe8;font-size:18px}.tag-two span{font-size:9px;color:#8b95a5;margin-top:3px}
.roadmap{padding:88px 0}.section-heading{display:flex;align-items:end;justify-content:space-between;margin-bottom:40px}.section-no{font:700 12px Consolas,monospace;color:#7254eb;letter-spacing:2px}.section-heading h2,.knowledge h2{font-size:30px;margin:9px 0 10px;letter-spacing:-1px}.section-heading p,.knowledge-copy p{color:#7d8796;font-size:14px}.section-heading>a{font-size:12px;color:#694be4;font-weight:700}.lesson-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.lesson{border:1px solid var(--line);border-radius:14px;padding:24px 22px;background:#fff;transition:.25s}.lesson:hover{transform:translateY(-7px);box-shadow:0 20px 40px #1b30500f;border-color:#d6d0fa}.lesson-top{display:flex;justify-content:space-between;align-items:center}.lesson-top>span{font:700 11px Consolas,monospace;color:#a2aab6}.lesson-top small{padding:5px 9px;border-radius:5px;background:#e6fbfc;color:#13a7b1}.lesson.violet small{background:#eeeaff;color:#6c51e3}.lesson.orange small{background:#fff2e6;color:#dd7a23}.lesson.green small{background:#e7f8f1;color:#2a9f79}.lesson-icon{width:42px;height:42px;display:grid;place-items:center;margin:31px 0 22px;border-radius:10px;background:#e9fbfc;color:#10aebb;font:700 14px Consolas}.violet .lesson-icon{background:#efecff;color:#6b50e5}.orange .lesson-icon{background:#fff2e7;color:#e67d25}.green .lesson-icon{background:#e9f8f2;color:#249876}.lesson h3{font-size:18px;margin:0 0 10px}.lesson p{height:36px;color:#828c9c;font-size:12px;line-height:1.6}.lesson>a{display:flex;justify-content:space-between;margin-top:24px;padding-top:18px;border-top:1px solid #edf0f4;font-size:11px;font-weight:700}.knowledge{margin-top:30px;margin-bottom:100px;border-radius:22px;background:linear-gradient(120deg,#f2f0ff,#effbfd);min-height:370px;padding:64px 70px;display:grid;grid-template-columns:1fr 1fr;align-items:center;overflow:hidden}.knowledge-copy{max-width:400px}.knowledge-copy p{line-height:1.9;margin-bottom:28px}.topic-cloud{height:260px;position:relative}.topic{position:absolute;padding:13px 18px;background:#fff;border:1px solid #e4e7f0;border-radius:9px;box-shadow:0 12px 28px #34415f12;font-size:12px;font-weight:700}.topic span{color:#7655ed;margin-right:9px}.topic-1{top:5px;left:25px}.topic-2{top:22px;right:12px}.topic-3{top:104px;left:95px}.topic-4{top:153px;right:4px}.topic-5{bottom:7px;left:5px}.topic-6{bottom:0;left:195px}.cta{min-height:210px;border-radius:18px;background:linear-gradient(135deg,#694be4,#765be8 55%,#5340cd);color:#fff;padding:43px 54px;display:flex;align-items:center;justify-content:space-between;box-shadow:0 24px 50px #5843c92d}.cta small{color:#d9d2ff}.cta h2{font-size:28px;margin:9px 0}.cta p{color:#ddd7fa;font-size:13px}.light-button{background:#fff;color:#5e43d9;padding:15px 24px;font-size:13px}footer{margin-top:90px;border-top:1px solid #edf0f4;padding:35px 0}.footer-inner{display:flex;align-items:center;gap:32px}.footer-inner p{font-size:12px;color:#8b95a4}.footer-links{display:flex;gap:24px;margin-left:auto;font-size:11px;color:#748092}.icp{font-size:11px;color:#8b95a4;border-left:1px solid #e2e6eb;padding-left:24px}.icp:hover{color:#6547e8}
@media(max-width:900px){.nav-links{display:none}.hero{grid-template-columns:1fr;padding-top:55px}.hero-copy{text-align:center}.stats{justify-content:center}.code-scene{margin-top:40px}.lesson-grid{grid-template-columns:repeat(2,1fr)}.knowledge{grid-template-columns:1fr;padding:48px}.topic-cloud{margin-top:30px}.footer-inner{flex-wrap:wrap}.footer-links{margin-left:0}.icp{margin-left:auto}}@media(max-width:600px){.shell{width:min(100% - 28px,1180px)}.nav-button{display:none}.hero h1{font-size:39px;letter-spacing:-2px}.hero-lead br{display:none}.stats{gap:25px}.code-scene{height:390px;transform:scale(.76);margin-inline:-60px}.lesson-grid{grid-template-columns:1fr}.knowledge{padding:38px 24px}.topic-cloud{height:auto;display:grid;grid-template-columns:1fr 1fr;gap:10px}.topic{position:static;padding:12px}.cta{padding:35px 25px;flex-direction:column;align-items:flex-start;gap:20px}.cta h2{font-size:23px}.footer-inner{flex-direction:column;align-items:flex-start}.footer-links{flex-wrap:wrap}.icp{margin-left:0;border:0;padding-left:0}}

/* 纯展示模式：页面不包含按钮、链接或悬停交互 */
.nav-button{cursor:default}.lesson:hover{transform:none;box-shadow:none;border-color:var(--line)}.lesson p{margin-bottom:0}.cta-mark{display:grid;place-items:center;width:82px;height:82px;border:1px solid #ffffff4d;border-radius:22px;background:#ffffff14;color:#fff;font-size:24px;font-weight:850;box-shadow:inset 0 1px 0 #ffffff36}.footer-links span{white-space:nowrap}