.footer-whole-page[data-v-4860309f]{color:#fff;font-family:test;width:100vw;height:20vw;display:flex;flex-direction:column;align-content:center;justify-content:flex-start;background-color:#2d3030}.footer-main[data-v-4860309f]{height:16vw;width:100%;border-bottom:1px solid #a0a0a0;display:flex;flex-direction:row;flex-wrap:nowrap;justify-content:flex-start;align-items:flex-end}.main-1[data-v-4860309f]{height:90%;width:15vw;margin-left:10vw;margin-right:15vw;display:flex;flex-direction:column;align-items:flex-start}.footer-icon[data-v-4860309f]{height:3.5vw;width:7vw;background-image:url(http://data.xiyilab.com/web/main/static/%E9%A6%96%E9%A1%B5/%E8%B5%84%E6%BA%90%204.png);background-size:contain;background-repeat:no-repeat;background-position:50%}.main-title[data-v-4860309f]{font-size:1.1vw;font-family:test;font-weight:800;color:#fff;line-height:3vw;height:3vw;white-space:nowrap}.main-content[data-v-4860309f]{position:relative;margin-top:1vw;width:15vw;font-size:.95vw;font-family:test;font-weight:400;color:#a0a0a0;line-height:1.5vw;display:flex;flex-direction:column;justify-content:flex-start}.main-2[data-v-4860309f]{height:60%;width:10vw;margin-right:10vw;margin-bottom:2vw}.footer-footer[data-v-4860309f]{font-size:.8vw;line-height:4vw;height:4vw;width:100%;text-align:center}.main-3[data-v-4860309f]{width:10vw;height:10vw;display:flex;margin-bottom:2vw;margin-left:5vw;margin-right:10vw;flex-direction:column}.qr-code[data-v-4860309f]{margin-left:1.5vw;background:url(http://data.xiyilab.com/web/main/static/%E9%A6%96%E9%A1%B5/%E4%BA%8C%E7%BB%B4%E7%A0%81.png) no-repeat 50%;background-size:contain;width:7vw;height:7vw}.qr-text[data-v-4860309f]{line-height:2.5vw;height:2vw;text-align:center;font-size:1vw;color:#a0a0a0}.main-line[data-v-4860309f]{height:80%;width:1px;background-color:#a0a0a0;margin-bottom:1.6vw}.app-download-page[data-v-0b2affac]{width:100vw;overflow-x:hidden;background-color:#f9faff}.nav-header[data-v-0b2affac]{width:100vw;height:4vw}.download-hero[data-v-0b2affac]{width:100vw;height:48vw;background:linear-gradient(135deg,#1a1a2e,#16213e 40%,#0f3460);position:relative;overflow:hidden}.hero-content[data-v-0b2affac]{width:80vw;margin:0 auto;display:flex;flex-direction:row;justify-content:space-between;align-items:center;height:100%;position:relative;z-index:2}.hero-left[data-v-0b2affac]{width:45vw;display:flex;flex-direction:column;justify-content:center}.hero-title[data-v-0b2affac]{font-family:test;font-size:3.5vw;font-weight:800;color:#fff;letter-spacing:3px;margin-bottom:2vw}.hero-card[data-v-0b2affac]{background:hsla(0,0%,100%,.08);border:1px solid hsla(0,0%,100%,.15);border-radius:1.2vw;padding:2.5vw 3vw;backdrop-filter:blur(10px)}.hero-desc[data-v-0b2affac]{font-family:test;font-size:1vw;color:hsla(0,0%,100%,.75);letter-spacing:.5px;line-height:2vw;margin-bottom:2vw}.hero-buttons[data-v-0b2affac]{display:flex;flex-direction:row;gap:1.5vw;margin-bottom:1.5vw}.hero-btn[data-v-0b2affac]{display:flex;flex-direction:row;align-items:center;padding:.8vw 1.8vw;border-radius:.8vw;cursor:pointer;transition:all .3s ease;min-width:14vw}.hero-btn[data-v-0b2affac]:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(0,0,0,.3)}.hero-btn-android[data-v-0b2affac]{background-color:#3ddc84;color:#fff}.hero-btn-android[data-v-0b2affac]:hover{background-color:#2ec974}.hero-btn-ios[data-v-0b2affac]{background-color:#007aff;color:#fff}.hero-btn-ios[data-v-0b2affac]:hover{background-color:#006ae0}.hero-btn-icon[data-v-0b2affac]{width:2.2vw;height:2.2vw;margin-right:1vw;background-repeat:no-repeat;background-size:contain;background-position:50%;flex-shrink:0}.android-icon-sm[data-v-0b2affac]{background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23fff'%3E%3Cpath d='M17.523 2.273l1.732-2.998a.5.5 0 00-.866-.5l-1.75 3.03A10.426 10.426 0 0012 .977a10.43 10.43 0 00-4.64 1.828L5.61-.227a.5.5 0 00-.866.5l1.732 3C3.374 5.477 1.5 8.416 1.5 11.77h23c0-3.354-1.874-6.293-4.977-9.497zM7.5 8.77a1 1 0 110-2 1 1 0 010 2zm9 0a1 1 0 110-2 1 1 0 010 2zm-15 4c0-.55.45-1 1-1h22c.55 0 1 .45 1 1v9c0 .55-.45 1-1 1h-22c-.55 0-1-.45-1-1v-9z'/%3E%3C/svg%3E")}.ios-icon-sm[data-v-0b2affac]{background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23fff'%3E%3Cpath d='M18.71 19.5c-.83 1.24-1.71 2.45-3.05 2.47-1.34.03-1.77-.79-3.29-.79-1.53 0-2 .77-3.27.82-1.31.05-2.3-1.32-3.14-2.53C4.25 17 2.94 12.45 4.7 9.39c.87-1.52 2.43-2.48 4.12-2.51 1.28-.02 2.5.87 3.29.87.78 0 2.26-1.07 3.8-.91.65.03 2.47.26 3.64 1.98-.09.06-2.17 1.28-2.15 3.81.03 3.02 2.65 4.03 2.68 4.04-.03.07-.42 1.44-1.38 2.83M13 3.5c.73-.83 1.94-1.46 2.94-1.5.13 1.17-.34 2.35-1.04 3.19-.69.85-1.83 1.51-2.93 1.42-.15-1.15.41-2.35 1.03-3.11z'/%3E%3C/svg%3E")}.hero-btn-text[data-v-0b2affac]{display:flex;flex-direction:column;justify-content:center}.hero-btn-label[data-v-0b2affac]{font-family:test;font-size:1.1vw;font-weight:700;letter-spacing:1px;line-height:1.4}.hero-btn-sub[data-v-0b2affac]{font-family:test;font-size:.7vw;opacity:.85;letter-spacing:.5px;line-height:1.4}.hero-agreement[data-v-0b2affac]{font-family:test;font-size:.7vw;color:hsla(0,0%,100%,.4);letter-spacing:.5px;line-height:1.5}.hero-agreement a[data-v-0b2affac]{color:hsla(0,0%,100%,.6);text-decoration:underline;transition:color .2s}.hero-agreement a[data-v-0b2affac]:hover{color:hsla(0,0%,100%,.9)}.hero-phone[data-v-0b2affac]{width:38vw;height:35vw;margin-top:4vw;background-image:url(http://data.xiyilab.com/web/main/static/%E8%B5%84%E6%BA%90%E4%B8%8B%E8%BD%BD/iPhones.png);background-repeat:no-repeat;background-size:contain;background-position:50%}.about-section[data-v-0b2affac]{width:80vw;margin:0 auto;padding:5vw 0 2vw}.section-title[data-v-0b2affac]{font-family:test;font-size:2vw;font-weight:700;color:#3e3a39;text-align:center;margin-bottom:.5vw}.section-subtitle[data-v-0b2affac]{font-family:test;font-size:.9vw;color:#999;text-align:center;margin-bottom:3vw;letter-spacing:1px}.about-content[data-v-0b2affac]{background:#fff;border-radius:1vw;padding:3vw 4vw;box-shadow:0 2px 12px rgba(0,0,0,.06)}.about-text p[data-v-0b2affac]{font-family:test;font-size:1vw;color:#555;line-height:2.2vw;margin-bottom:1.5vw;letter-spacing:.5px}.about-text p[data-v-0b2affac]:last-child{margin-bottom:0}.about-text strong[data-v-0b2affac]{color:#3e3a39}.features-section[data-v-0b2affac]{width:80vw;margin:0 auto;padding:4vw 0 2vw}.features-grid[data-v-0b2affac]{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5vw;margin-top:2vw}.feature-card[data-v-0b2affac]{background:#fff;border-radius:1vw;padding:2vw 1.5vw;text-align:center;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s ease}.feature-card[data-v-0b2affac]:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(0,0,0,.1)}.feature-card-icon[data-v-0b2affac]{width:3.5vw;height:3.5vw;margin:0 auto 1vw;border-radius:.8vw;background-repeat:no-repeat;background-size:50%;background-position:50%}.icon-textbook[data-v-0b2affac]{background-color:#e8f4fd;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%232196F3'%3E%3Cpath d='M21 5c-1.11-.35-2.33-.5-3.5-.5-1.95 0-4.05.4-5.5 1.5-1.45-1.1-3.55-1.5-5.5-1.5S2.45 4.9 1 6v14.65c0 .25.25.5.5.5.1 0 .15-.05.25-.05C3.1 20.45 5.05 20 6.5 20c1.95 0 4.05.4 5.5 1.5 1.35-.85 3.8-1.5 5.5-1.5 1.65 0 3.35.3 4.75 1.05.1.05.15.05.25.05.25 0 .5-.25.5-.5V6c-.6-.45-1.25-.75-2-1zm0 13.5c-1.1-.35-2.3-.5-3.5-.5-1.7 0-4.15.65-5.5 1.5V8c1.35-.85 3.8-1.5 5.5-1.5 1.2 0 2.4.15 3.5.5v11.5z'/%3E%3C/svg%3E")}.icon-challenge[data-v-0b2affac]{background-color:#fff3e0;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23FF9800'%3E%3Cpath d='M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm-2 15l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z'/%3E%3C/svg%3E")}.icon-simulate[data-v-0b2affac]{background-color:#e8f5e9;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%234CAF50'%3E%3Cpath d='M7 2v11h3v9l7-12h-4l4-8z'/%3E%3C/svg%3E")}.icon-exam[data-v-0b2affac]{background-color:#fce4ec;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23E91E63'%3E%3Cpath d='M14 2H6c-1.1 0-2 .9-2 2v16c0 1.1.9 2 2 2h12c1.1 0 2-.9 2-2V8l-6-6zm2 16H8v-2h8v2zm0-4H8v-2h8v2zm-3-5V3.5L18.5 9H13z'/%3E%3C/svg%3E")}.icon-island[data-v-0b2affac]{background-color:#e0f7fa;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%2300BCD4'%3E%3Cpath d='M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10 10-4.48 10-10S17.52 2 12 2zm0 18c-4.41 0-8-3.59-8-8s3.59-8 8-8 8 3.59 8 8-3.59 8-8 8zm-5.5-2.5l7.51-3.49L17.5 6.5 9.99 9.99 6.5 17.5zM12 11c.55 0 1 .45 1 1s-.45 1-1 1-1-.45-1-1 .45-1 1-1z'/%3E%3C/svg%3E")}.icon-ai[data-v-0b2affac]{background-color:#ede7f6;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23673AB7'%3E%3Cpath d='M20 2H4c-1.1 0-2 .9-2 2v12c0 1.1.9 2 2 2h14l4 4V4c0-1.1-.9-2-2-2zm-8 11H7v-2h5v2zm5-4H7V7h10v2z'/%3E%3C/svg%3E")}.feature-card-title[data-v-0b2affac]{font-family:test;font-size:1.1vw;font-weight:700;color:#3e3a39;margin-bottom:.5vw}.feature-card-desc[data-v-0b2affac]{font-family:test;font-size:.8vw;color:#888;letter-spacing:.5px}.subjects-section[data-v-0b2affac]{width:80vw;margin:0 auto;padding:4vw 0 2vw}.subjects-grid[data-v-0b2affac]{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5vw;margin-top:2vw}.subject-card[data-v-0b2affac]{background:#fff;border-radius:1vw;padding:2.5vw 1vw;text-align:center;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s ease;position:relative;overflow:hidden}.subject-card[data-v-0b2affac]:hover{transform:translateY(-3px);box-shadow:0 6px 20px rgba(0,0,0,.1)}.subject-card[data-v-0b2affac]:before{content:"";position:absolute;top:0;left:0;right:0;height:.3vw}.subject-physics[data-v-0b2affac]:before{background:linear-gradient(90deg,#5eb2f7,#3a8fd8)}.subject-chemistry[data-v-0b2affac]:before{background:linear-gradient(90deg,#a4a047,#8b8735)}.subject-biology[data-v-0b2affac]:before{background:linear-gradient(90deg,#76d187,#56b868)}.subject-science[data-v-0b2affac]:before{background:linear-gradient(90deg,#ff9f43,#ee8a2e)}.subject-icon[data-v-0b2affac]{width:4vw;height:4vw;margin:0 auto 1vw;background-repeat:no-repeat;background-size:contain;background-position:50%}.subject-physics .subject-icon[data-v-0b2affac]{background-image:url(http://data.xiyilab.com/web/main/static/%E9%A6%96%E9%A1%B5/%E7%89%A9%E7%90%86%E5%AE%9E%E9%AA%8C1.png)}.subject-chemistry .subject-icon[data-v-0b2affac]{background-image:url(http://data.xiyilab.com/web/main/static/%E9%A6%96%E9%A1%B5/%E5%8C%96%E5%AD%A6%E5%AE%9E%E9%AA%8C1.png)}.subject-biology .subject-icon[data-v-0b2affac]{background-image:url(http://data.xiyilab.com/web/main/static/%E9%A6%96%E9%A1%B5/%E7%94%9F%E7%89%A9%E5%AE%9E%E9%AA%8C1.png)}.subject-science .subject-icon[data-v-0b2affac]{background-color:#fff3e0;border-radius:50%;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23FF9800'%3E%3Cpath d='M12 3L1 9l4 2.18v6L12 21l7-3.82v-6l2-1.09V17h2V9L12 3zm6.82 6L12 12.72 5.18 9 12 5.28 18.82 9zM17 15.99l-5 2.73-5-2.73v-3.72L12 15l5-2.73v3.72z'/%3E%3C/svg%3E");background-size:50%}.subject-name[data-v-0b2affac]{font-family:test;font-size:1.1vw;font-weight:700;color:#3e3a39;margin-bottom:.4vw}.subject-desc[data-v-0b2affac]{font-family:test;font-size:.8vw;color:#999}.vip-section[data-v-0b2affac]{width:80vw;margin:0 auto;padding:4vw 0 2vw}.vip-grid[data-v-0b2affac]{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5vw;margin-top:2vw}.vip-item[data-v-0b2affac]{background:#fff;border-radius:.6vw;padding:1.2vw 1.5vw;display:flex;flex-direction:row;align-items:center;box-shadow:0 2px 8px rgba(0,0,0,.04);transition:all .3s ease}.vip-item[data-v-0b2affac]:hover{box-shadow:0 4px 16px rgba(0,0,0,.08)}.vip-check[data-v-0b2affac]{width:1.4vw;height:1.4vw;margin-right:1vw;flex-shrink:0;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%233ddc84'%3E%3Cpath d='M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-size:contain;background-position:50%}.vip-item span[data-v-0b2affac]{font-family:test;font-size:.95vw;color:#555}