:root{color-scheme:light;--ink:#173c58;--muted:#637780;--line:#d9e3e5;--blue:#173f6b;--green:#18665b;--paper:#f4f7f6}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font:16px/1.75 'Microsoft YaHei','PingFang SC',Arial,sans-serif}a{color:inherit}a:focus-visible{outline:3px solid #bc821a;outline-offset:5px}header{background:#fff;border-bottom:1px solid var(--line)}.bar{max-width:1120px;margin:auto;min-height:86px;padding:18px 32px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:13px;text-decoration:none}.mark{width:42px;height:42px;border-radius:13px;background:var(--blue);color:#fff;display:grid;place-items:center;font:28px Georgia,serif}.brand strong{display:block;font-size:20px;letter-spacing:2px;line-height:1.4}.brand small{display:block;font-size:11px;letter-spacing:1.2px;color:var(--muted)}nav{display:flex;gap:30px;font-size:14px}nav a{text-decoration:none}nav a:hover{text-decoration:underline;text-underline-offset:5px}main{max-width:1120px;margin:auto;padding:62px 32px 52px}.intro{max-width:810px;margin-bottom:35px}.eyebrow{color:var(--green);font-size:11px;letter-spacing:3px;font-weight:700;margin:0 0 15px}h1{font-size:clamp(30px,3.6vw,43px);line-height:1.55;letter-spacing:.5px;margin:0 0 15px;font-weight:700}.lead{color:var(--muted);margin:0;font-size:16px}.platforms{display:grid;grid-template-columns:1fr 1fr;gap:26px}.platform{background:#fff;border:1px solid var(--line);border-radius:17px;overflow:hidden}.platform-top{height:5px;background:var(--blue)}.map .platform-top{background:var(--green)}.inside{padding:31px 32px 28px}.platform-tag{display:flex;justify-content:space-between;align-items:center;color:var(--blue);font-size:12px;letter-spacing:1.5px}.map .platform-tag{color:var(--green)}.number{color:#83979f;font:16px Georgia,serif}h2{font-size:25px;line-height:1.4;margin:20px 0 9px}.platform p{color:var(--muted);font-size:14px;margin:0 0 25px;min-height:49px}.entry{display:flex;align-items:center;justify-content:space-between;background:var(--blue);color:white;text-decoration:none;padding:13px 18px;border-radius:8px;font-size:15px;font-weight:700}.map .entry{background:var(--green)}.entry:hover{filter:brightness(1.09)}.teacher{margin-top:18px;display:flex;justify-content:space-between;gap:15px;align-items:center;font-size:12px;color:var(--muted)}.teacher a{text-underline-offset:4px}.hint{margin:25px 0 0;color:var(--muted);font-size:13px;display:flex;align-items:baseline;gap:10px}.hint:before{content:'';width:7px;height:7px;background:#8daa8e;border-radius:50%;flex:none}.divider{height:1px;background:var(--line);margin:43px 0 24px}.help{display:flex;justify-content:space-between;gap:28px;align-items:flex-start}.help p{margin:0;font-size:13px;color:var(--muted)}.help strong{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:3px}.help a{font-size:13px;color:var(--green);text-underline-offset:4px}footer{max-width:1120px;margin:auto;padding:0 32px 27px;color:var(--muted);font-size:12px}.footer-bar{border-top:1px solid var(--line);padding-top:18px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 25px}.footer-links{display:flex;gap:18px;flex-wrap:wrap}footer a{text-decoration:none}footer a:hover{text-decoration:underline}.legal{max-width:830px;background:#fff;border:1px solid var(--line);border-radius:16px;margin:0 auto;padding:36px}.legal h1{font-size:29px}.legal h2{font-size:18px;margin-top:25px}.legal p{margin:0 0 16px}.legal a{color:var(--green);text-underline-offset:4px}.back{display:inline-block;margin-bottom:20px;font-size:14px}.legal .updated{font-size:12px;color:var(--muted)}
@media(max-width:660px){.bar{min-height:75px;padding:15px 20px;gap:14px}.brand strong{font-size:17px}.brand small{font-size:10px}.mark{width:36px;height:36px;font-size:25px;border-radius:10px}nav{gap:14px;font-size:12px}nav a:first-child{display:none}main{padding:38px 20px 34px}.intro{margin-bottom:26px}.platforms{grid-template-columns:1fr;gap:20px}.inside{padding:24px}.platform p{min-height:0}.eyebrow{font-size:10px;letter-spacing:2px}h1{font-size:30px}.lead{font-size:14px}h2{font-size:23px}.help{display:block}.help>a{display:inline-block;margin-top:12px}.divider{margin:30px 0 20px}footer{padding:0 20px 24px}.legal{padding:24px}.legal h1{font-size:25px}.footer-bar{display:block}.footer-links{margin-top:10px;gap:12px}.hint{font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}