:root { font-family: "Segoe UI", "Microsoft YaHei", sans-serif; color: #10213a; background: #f2f5f9; font-synthesis: none; }
* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; min-height: 100vh; background: #f2f5f9; }
button, a { font: inherit; }
.shell { width: min(1040px, calc(100% - 32px)); margin: 0 auto; padding-bottom: 18px; }
.topbar { height: 58px; display: flex; align-items: center; border-bottom: 1px solid #dae2ec; }
.brand { display: flex; align-items: center; gap: 9px; }
.brand img { width: 34px; height: 34px; border-radius: 8px; }
.brand strong { font-size: 15px; }
.brand span { padding: 3px 6px; border-radius: 4px; color: #0a58d8; background: #e7effd; font-size: 9px; font-weight: 700; }
.intro { min-height: 112px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.intro p { margin: 0; color: #0a58d8; font-size: 10px; font-weight: 800; }
.intro h1 { margin: 5px 0 4px; font-size: 28px; line-height: 1.15; letter-spacing: 0; }
.intro span { color: #718096; font-size: 12px; }
.intro b { color: #0a58d8; font-size: 22px; }
.step { display: grid; grid-template-columns: 54px 1fr; gap: 15px; padding: 17px 0; border-top: 1px solid #dce4ed; }
.step.current .step-number { background: #07c160; }
.step-number { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 8px; color: white; background: #0a58d8; font-size: 12px; font-weight: 800; }
.step-content { min-width: 0; }
.step-title { min-height: 44px; display: flex; align-items: start; justify-content: space-between; gap: 16px; }
.step h2 { margin: 0 0 3px; font-size: 17px; letter-spacing: 0; }
.step p { margin: 0 0 11px; color: #728197; font-size: 11px; }
.button { min-height: 34px; padding: 0 13px; display: inline-flex; align-items: center; justify-content: center; border-radius: 6px; border: 0; text-decoration: none; font-size: 11px; font-weight: 700; cursor: pointer; white-space: nowrap; }
.primary { color: white; background: #0a58d8; }
.secondary { color: #0a58d8; border: 1px solid #b9cef0; background: white; }
.downloads { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; }
.download-item { min-width: 0; padding: 10px; display: grid; grid-template-columns: 38px minmax(0, 1fr) auto; align-items: center; gap: 9px; border: 1px solid #dfe7f0; border-radius: 7px; background: white; }
.app-icon { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 7px; color: #0a58d8; background: #e9f1fd; font-size: 10px; font-weight: 800; }
.app-icon.cc { color: #078a47; background: #e5f8ed; }
.download-item strong, .download-item small { display: block; }
.download-item strong { font-size: 11px; }
.download-item small { margin-top: 2px; color: #8390a1; font-size: 9px; }
.instructions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.instruction { min-width: 0; min-height: 58px; padding: 9px; display: grid; grid-template-columns: 30px minmax(0, 1fr) auto; align-items: center; gap: 8px; border: 1px solid #e1e8f0; border-radius: 7px; color: inherit; background: white; text-align: left; }
.instruction b { width: 30px; height: 30px; display: grid; place-items: center; border-radius: 6px; color: #0a58d8; background: #eaf1fd; font-size: 9px; }
.instruction strong, .instruction small { display: block; }
.instruction strong { font-size: 10px; }
.instruction small { margin-top: 2px; color: #7d8b9d; font-size: 9px; }
.instruction em { color: #0a58d8; font-size: 9px; font-style: normal; font-weight: 700; }
.preview-trigger { cursor: zoom-in; }
footer { padding-top: 12px; border-top: 1px solid #dce4ed; color: #8a96a5; text-align: center; font-size: 10px; }
.preview { position: fixed; inset: 0; z-index: 20; display: none; place-items: center; padding: 28px; background: rgba(7, 15, 28, .88); }
.preview.open { display: grid; }
.preview figure { margin: 0; max-width: 96vw; }
.preview img { display: block; max-width: 96vw; max-height: 86vh; object-fit: contain; box-shadow: 0 18px 50px rgba(0,0,0,.35); }
.preview figcaption { margin-top: 8px; color: white; text-align: center; font-size: 11px; }
.preview-close { position: fixed; top: 16px; right: 16px; width: 38px; height: 38px; border: 0; border-radius: 6px; color: #17202a; background: white; font-size: 24px; line-height: 1; cursor: pointer; }
@media (max-width: 800px) { .downloads, .instructions { grid-template-columns: 1fr; } }
@media (max-width: 600px) { .shell { width: calc(100% - 20px); } .intro { min-height: 104px; } .intro h1 { font-size: 23px; } .intro b { display: none; } .step { grid-template-columns: 40px 1fr; gap: 10px; } .step-number { width: 36px; height: 36px; } .step-title { flex-direction: column; } .step-title .button { width: 100%; } .download-item { grid-template-columns: 38px minmax(0, 1fr); } .download-item .button { grid-column: 1 / -1; } }