.download-center [hidden] { display: none !important; }
.download-center { --container: 1160px; }
.download-center .site-header { background: rgba(10,13,15,.96); }
.download-center .nav-shell { gap: 24px; }
.center-nav { display: flex; gap: 30px; margin-left: auto; font-size: 13px; color: #c0c2bd; }
.center-nav a:hover, .center-guide-link:hover { color: var(--copper-light); }
.download-hero { padding: 162px 0 70px; background: var(--ink); color: var(--white); }
.hero-center-grid { display: grid; grid-template-columns: 1.15fr 1fr; gap: 70px; align-items: center; }
.center-eyebrow { font-size: 11px; letter-spacing: .15em; font-weight: 600; display: flex; gap: 10px; align-items: center; margin: 0 0 26px; color: var(--muted); }
.center-intro .center-eyebrow { color: var(--copper-light); }
.center-eyebrow > span:first-child:empty { height: 1px; width: 27px; background: currentColor; }
.center-intro h1 { font-size: clamp(38px, 4.1vw, 59px); line-height: 1.12; letter-spacing: -.045em; margin: 0 0 26px; }
.center-intro h1 em { font-style: normal; color: var(--copper-light); }
html[lang="zh-CN"] .center-intro h1 { line-height: 1.3; letter-spacing: -.025em; }
.center-lead { max-width: 490px; font-size: 16px; line-height: 1.8; color: #a8afac; margin: 0 0 28px; }
.center-guide-link { display: inline-flex; gap: 18px; font-size: 13px; border-bottom: 1px solid #4a4d48; padding: 0 0 9px; }
.center-assurances { display: flex; flex-wrap: wrap; column-gap: 20px; row-gap: 10px; color: #939c97; font-size: 11px; margin-top: 38px; }
.center-assurances span::before { content: "✓"; padding-right: 6px; color: var(--copper-light); }
.release-card { min-width: 0; background: #1a2022; border: 1px solid #333b3c; border-radius: 26px; padding: 32px; box-shadow: 0 24px 70px #0003; }
.release-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.release-badge { font-size: 9px; letter-spacing: .11em; color: #e7bd8b; }
.release-badge::before { content: ""; display: inline-block; width: 5px; height: 5px; background: currentColor; border-radius: 50%; margin: 0 7px 1px 0; }
.release-format { color: #89938d; font: 10px ui-monospace, Consolas, monospace; padding: 5px 8px; border: 1px solid #42494a; border-radius: 5px; }
.release-version { font-size: clamp(58px, 6vw, 82px); font-weight: 550; line-height: 1.1; letter-spacing: -.065em; margin: 25px 0 14px; }
.release-card h2 { font-size: 18px; line-height: 1.4; letter-spacing: -.015em; margin: 0 0 10px; }
.release-summary { font-size: 13px; color: #a8afac; margin: 0 0 24px; }
.release-meta { display: grid; grid-template-columns: 1fr 1fr; margin: 0 0 24px; padding-top: 18px; border-top: 1px solid #ffffff18; gap: 16px; }
.release-meta dt { color: #a0aaa4; font-size: 10px; margin-bottom: 5px; }
.release-meta dd { font-size: 14px; margin: 0; }
.download-button { width: 100%; gap: 12px; min-height: 54px; box-shadow: none; font-size: 14px; }
.download-condition { font-size: 11px; color: #b7bcb6; line-height: 1.6; margin: 16px 0 0; }
.catalog-error { color: #f4bd9a; font-size: 13px; }
.retry-button { border: 1px solid #aaa; background: transparent; color: white; border-radius: 10px; padding: 8px 14px; cursor: pointer; }
.center-content { padding-top: 34px; }
.compatibility-notice { display: flex; align-items: flex-start; gap: 18px; padding: 25px 30px; border-radius: 18px; border: 1px solid #d7c6ad; background: #efe7d9; }
.notice-symbol { flex: 0 0 23px; border: 1px solid #9e8057; border-radius: 50%; text-align: center; font-size: 14px; margin-top: 2px; color: #75532c; }
.compatibility-notice h2 { font-size: 17px; letter-spacing: 0; margin: 0 0 9px; }
.compatibility-notice p { font-size: 13px; margin: 7px 0; color: #665d51; }
.compatibility-notice a { display: inline-block; color: #715025; font-size: 12px; border-bottom: 1px solid #ad9270; margin-top: 5px; }
.supported-versions span { font-variant-numeric: tabular-nums; color: var(--ink); }
.center-section { padding: 66px 0; border-bottom: 1px solid var(--line); }
.release-details, .center-faq, .history-section { display: grid; grid-template-columns: .82fr 1.18fr; gap: 70px; }
.section-heading .center-eyebrow { font-size: 10px; margin-bottom: 16px; }
.section-heading h2 { font-size: 34px; letter-spacing: -.035em; line-height: 1.25; margin: 0 0 16px; }
.section-heading > p:last-child { max-width: 360px; font-size: 14px; color: #6b6f69; margin: 0; line-height: 1.8; }
.change-list { padding: 0; margin: 0; list-style: none; }
.change-list li { position: relative; padding: 0 0 18px 25px; font-size: 15px; }
.change-list li::before { content: "+"; position: absolute; left: 0; color: #937048; }
.known-note { padding: 15px 18px; border-radius: 10px; background: #e8e4dc; }
.known-note strong { font-size: 12px; }
.known-note p { font-size: 12px; color: #62665f; line-height: 1.8; margin: 6px 0 0; }
.checksum-details { margin-top: 22px; }
.checksum-details summary { cursor: pointer; font-size: 12px; color: #62665f; padding: 8px 0; }
.checksum-details p { font-size: 12px; color: #686d65; }
.checksum-details code { display: block; overflow-wrap: anywhere; background: #e7e4dc; border-radius: 8px; padding: 14px; font-size: 12px; user-select: all; }
.copy-checksum { margin-top: 12px; padding: 8px 12px; border: 1px solid #b8bcb2; background: transparent; border-radius: 6px; cursor: pointer; font-size: 12px; }
.copy-checksum:disabled { opacity: .5; cursor: default; }
.copy-status:empty { display: none; }
.install-section .section-heading { max-width: 710px; }
.install-section .section-heading > p:last-child { max-width: 670px; }
.install-steps { display: grid; grid-template-columns: 1fr 1fr; column-gap: 52px; row-gap: 32px; list-style: none; padding: 0; margin: 38px 0 28px; }
.install-steps li { display: flex; gap: 18px; border-top: 1px solid var(--line); padding-top: 23px; }
.step-count { flex: 0 0 30px; color: #897251; font: 14px ui-monospace, Consolas, monospace; padding-top: 5px; }
.install-steps h3 { margin: 0 0 12px; font-size: 17px; font-weight: 600; line-height: 1.5; }
.install-steps p { margin: 0; font-size: 13px; color: #636a61; line-height: 1.85; }
.install-steps code { display: inline-block; overflow-wrap: anywhere; font-size: 12px; padding: 8px 10px; background: #e6e2d8; border-radius: 6px; margin: 13px 0 10px; }
.install-steps .step-small { font-size: 11px; }
.install-warning { display: flex; align-items: baseline; gap: 18px; padding: 16px 20px; background: #e8e4dc; border-radius: 10px; }
.install-warning > span { font-size: 24px; color: #806846; }
.install-warning p { margin: 0; font-size: 12px; color: #62675f; }
.library-item { padding: 24px; border: 1px solid #d4d4cb; border-radius: 16px; background: #fcfaf4; }
.library-item + .library-item { margin-top: 16px; }
.library-item-top { display: flex; justify-content: space-between; gap: 20px; align-items: baseline; }
.library-item h3 { margin: 0; font-size: 21px; letter-spacing: -.03em; }
.library-item .library-kind { font-size: 10px; color: #756046; }
.library-item p { color: #686d65; font-size: 12px; margin: 12px 0; }
.library-item a { display: inline-flex; font-size: 13px; padding-bottom: 5px; border-bottom: 1px solid #a8977e; }
.center-faq details { border-bottom: 1px solid var(--line); }
.center-faq details:first-child { border-top: 1px solid var(--line); }
.center-faq summary { font-size: 15px; font-weight: 600; padding: 20px 26px 20px 0; cursor: pointer; position: relative; list-style: none; }
.center-faq summary::-webkit-details-marker { display: none; }
.center-faq summary::after { content: "+"; position: absolute; right: 0; top: 20px; color: #7f897b; }
.center-faq details[open] summary::after { content: "−"; }
.center-faq details p { font-size: 13px; color: #636a61; line-height: 1.9; margin: 0 0 22px; }
.center-help { margin: 45px 0; display: flex; justify-content: space-between; align-items: center; gap: 40px; background: var(--ink); color: var(--white); border-radius: 18px; padding: 32px; }
.center-help h2 { font-size: 21px; margin: 0 0 8px; letter-spacing: -.01em; }
.center-help p { font-size: 12px; color: #a4ada5; margin: 0; max-width: 630px; }
.center-help .button { flex: 0 0 auto; }
.center-footer { display: flex; justify-content: space-between; gap: 20px; color: #757b70; font-size: 11px; padding: 10px 0 30px; }
.no-script { background: #ffe3b5; color: #3c2815; padding: 25px; text-align: center; }
@media(min-width: 821px) { .download-center .brand-copy small { font-size: 7px; } }
@media(max-width: 1080px) { .hero-center-grid { gap: 35px; } .center-intro h1 { font-size: 42px; } .release-details, .center-faq, .history-section { gap: 35px; } }
@media(max-width: 820px) { .download-hero { padding-top: 116px; } .hero-center-grid { grid-template-columns: 1fr; gap: 35px; } .center-intro h1 { font-size: 48px; } .center-lead { max-width: 580px; } .release-card { max-width: 590px; width: 100%; } .release-details, .center-faq, .history-section { grid-template-columns: 1fr; gap: 28px; } .section-heading > p:last-child { max-width: 620px; } .center-assurances { margin-top: 24px; } .center-help { align-items: flex-start; flex-direction: column; gap: 20px; } }
@media(max-width: 560px) {
  .download-center .nav-shell { gap: 10px; } .center-nav { display: none; } .download-center .language-switch { margin-left: auto; }
  .download-hero { padding: 100px 0 30px; } .hero-center-grid { gap: 26px; }
  .center-eyebrow { font-size: 9px; margin-bottom: 19px; } .center-intro h1 { font-size: clamp(32px, 8.9vw, 44px); margin-bottom: 16px; }
  .center-lead { font-size: 13px; line-height: 1.7; margin-bottom: 16px; } .center-guide-link { font-size: 11px; gap: 12px; }
  .center-assurances { display: none; } .release-card { padding: 23px; border-radius: 19px; }
  .release-version { font-size: 62px; margin: 18px 0 10px; } .release-card h2 { font-size: 16px; } .release-summary { font-size: 12px; margin-bottom: 16px; }
  .release-meta { margin-bottom: 18px; padding-top: 13px; } .download-button { font-size: 13px; } .download-condition { font-size: 10px; }
  .center-content { padding-top: 22px; } .compatibility-notice { padding: 19px 17px; gap: 12px; border-radius: 14px; }
  .compatibility-notice h2 { font-size: 15px; } .compatibility-notice p { font-size: 12px; }
  .center-section { padding: 38px 0; } .section-heading .center-eyebrow { font-size: 9px; margin-bottom: 12px; }
  .section-heading h2 { font-size: 28px; margin-bottom: 12px; } .section-heading > p:last-child { font-size: 13px; }
  .change-list li { font-size: 13px; padding-bottom: 16px; } .install-steps { grid-template-columns: 1fr; gap: 20px; margin-top: 24px; }
  .install-steps li { gap: 11px; padding-top: 18px; } .install-steps h3 { font-size: 15px; margin-bottom: 8px; }
  .install-steps p { font-size: 12px; } .step-count { font-size: 12px; flex-basis: 22px; }
  .install-warning { padding: 13px; gap: 10px; } .install-warning p { font-size: 11px; }
  .library-item { padding: 20px; } .center-faq summary { font-size: 14px; padding-block: 17px; }
  .center-help { padding: 23px; margin-block: 30px; } .center-help h2 { font-size: 19px; } .center-help .button { min-height: 46px; }
  .center-footer { font-size: 10px; }
}