:root {
  color-scheme: light;
  --brand: #0c6d7b;
  --brand-deep: #075766;
  --ink: #203239;
  --muted: #62747b;
}

*, *::before, *::after { box-sizing: border-box; }
html { font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif; scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #fff; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 2px solid #ffcd00; outline-offset: 4px; }
.skip-link { position: absolute; z-index: 10; top: -60px; left: 12px; padding: 10px 14px; color: #fff; background: var(--brand-deep); }
.skip-link:focus { top: 12px; }

.home-hero { position: relative; isolation: isolate; overflow: hidden; aspect-ratio: 5184 / 2340; color: #fff; background: radial-gradient(circle at 14% 25%, rgb(255 255 255 / 9%) 0 7%, transparent 7.1%), radial-gradient(circle at 86% 34%, rgb(255 255 255 / 7%) 0 10%, transparent 10.1%), linear-gradient(160deg, transparent 0 49%, rgb(0 60 74 / 14%) 49.1% 72%, transparent 72.1%), linear-gradient(145deg, #0e7181, #086879); }
.home-hero::after { content: ""; position: absolute; z-index: 1; right: -6%; bottom: -6%; left: -6%; height: 15%; border-radius: 50% 50% 0 0; background: #fff; }
.home-tail { position: relative; overflow: hidden; aspect-ratio: 5184 / 7734; }
.home-tail picture, .home-tail picture img { display: block; width: 100%; }
.home-tail picture img { position: absolute; top: -31.03%; left: 0; max-width: none; }
.home-logo { position: absolute; z-index: 2; top: 43px; left: 42px; width: 90px; }
.home-mobile-nav { display: none; }
.hero-brand { position: absolute; z-index: 2; top: 22%; left: 50%; display: flex; align-items: center; gap: 18px; margin: 0; transform: translateX(-50%); white-space: nowrap; font-size: clamp(30px, 3vw, 46px); font-weight: 300; }
.hero-brand img { width: clamp(58px, 6vw, 85px); }
.hero-tagline { position: absolute; z-index: 2; top: 40%; left: 50%; display: flex; gap: clamp(20px, 3vw, 55px); margin: 0; transform: translateX(-50%); white-space: nowrap; font-size: clamp(25px, 2.8vw, 40px); font-weight: 300; }
.hero-tagline strong { font-weight: 700; }
.download-options { position: absolute; z-index: 2; top: 71%; left: 25%; width: 48.6%; display: flex; justify-content: space-around; align-items: flex-start; }
.download-options a { position: relative; display: block; width: 17.9%; transition: transform .18s ease; }
.download-options a:nth-child(2), .download-options a:nth-child(3) { transform: translateY(16%); }
.download-options a:hover { transform: translateY(-3px); }
.download-options a:nth-child(2):hover, .download-options a:nth-child(3):hover { transform: translateY(calc(16% - 3px)); }
.download-options img { width: 100%; }
.install-link { display: none; }

.home-copy { max-width: 1050px; margin: 0 auto; padding: 48px 24px 72px; }
.home-copy h2 { margin: 0; color: var(--brand-deep); font-size: clamp(28px, 3vw, 38px); font-weight: 700; line-height: 1.35; text-align: center; }
.home-lede { max-width: 780px; margin: 16px auto 36px; color: var(--muted); font-size: 17px; line-height: 1.85; text-align: center; }
.feature-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.feature-list article { padding: 24px 22px; border: 1px solid #e3eff1; border-radius: 18px; background: #f8fcfc; }
.feature-list h3 { margin: 0 0 10px; color: var(--brand); font-size: 21px; }
.feature-list p { margin: 0; color: #50656d; font-size: 15px; line-height: 1.75; }
.home-note { margin: 26px 0 0; color: var(--muted); font-size: 13px; line-height: 1.6; text-align: center; }

.news-section { padding: 0 24px 78px; }
.news { max-width: 1050px; margin: 0 auto; padding: 42px 48px 46px; border: 1px solid #e3eff1; border-radius: 24px; background: #f8fcfc; }
.news-title { margin: 0; color: var(--brand-deep); font-size: clamp(27px, 3vw, 36px); line-height: 1.35; text-align: center; }
.news-desc { max-width: 780px; margin: 14px auto 30px; color: var(--muted); font-size: 16px; line-height: 1.8; text-align: center; }
.news-list { margin: 0; padding: 0; list-style: none; font-size: 0; }
.news-item { display: flex; gap: 20px; align-items: baseline; justify-content: space-between; padding: 17px 4px; border-top: 1px solid #dcebed; font-size: 16px; line-height: 1.6; }
.news-item:last-child { border-bottom: 1px solid #dcebed; }
.news-link { color: var(--ink); font-weight: 600; overflow-wrap: anywhere; }
.news-link:hover { color: var(--brand); text-decoration: underline; text-underline-offset: 4px; }
.news-summary { color: var(--muted); font-size: 14px; text-align: right; }
.news-more { margin-top: 32px; text-align: center; }
.news-more a { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; padding: 11px 25px; border-radius: 999px; background: var(--brand); color: #fff; font-size: 15px; font-weight: 700; }
.news-more a:hover { background: var(--brand-deep); }

.blog-hero { position: relative; overflow: hidden; min-height: 300px; padding: 80px 24px 54px; color: #fff; text-align: center; background: radial-gradient(circle at 14% 25%, rgb(255 255 255 / 9%) 0 7%, transparent 7.1%), radial-gradient(circle at 86% 34%, rgb(255 255 255 / 7%) 0 10%, transparent 10.1%), linear-gradient(145deg, #0e7181, #086879); }
.blog-logo { position: absolute; top: 27px; left: 34px; width: 62px; }
.blog-top-nav { position: absolute; top: 34px; right: 36px; display: flex; gap: 20px; font-size: 15px; }
.blog-top-nav a:hover, .blog-top-nav a[aria-current="page"] { color: #ffdf65; }
.blog-kicker { margin: 0 0 10px; color: #ccecef; font-size: 15px; letter-spacing: .08em; }
.blog-hero-title { margin: 0; font-size: clamp(33px, 4vw, 48px); font-weight: 700; line-height: 1.3; }
.blog-intro { max-width: 650px; margin: 16px auto 0; color: #e4f2f4; font-size: 16px; line-height: 1.7; }
.site-main { padding: 54px 24px 80px; background: #fff; }
.site-main .container { max-width: 1120px; margin: 0 auto; }
.news-wrap .features { display: grid; grid-template-columns: 188px minmax(0, 1fr); gap: 26px; align-items: start; }
.news-wrap .left ul { margin: 0; padding: 12px; list-style: none; border: 1px solid #e3eff1; border-radius: 18px; background: #f8fcfc; }
.news-wrap .left a { display: block; padding: 12px 16px; border-radius: 11px; color: var(--brand-deep); font-size: 16px; font-weight: 700; }
.news-wrap .left a.active { background: var(--brand); color: #fff; }
.news-wrap .right { min-width: 0; padding: 36px 40px; border: 1px solid #e3eff1; border-radius: 20px; background: #f8fcfc; font-size: 0; }
.blog-detail, .newsc { font-size: 16px; }
.blog-detail .title { margin: 0; color: var(--brand-deep); font-size: clamp(26px, 3vw, 36px); line-height: 1.4; overflow-wrap: anywhere; }
.blog-detail .post-time { margin: 16px 0 28px; padding-bottom: 22px; border-bottom: 1px solid #dcebed; color: var(--muted); font-size: 14px; }
.blog-detail .content { color: #314850; font-size: 16px; line-height: 1.9; overflow-wrap: anywhere; }
.blog-detail .content > :first-child { margin-top: 0; }
.blog-detail .content p { margin: 0 0 1.3em; }
.blog-detail .content h2, .blog-detail .content h3 { margin: 1.7em 0 .65em; color: var(--brand-deep); line-height: 1.4; }
.blog-detail .content img, .blog-detail .content video, .blog-detail .content iframe { max-width: 100%; height: auto; border-radius: 10px; }
.blog-detail .content pre, .blog-detail .content table { display: block; max-width: 100%; overflow-x: auto; }
.blog-detail .content a, .article-nav a { color: var(--brand); text-decoration: underline; text-underline-offset: 3px; }
.article-nav { margin-top: 32px; padding-top: 18px; border-top: 1px solid #dcebed; color: var(--muted); font-size: 14px; line-height: 1.7; }
.article-nav p { margin: 8px 0; }
.blog-detail-back { display: inline-block; margin-top: 18px; color: var(--brand); font-size: 15px; font-weight: 700; }
.blog-detail-back:hover { text-decoration: underline; }
.newsc h1 { margin: 0 0 12px; color: var(--brand-deep); font-size: 29px; line-height: 1.4; }
.post-list { margin: 0; padding: 0; list-style: none; font-size: 0; }
.post-list li { display: flex; gap: 24px; padding: 25px 0; border-bottom: 1px solid #dcebed; font-size: 16px; }
.post-thumb { flex: 0 0 220px; overflow: hidden; border-radius: 12px; background: #dcebed; }
.post-thumb a { display: block; height: 150px; }
.post-thumb img { width: 100%; height: 100%; object-fit: cover; }
.post-summary { display: flex; min-width: 0; flex: 1; flex-direction: column; justify-content: space-between; }
.post-summary h3 { margin: 0 0 8px; color: var(--ink); font-size: 20px; line-height: 1.45; overflow-wrap: anywhere; }
.post-summary h3 a:hover { color: var(--brand); }
.post-summary p { margin: 0; color: #50656d; font-size: 15px; line-height: 1.7; overflow-wrap: anywhere; }
.post-summary p a { color: var(--brand); font-weight: 700; }
.post-date { display: block; margin-top: 16px; color: var(--muted); font-size: 13px; text-align: right; }
.resource-intro { margin: 0 0 18px; color: #50656d; line-height: 1.8; }
.resource-list { margin: 0; padding: 0; list-style: none; }
.resource-list li { padding: 20px 0; border-top: 1px solid #dcebed; }
.resource-list h3 { margin: 0 0 8px; color: var(--brand-deep); font-size: 21px; line-height: 1.4; }
.resource-list h3 a:hover { text-decoration: underline; }
.resource-list p { margin: 0; color: #50656d; font-size: 15px; line-height: 1.8; }
.article-section { margin: 28px 0 38px; }
.article-section h2, .resource-section > h2 { margin: 0 0 12px; color: var(--brand-deep); font-size: 23px; line-height: 1.4; }
.article-empty { margin: 0; padding: 18px 0; color: var(--muted); font-size: 15px; }
.pages { margin-top: 26px; font-size: 0; text-align: center; }
.pages a, .pages span { display: inline-block; min-width: 36px; margin: 0 3px 6px; padding: 7px 10px; border: 1px solid #dcebed; border-radius: 7px; color: var(--brand); font-size: 14px; }
.pages .active, .pages .current { background: var(--brand); color: #fff; }

.site-footer { min-height: 130px; padding: 30px 20px 22px; color: #fff; text-align: center; background: var(--brand) url("../images/footer-band.png") center/cover no-repeat; }
.site-footer nav { font-size: 19px; line-height: 1.6; }
.site-footer nav a:hover { text-decoration: underline; text-underline-offset: 4px; }
.site-footer small { display: block; margin-top: 6px; font-size: 13px; }

.info-page { position: relative; min-height: 100vh; overflow: hidden; color: #fff; text-align: center; background: var(--brand); }
.info-page > picture { position: absolute; inset: 0; }
.info-background { display: block; width: 100%; height: 100%; object-fit: cover; }
.info-background--mobile { display: none; }
.info-logo { position: absolute; z-index: 2; top: 43px; left: 42px; width: 90px; }
.info-logo img { width: 100%; }
.info-nav { position: absolute; z-index: 2; top: 38px; right: 42px; color: #fff; font-size: 16px; line-height: 1.6; }
.info-nav a[aria-current="page"], .info-nav a:hover { color: #ffdf65; }
.info-wrap { position: relative; z-index: 1; width: min(1050px, calc(100% - 48px)); margin: 150px auto 50px; }
.info-wrap h1 { margin: 0 0 20px; font-size: 50px; font-weight: 400; line-height: 1.5; }
.info-panel { min-height: 476px; padding: 45px 20px 45px 38px; border-radius: 16px; background: rgb(0 0 0 / 25%); text-align: left; }
.info-copy { padding-right: 8px; font-size: 18px; font-weight: 300; line-height: 2; letter-spacing: .5px; text-align: justify; }
.info-copy p, .info-copy ul { margin: 0; }
.info-copy h2 { margin: 20px 0 0; font-size: 18px; font-weight: 700; }
.info-copy li { margin-left: 1.5em; }
.info-page--privacy .info-copy h2 { margin-top: 25px; }
.info-page--privacy .info-copy p + p { margin-top: 10px; }
.info-page--contact .info-copy p { margin-top: 10px; }
.info-page--contact .info-copy .contact-details { margin-top: 50px; font-weight: 600; }
.info-copy a { text-decoration: underline; text-underline-offset: 3px; }

.guide-page { width: min(100%, 720px); min-height: 100vh; margin: 0 auto; background: #fff; }
.guide-header { position: relative; overflow: hidden; min-height: 340px; padding: 102px 40px 56px; color: #fff; text-align: center; background: linear-gradient(140deg, #0d7281, #075564); }
.guide-header::before, .guide-header::after { content: ""; position: absolute; border-radius: 50%; background: rgb(255 255 255 / 7%); pointer-events: none; }
.guide-header::before { width: 230px; height: 230px; top: -95px; right: -60px; }
.guide-header::after { width: 160px; height: 160px; bottom: -80px; left: -35px; }
.guide-logo { position: absolute; z-index: 1; top: 21px; left: 16px; width: 45px; min-width: 44px; min-height: 44px; }
.guide-top-nav { position: absolute; z-index: 1; top: 31px; right: 24px; display: flex; gap: 18px; color: #fff; font-size: 15px; }
.guide-top-nav a:hover { color: #ffdf65; }
.guide-kicker { margin: 0 0 12px; color: #b5e8ed; font-size: 15px; letter-spacing: .12em; }
.guide-header h1 { position: relative; margin: 0; font-size: clamp(28px, 5vw, 39px); line-height: 1.35; }
.guide-header p:last-child { position: relative; max-width: 520px; margin: 18px auto 0; color: #d9f0f2; font-size: 15px; line-height: 1.8; }
.guide-summary { padding: 40px 34px 55px; }
.guide-summary h2 { margin: 0 0 24px; color: var(--brand-deep); font-size: 25px; }
.guide-steps { display: grid; gap: 16px; margin: 0 0 30px; padding: 0; list-style: none; counter-reset: step; }
.guide-steps li { position: relative; min-height: 74px; padding: 17px 18px 17px 64px; border: 1px solid #dcebed; border-radius: 14px; background: #f8fcfc; color: #52646b; font-size: 15px; line-height: 1.7; counter-increment: step; }
.guide-steps li::before { content: counter(step); position: absolute; top: 18px; left: 17px; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--brand); color: #fff; font-weight: 700; }
.guide-steps strong { color: var(--brand-deep); }
.guide-download { display: block; width: fit-content; max-width: 100%; margin: 0 auto; padding: 14px 25px; border-radius: 999px; background: var(--brand); color: #fff; font-weight: 700; line-height: 1.5; text-align: center; }
.guide-download:hover { background: var(--brand-deep); }
.guide-small { margin: 22px 0 0; color: #52646b; font-size: 14px; line-height: 1.8; text-align: center; }
.guide-small a, .guide-back { color: var(--brand-deep); text-decoration: underline; text-underline-offset: 3px; }
.guide-back { display: block; width: fit-content; margin: 26px auto 0; font-size: 14px; }

@media (max-width: 767px) {
  .home-hero { aspect-ratio: 1320 / 2700; }
  .home-hero::after { bottom: -5%; height: 12%; }
  .home-tail { aspect-ratio: 1320 / 8704; }
  .home-tail picture img { top: -31.94%; }
  .home-logo { top: 21px; left: 16px; width: 45px; }
  .home-mobile-nav { display: block; position: absolute; z-index: 2; top: 25px; right: 16px; max-width: calc(100% - 85px); color: #fff; font-size: 13px; line-height: 1.5; text-align: right; }
  .hero-brand { top: 23%; flex-direction: column; gap: 8px; font-size: clamp(26px, 7vw, 35px); }
  .hero-brand img { width: clamp(68px, 22vw, 100px); }
  .hero-tagline { top: 54%; flex-direction: column; gap: 4px; font-size: clamp(23px, 6.4vw, 32px); text-align: center; }
  .download-options { top: 79%; left: 22.73%; width: 54.55%; }
  .download-options a { width: 33.33%; }
  .download-options a:nth-child(2) { transform: none; }
  .download-options a:nth-child(n+3) { display: none; }
  .download-options a:nth-child(2):hover { transform: translateY(-3px); }
  .install-link { display: inline-flex; position: absolute; z-index: 2; top: 89%; left: 50%; transform: translateX(-50%); min-height: 44px; align-items: center; color: #ffcd00; font-size: 15px; white-space: nowrap; text-decoration: underline; text-underline-offset: 3px; }
  .home-copy { padding: 36px 22px 50px; }
  .home-copy h2 { font-size: 26px; }
  .home-lede { font-size: 15px; }
  .feature-list { grid-template-columns: 1fr; gap: 14px; }
  .feature-list article { padding: 20px; }
  .news-section { padding: 0 16px 48px; }
  .news { padding: 30px 20px 32px; border-radius: 18px; }
  .news-desc { margin: 12px auto 22px; font-size: 14px; }
  .news-item { display: block; padding: 15px 2px; font-size: 15px; }
  .news-summary { display: block; margin-top: 5px; font-size: 13px; text-align: left; }
  .news-more { margin-top: 26px; }
  .blog-hero { min-height: 260px; padding: 94px 20px 40px; }
  .blog-logo { top: 22px; left: 16px; width: 45px; }
  .blog-top-nav { top: 32px; right: 20px; gap: 14px; font-size: 14px; }
  .blog-kicker { font-size: 13px; }
  .blog-intro { font-size: 14px; }
  .site-main { padding: 28px 16px 52px; }
  .news-wrap .features { grid-template-columns: 1fr; gap: 15px; }
  .news-wrap .left ul { padding: 7px; border-radius: 13px; }
  .news-wrap .left a { padding: 9px 12px; font-size: 14px; }
  .news-wrap .right { padding: 24px 18px; border-radius: 15px; }
  .newsc h1 { font-size: 24px; }
  .post-list li { display: block; padding: 20px 0; }
  .post-thumb { width: 100%; margin-bottom: 15px; }
  .post-thumb a { height: 190px; }
  .post-summary h3 { font-size: 18px; }
  .blog-detail .content { font-size: 15px; }
  .site-footer nav { font-size: 15px; }

  .info-page { min-width: 0; }
  .info-page > picture { position: absolute; inset: 0; }
  .info-background--desktop { display: none; }
  .info-background--mobile { display: block; }
  .info-logo { top: 21px; left: 16px; width: 45px; }
  .info-nav { top: 23px; right: 16px; max-width: calc(100% - 85px); font-size: 12px; line-height: 1.5; text-align: right; }
  .info-nav a[aria-current="page"] { color: #ffcd00; }
  .info-wrap { width: 100%; margin: 105px auto 30px; padding: 0 17px; }
  .info-wrap h1 { margin-bottom: 20px; font-size: 25px; }
  .info-panel { min-height: 0; padding: 20px; }
  .info-copy { padding-right: 0; font-size: 15px; line-height: 1.8; letter-spacing: .1px; }
  .info-copy h2, .info-page--privacy .info-copy h2 { margin-top: 18px; font-size: 16px; }
  .info-page--contact .info-copy { font-size: 15px; line-height: 1.8; }
  .info-page--contact .info-copy .contact-details { margin-top: 40px; }
  .guide-header { min-height: 330px; padding: 106px 25px 45px; }
  .guide-header h1 { font-size: 28px; }
  .guide-summary { padding: 30px 20px 44px; }
  .guide-summary h2 { font-size: 22px; }
}