:root {
  --ink: #111315;
  --paper: #f5f2eb;
  --white: #fffefa;
  --coral: #f05b45;
  --teal: #139b91;
  --muted: #626561;
  --line: #c8c4bb;
  --shell: 1180px;
  --header: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, Helvetica, sans-serif; line-height: 1.7; }
a { color: inherit; }
img { display: block; max-width: 100%; height: auto; }
button, a { -webkit-tap-highlight-color: transparent; }
.shell { width: min(calc(100% - 48px), var(--shell)); margin-inline: auto; }
.site-header { position: sticky; top: 0; z-index: 50; min-height: var(--header); background: rgba(245,242,235,.96); border-bottom: 1px solid var(--ink); }
.header-inner { min-height: var(--header); display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 900; font-size: 1.1rem; }
.brand img { width: 38px; height: 38px; border: 1px solid var(--ink); object-fit: cover; }
.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav a { padding: 8px 12px; text-decoration: none; font-size: .92rem; font-weight: 700; border-bottom: 2px solid transparent; }
.site-nav a:hover, .site-nav a.active { border-color: var(--coral); }
.site-nav .nav-download { margin-left: 8px; padding-inline: 18px; color: var(--white); background: var(--ink); border: 1px solid var(--ink); }
.site-nav .nav-download:hover { color: var(--ink); background: var(--coral); border-color: var(--ink); }
.menu-button { display: none; width: 42px; height: 42px; padding: 10px; border: 1px solid var(--ink); background: transparent; cursor: pointer; }
.menu-button span { display: block; height: 2px; background: var(--ink); margin-block: 4px; }

.hero { background: var(--paper); border-bottom: 1px solid var(--ink); }
.hero-inner { min-height: 590px; display: grid; grid-template-columns: minmax(0, .9fr) minmax(420px, 1.1fr); gap: clamp(40px, 7vw, 92px); align-items: center; padding-block: 36px 28px; }
.eyebrow { display: flex; align-items: center; gap: 12px; width: max-content; margin-bottom: 18px; border-top: 1px solid var(--ink); padding-top: 8px; font: 700 .76rem/1 Arial, sans-serif; letter-spacing: .08em; }
.eyebrow b { display: grid; place-items: center; min-width: 30px; height: 24px; color: var(--white); background: var(--coral); letter-spacing: 0; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 560px; margin-bottom: 18px; font-size: clamp(2.45rem, 5vw, 4.8rem); line-height: 1.05; font-weight: 900; letter-spacing: 0; }
h1 > span { display: block; }
.hero-copy > p { max-width: 590px; margin-bottom: 24px; color: #444743; font-size: 1.02rem; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 26px; }
.button { min-width: 142px; min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 10px 20px; border: 1px solid var(--ink); text-decoration: none; font-weight: 800; transition: transform .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { background: var(--coral); color: var(--ink); }
.button.secondary { background: transparent; }
.hero-notes { display: flex; flex-wrap: wrap; gap: 14px 22px; padding: 0; margin: 0; list-style: none; font-size: .85rem; font-weight: 700; }
.hero-notes li { display: flex; align-items: center; gap: 7px; }
.hero-notes span { color: var(--teal); font: 800 .72rem Arial, sans-serif; }
.hero-media { min-width: 0; height: 462px; display: grid; grid-template-columns: 1.35fr .65fr; gap: 12px; align-items: center; }
.screen { position: relative; margin: 0; min-width: 0; overflow: hidden; background: var(--white); border: 1px solid var(--ink); }
.screen img { width: 100%; max-width: 400px; height: 185px; object-fit: cover; object-position: top; }
.screen figcaption { padding: 7px 9px; border-top: 1px solid var(--ink); font: 800 .65rem/1 Arial, sans-serif; letter-spacing: .06em; }
.screen-main { transform: translateY(-6px); }
.screen-main img { height: 390px; }
.screen-side { display: grid; gap: 12px; }
.screen-side .screen:last-child { transform: translateX(16px); }
.hero-status { border-top: 1px solid var(--ink); background: var(--ink); color: var(--white); }
.hero-status .shell { min-height: 42px; display: flex; align-items: center; gap: 26px; font-size: .78rem; }
.hero-status span:first-child { color: var(--coral); font: 800 .72rem Arial, sans-serif; letter-spacing: .08em; }

.section { padding-block: clamp(64px, 8vw, 104px); }
.section-heading { display: grid; grid-template-columns: 118px 1fr; gap: 18px; align-items: baseline; margin-bottom: 34px; }
.section-heading span { color: var(--teal); font: 800 .72rem Arial, sans-serif; letter-spacing: .08em; }
.section-heading h2 { margin: 0; font-size: clamp(1.8rem, 3vw, 2.8rem); line-height: 1.1; }
.queue-section { background: var(--white); }
.queue-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ink); border-left: 1px solid var(--ink); }
.queue-grid article { min-height: 230px; padding: 24px 20px; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.queue-grid b { color: var(--coral); font: 900 2rem/1 Arial, sans-serif; }
.queue-grid h3 { margin: 42px 0 8px; font-size: 1.1rem; }
.queue-grid p { margin: 0; color: var(--muted); font-size: .93rem; }
.gallery-section { border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.gallery-grid figure { margin: 0; }
.image-frame { display: grid; place-items: center; height: 420px; overflow: hidden; background: var(--ink); border: 1px solid var(--ink); }
.image-frame img { width: auto; max-width: 400px; height: 378px; object-fit: contain; }
.gallery-grid figure:nth-child(2) .image-frame { background: var(--teal); }
.gallery-grid figure:nth-child(3) .image-frame { background: var(--coral); }
.gallery-grid figcaption { display: grid; gap: 3px; padding: 14px 0; border-bottom: 1px solid var(--ink); }
.gallery-grid figcaption b { font-size: 1.06rem; }
.gallery-grid figcaption span { color: var(--muted); font-size: .9rem; }
.features-section { color: var(--white); background: var(--ink); }
.feature-layout { display: grid; grid-template-columns: .65fr 1.35fr; gap: 70px; }
.section-heading.light { display: block; align-self: start; position: sticky; top: 110px; }
.section-heading.light span { display: block; color: var(--coral); margin-bottom: 16px; }
.section-heading.light h2 { color: var(--white); font-size: clamp(2.2rem, 4vw, 4rem); }
.feature-list { border-top: 1px solid #777874; }
.feature-list article { display: grid; grid-template-columns: 110px 150px 1fr; gap: 20px; align-items: baseline; padding-block: 26px; border-bottom: 1px solid #777874; }
.feature-list article > span { color: #79d6ce; font: 800 .7rem Arial, sans-serif; letter-spacing: .08em; }
.feature-list h3 { margin: 0; font-size: 1.05rem; }
.feature-list p { margin: 0; color: #c9cac5; font-size: .94rem; }
.help-section { background: var(--white); }
.help-layout { display: grid; grid-template-columns: 1.25fr .75fr; gap: 66px; align-items: start; }
.faq-preview { border-top: 1px solid var(--ink); }
.faq-preview details { border-bottom: 1px solid var(--ink); }
.faq-preview summary { padding: 18px 4px; cursor: pointer; font-weight: 800; }
.faq-preview p { margin: 0; padding: 0 4px 20px; color: var(--muted); }
.support-panel { padding: 30px; color: var(--white); background: var(--teal); border: 1px solid var(--ink); }
.support-panel > span { color: var(--ink); font: 800 .7rem Arial, sans-serif; letter-spacing: .08em; }
.support-panel h3 { margin: 42px 0 12px; font-size: 1.6rem; line-height: 1.2; }
.support-panel p { color: #e7fffb; }
.support-panel a { display: block; padding: 12px 0; border-top: 1px solid rgba(255,255,255,.55); text-decoration: none; font-weight: 800; }
.support-panel a:last-child { border-bottom: 1px solid rgba(255,255,255,.55); }
.download-band { color: var(--white); background: #292c2b; border-top: 1px solid var(--ink); }
.download-inner { min-height: 180px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.download-inner span { color: #79d6ce; font: 800 .72rem Arial, sans-serif; letter-spacing: .08em; }
.download-inner h2 { margin: 10px 0 0; font-size: clamp(1.8rem, 3.5vw, 3.2rem); line-height: 1.1; }

.inner-main { background: var(--white); }
.inner-hero { color: var(--white); background: #292c2b; border-bottom: 1px solid var(--ink); }
.inner-hero-grid { min-height: 500px; display: grid; grid-template-columns: 1fr 320px; align-items: center; gap: 80px; padding-block: 44px; }
.inner-hero h1 { font-size: clamp(2.3rem, 4.6vw, 4.4rem); }
.inner-hero p { max-width: 680px; color: #d8dad5; }
.inner-hero .eyebrow { border-color: #d8dad5; }
.inner-hero figure { margin: 0; display: grid; place-items: center; }
.inner-hero figure img { width: auto; max-width: 400px; height: 360px; object-fit: contain; }
.inner-hero figcaption { width: 100%; padding: 8px; text-align: center; color: var(--ink); background: var(--coral); border: 1px solid var(--ink); font: 800 .68rem Arial, sans-serif; letter-spacing: .08em; }
.article-section { padding-block: 70px 100px; }
.article-layout { display: grid; grid-template-columns: 220px minmax(0, 760px); justify-content: space-between; gap: 70px; }
.article-index { position: sticky; top: 104px; align-self: start; display: grid; border-top: 1px solid var(--ink); }
.article-index b, .article-index a { padding: 12px 2px; border-bottom: 1px solid var(--line); }
.article-index b { color: var(--coral); font: 800 .72rem Arial, sans-serif; letter-spacing: .08em; }
.article-index a { text-decoration: none; font-size: .92rem; }
.article-content > section { position: relative; padding: 0 0 52px 76px; scroll-margin-top: 110px; }
.article-content h2 { margin-bottom: 18px; font-size: clamp(1.55rem, 2.8vw, 2.25rem); }
.article-content p { color: #424541; }
.article-number { position: absolute; left: 0; top: 2px; width: 46px; height: 30px; display: grid; place-items: center; color: var(--white); background: var(--teal); font: 800 .78rem Arial, sans-serif; }
.checklist { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--ink); border-left: 1px solid var(--ink); }
.checklist span { padding: 12px; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); font-weight: 700; }
.note-box { margin-top: 24px; padding: 20px; background: var(--paper); border-left: 5px solid var(--coral); }
.note-box p { margin: 6px 0 0; }
.faq-hero { background: var(--teal); }
.faq-hero p { color: #ecfffc; }
.faq-hero .button.primary { background: var(--white); }
.faq-hero figcaption { background: var(--ink); color: var(--white); }
.faq-catalog { padding-block: 72px 100px; }
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; }
.faq-grid details { border-top: 1px solid var(--ink); }
.faq-grid details:nth-last-child(-n+2) { border-bottom: 1px solid var(--ink); }
.faq-grid summary { min-height: 72px; display: flex; align-items: center; gap: 14px; padding: 16px 4px; cursor: pointer; font-weight: 800; list-style: none; }
.faq-grid summary::-webkit-details-marker { display: none; }
.faq-grid summary span { flex: 0 0 34px; color: var(--coral); font: 900 .86rem Arial, sans-serif; }
.faq-grid details div { padding: 0 12px 22px 52px; }
.faq-grid details p { margin: 0; color: var(--muted); }
.answer-note { margin-top: 48px; padding: 24px; display: grid; grid-template-columns: 180px 1fr; gap: 24px; background: var(--paper); border: 1px solid var(--ink); }
.answer-note p { margin: 0; }
.answer-note a { color: #087a72; font-weight: 800; }

.site-footer { padding-block: 36px; color: #d7d8d4; background: var(--ink); border-top: 1px solid #343735; }
.footer-inner { display: grid; place-items: center; gap: 15px; text-align: center; }
.footer-inner > div { display: flex; align-items: center; gap: 9px; }
.footer-inner img { width: 32px; height: 32px; object-fit: cover; }
.footer-inner nav { display: flex; justify-content: center; flex-wrap: wrap; gap: 18px; }
.footer-inner nav a { text-decoration: none; font-size: .88rem; }
.footer-inner p { max-width: 760px; margin: 0; color: #aeb0ab; font-size: .84rem; text-align: center; }
.footer-inner small { color: #828580; text-align: center; }

@media (max-width: 900px) {
  .menu-button { display: block; }
  .site-nav { display: none; position: absolute; top: calc(100% + 1px); left: 24px; right: 24px; padding: 10px; background: var(--white); border: 1px solid var(--ink); }
  .site-nav.open { display: grid; }
  .site-nav a { text-align: center; border: 0; }
  .site-nav .nav-download { margin-left: 0; }
  .hero-inner { grid-template-columns: .9fr 1.1fr; gap: 34px; }
  .hero-media { height: 400px; }
  .screen-main img { height: 330px; }
  .screen img { height: 154px; }
  .queue-grid { grid-template-columns: 1fr 1fr; }
  .gallery-grid { gap: 14px; }
  .image-frame { height: 360px; }
  .image-frame img { height: 320px; }
  .feature-layout, .help-layout { grid-template-columns: 1fr; gap: 42px; }
  .section-heading.light { position: static; }
  .inner-hero-grid { grid-template-columns: 1fr 250px; gap: 44px; }
  .article-layout { grid-template-columns: 180px 1fr; gap: 38px; }
}

@media (max-width: 680px) {
  :root { --header: 64px; }
  .shell { width: min(calc(100% - 28px), var(--shell)); }
  .brand img { width: 34px; height: 34px; }
  .hero-inner { min-height: auto; grid-template-columns: 1fr; gap: 22px; padding-block: 24px 18px; }
  h1 { font-size: clamp(2.1rem, 11vw, 3rem); line-height: 1.08; }
  .hero-copy > p { margin-bottom: 18px; font-size: .94rem; }
  .hero-actions { margin-bottom: 18px; }
  .hero-notes { display: none; }
  .hero-media { height: 214px; grid-template-columns: 1.32fr .68fr; gap: 8px; }
  .screen-main { transform: none; }
  .screen-main img { height: 180px; }
  .screen img { height: 81px; }
  .screen figcaption { padding: 5px 6px; font-size: .56rem; }
  .screen-side { gap: 8px; }
  .screen-side .screen:last-child { transform: none; }
  .hero-status .shell { min-height: 38px; gap: 14px; white-space: nowrap; overflow: hidden; }
  .section { padding-block: 58px; }
  .section-heading { grid-template-columns: 88px 1fr; margin-bottom: 26px; }
  .queue-grid { grid-template-columns: 1fr; }
  .queue-grid article { min-height: auto; }
  .queue-grid h3 { margin-top: 20px; }
  .gallery-grid { grid-template-columns: 1fr; gap: 30px; }
  .image-frame { height: 390px; }
  .image-frame img { height: 350px; }
  .feature-list article { grid-template-columns: 80px 1fr; gap: 12px; }
  .feature-list article p { grid-column: 1 / -1; }
  .download-inner { min-height: 190px; align-items: flex-start; flex-direction: column; justify-content: center; }
  .download-inner .button { width: 100%; }
  .inner-hero-grid { min-height: auto; grid-template-columns: 1fr; gap: 24px; padding-block: 34px 24px; }
  .inner-hero h1 { font-size: 2.45rem; }
  .inner-hero figure img { height: 230px; }
  .article-section, .faq-catalog { padding-block: 54px 70px; }
  .article-layout { grid-template-columns: 1fr; gap: 46px; }
  .article-index { position: static; grid-template-columns: 1fr 1fr; }
  .article-index b { grid-column: 1 / -1; }
  .article-content > section { padding-left: 58px; padding-bottom: 42px; }
  .checklist { grid-template-columns: 1fr; }
  .faq-grid { grid-template-columns: 1fr; }
  .faq-grid details:nth-last-child(2) { border-bottom: 0; }
  .answer-note { grid-template-columns: 1fr; gap: 8px; }
}

@media (max-width: 390px) {
  .hero-copy > p { font-size: .9rem; line-height: 1.62; }
  .button { min-height: 44px; }
  .hero-media { height: 200px; }
  .screen-main img { height: 166px; }
  .screen img { height: 74px; }
  .hero-status span:nth-child(4) { display: none; }
  .inner-hero h1 { font-size: 2.2rem; }
}