:root {
  --brand: #E85D75;
  --brand-strong: #D93F63;
  --accent: #F2A65A;
  --ink: #332D34;
  --deep: #2F2530;
  --muted: #756A73;
  --paper: #FFF9F6;
  --soft: #F8EEF0;
  --white: #FFFFFF;
  --line: rgba(47, 37, 48, .12);
  --line-strong: rgba(47, 37, 48, .2);
  --shadow: 0 20px 60px rgba(69, 38, 52, .12);
  --shadow-soft: 0 12px 34px rgba(69, 38, 52, .08);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --shell: min(1180px, calc(100% - 40px));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-thickness: .08em; text-underline-offset: .2em; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
::selection { background: rgba(232,93,117,.2); }

.shell { width: var(--shell); margin-inline: auto; }
.section { padding-block: 88px; }
.soft-section { background: var(--soft); border-block: 1px solid rgba(47,37,48,.06); }
.top-space { padding-top: 24px; }

.skip-link {
  position: fixed; left: 16px; top: 10px; z-index: 1000; padding: 10px 16px;
  background: var(--deep); color: white; border-radius: 10px; transform: translateY(-160%);
  transition: transform .2s ease;
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky; top: 0; z-index: 100; background: rgba(255,249,246,.9);
  border-bottom: 1px solid rgba(47,37,48,.07); backdrop-filter: blur(16px);
}
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; min-width: 0; }
.brand img { width: 44px; height: 44px; object-fit: contain; border-radius: 14px; }
.brand-word { display: grid; line-height: 1.15; }
.brand-word strong { font-size: 1.08rem; letter-spacing: .02em; }
.brand-word small { color: var(--muted); margin-top: 5px; font-size: .76rem; }
.site-nav { display: flex; align-items: center; gap: 8px; }
.nav-link { display: inline-flex; padding: 10px 14px; border-radius: 999px; text-decoration: none; color: var(--muted); font-weight: 700; font-size: .94rem; }
.nav-link:hover { background: rgba(232,93,117,.08); color: var(--deep); }
.nav-link.is-current { background: var(--deep); color: white; }
.menu-button { display: none; align-items: center; gap: 8px; border: 0; background: var(--deep); color: white; border-radius: 999px; padding: 9px 13px; cursor: pointer; }
.menu-lines { width: 16px; height: 10px; border-block: 2px solid currentColor; position: relative; }
.menu-lines::after { content: ""; position: absolute; top: 3px; left: 0; right: 0; border-top: 2px solid currentColor; }

.hero { padding-block: 64px 78px; display: grid; grid-template-columns: minmax(0,1.05fr) minmax(380px,.95fr); gap: 58px; align-items: center; }
.hero-copy { max-width: 680px; }
.eyebrow { margin: 0 0 12px; color: var(--brand-strong); font-size: .78rem; font-weight: 850; letter-spacing: .14em; text-transform: uppercase; }
.hero h1, .page-hero h1, .desktop-intro h1, .page-title-block h1, .not-found h1 { margin: 0; color: var(--deep); letter-spacing: -.04em; line-height: 1.08; }
.hero h1 { font-size: clamp(2.8rem, 5.8vw, 5.3rem); max-width: 13ch; }
.hero-lead { font-size: 1.12rem; color: var(--muted); margin: 24px 0 0; max-width: 62ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 12px 20px; border-radius: 999px; text-decoration: none; font-weight: 800; border: 1px solid transparent; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
.button:hover { transform: translateY(-2px); }
.button.primary { background: var(--brand-strong); color: white; box-shadow: 0 14px 28px rgba(217,63,99,.22); }
.button.secondary { background: var(--deep); color: white; }
.button.ghost { border-color: var(--line-strong); background: rgba(255,255,255,.48); }
.button.light { background: var(--paper); color: var(--deep); }
.hero-facts { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin: 34px 0 0; }
.hero-facts div { padding: 16px 0; border-top: 1px solid var(--line); }
.hero-facts dt { color: var(--muted); font-size: .8rem; }
.hero-facts dd { margin: 4px 0 0; font-weight: 800; }
.hero-visual { margin: 0; position: relative; }
.hero-visual::before { content: ""; position: absolute; inset: 8% -5% -3% 14%; background: var(--soft); border-radius: 42% 58% 50% 50% / 38% 45% 55% 62%; z-index: -1; }
.hero-visual img { border-radius: 36px; box-shadow: var(--shadow); aspect-ratio: 6/7; object-fit: cover; }
.hero-visual figcaption { margin-top: 12px; color: var(--muted); font-size: .84rem; }

.content-ribbon { border-block: 1px solid var(--line); background: rgba(255,255,255,.42); }
.ribbon-inner { min-height: 62px; display: flex; align-items: center; gap: 20px; overflow-x: auto; scrollbar-width: thin; }
.ribbon-inner > * { flex: 0 0 auto; }
.ribbon-title { font-weight: 850; color: var(--deep); }
.ribbon-inner a { color: var(--muted); text-decoration: none; }
.ribbon-inner a:hover { color: var(--brand-strong); }

.section-head { margin-bottom: 34px; }
.section-head h2 { margin: 0; color: var(--deep); font-size: clamp(2rem,4vw,3.3rem); letter-spacing: -.035em; line-height: 1.15; }
.split-head { display: grid; grid-template-columns: minmax(0,1fr) minmax(260px,.55fr); gap: 42px; align-items: end; }
.split-head > p { margin: 0; color: var(--muted); }

.topic-grid { display: grid; grid-template-columns: repeat(12,1fr); gap: 18px; }
.topic-card { grid-column: span 4; min-height: 250px; padding: 26px; background: white; border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow-soft); overflow: hidden; }
.topic-card-wide { grid-column: span 8; display: grid; grid-template-columns: 1fr .85fr; gap: 24px; }
.topic-card h3, .path-card h3, .article-row h3, .scenario-card h3, .step-card h3, .guide-card h3 { margin: 10px 0 8px; color: var(--deep); line-height: 1.3; }
.topic-card p, .path-card p, .article-row p, .step-card p, .guide-card p { color: var(--muted); }
.topic-card img { width: 100%; height: 100%; min-height: 210px; object-fit: cover; border-radius: 18px; }
.card-tag { display: inline-flex; padding: 5px 10px; background: var(--soft); color: var(--brand-strong); border-radius: 999px; font-size: .74rem; font-weight: 850; letter-spacing: .04em; }

.path-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.path-card { position: relative; padding: 30px; background: rgba(255,255,255,.76); border: 1px solid rgba(47,37,48,.08); border-radius: var(--radius-lg); }
.path-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 7px rgba(242,166,90,.14); display: inline-block; }
.text-link { display: inline-flex; align-items: center; gap: 8px; color: var(--brand-strong); font-weight: 850; text-decoration: none; }
.text-link:hover span { transform: translateX(3px); }
.text-link span { transition: transform .18s ease; }

.feature-split { display: grid; grid-template-columns: minmax(0,.92fr) minmax(0,1.08fr); gap: 58px; align-items: center; }
.feature-split.reverse { grid-template-columns: minmax(0,1.08fr) minmax(0,.92fr); }
.feature-image { margin: 0; }
.feature-image img { border-radius: var(--radius-xl); box-shadow: var(--shadow); aspect-ratio: 4/3; object-fit: cover; }
.feature-copy h2, .article-feature h2, .desktop-two-col h2, .index-visual h2 { margin: 0; color: var(--deep); font-size: clamp(2rem,4vw,3.2rem); line-height: 1.15; letter-spacing: -.035em; }
.feature-copy p, .article-feature p, .desktop-two-col p, .index-visual p { color: var(--muted); }
.check-list { list-style: none; padding: 0; margin: 26px 0; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 30px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; width: 20px; height: 20px; border-radius: 50%; background: rgba(232,93,117,.12); color: var(--brand-strong); display: grid; place-items: center; font-size: .78rem; font-weight: 900; }

.article-list { border-top: 1px solid var(--line); }
.article-row { display: grid; grid-template-columns: minmax(210px,.8fr) minmax(0,1.4fr) auto; gap: 28px; align-items: start; padding: 24px 0; border-bottom: 1px solid var(--line); }
.article-row h3 { font-size: 1.05rem; }
.article-row p { margin: 0; }
.read-time { color: var(--muted); font-size: .84rem; white-space: nowrap; }

.deep-cta, .deep-band { background: var(--deep); color: white; }
.deep-cta-inner { min-height: 300px; padding-block: 58px; display: flex; justify-content: space-between; align-items: center; gap: 40px; }
.deep-cta h2 { margin: 0; max-width: 18ch; font-size: clamp(2.1rem,4vw,3.8rem); letter-spacing: -.04em; line-height: 1.08; }
.deep-cta p { max-width: 64ch; color: rgba(255,255,255,.72); }
.deep-cta .eyebrow, .deep-band .eyebrow { color: #ffc6d1; }

.breadcrumb ol { margin: 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 7px; font-size: .86rem; color: var(--muted); }
.breadcrumb li:not(:last-child)::after { content: "/"; margin-left: 7px; color: rgba(117,106,115,.5); }
.breadcrumb a { text-decoration: none; }

.page-hero { padding-block: 42px 74px; display: grid; grid-template-columns: minmax(0,1fr) minmax(360px,.82fr); gap: 54px; align-items: center; }
.page-hero h1, .desktop-intro h1, .page-title-block h1 { font-size: clamp(2.6rem,5.3vw,4.8rem); }
.page-hero figure { margin: 0; }
.page-hero figure img { border-radius: var(--radius-xl); aspect-ratio: 4/3; object-fit: cover; box-shadow: var(--shadow); }

.watch-layout { display: grid; grid-template-columns: minmax(0,1.35fr) minmax(280px,.65fr); gap: 42px; align-items: start; }
.watch-flow { display: grid; gap: 12px; }
.watch-flow article { display: grid; grid-template-columns: 52px 1fr; gap: 16px; padding: 22px; border: 1px solid var(--line); border-radius: var(--radius-md); background: rgba(255,255,255,.58); }
.watch-flow article > span { width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; background: var(--soft); color: var(--brand-strong); font-weight: 900; }
.watch-flow h3 { margin: 0 0 6px; }
.watch-flow p { margin: 0; color: var(--muted); }
.watch-aside { position: sticky; top: 100px; padding: 18px; background: white; border-radius: var(--radius-lg); box-shadow: var(--shadow-soft); }
.watch-aside img { border-radius: 18px; aspect-ratio: 3/4; object-fit: cover; }
.watch-aside h2 { font-size: 1.35rem; margin: 18px 0 6px; }
.watch-aside p { color: var(--muted); margin: 0; }

.scenario-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; }
.scenario-card { min-height: 230px; padding: 24px; border-radius: var(--radius-lg); border: 1px solid rgba(47,37,48,.08); background: white; text-decoration: none; transition: transform .18s ease, box-shadow .18s ease; }
.scenario-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-soft); }
.scenario-card > span { color: var(--brand-strong); font-size: .78rem; font-weight: 850; }
.scenario-card p { color: var(--muted); }

.article-feature { display: grid; grid-template-columns: minmax(0,.85fr) minmax(0,1.15fr); gap: 54px; align-items: center; }
.article-feature figure { margin: 0; }
.article-feature img { border-radius: var(--radius-xl); aspect-ratio: 4/3; object-fit: cover; }
.inline-links { display: flex; flex-wrap: wrap; gap: 12px 22px; margin-top: 22px; }
.inline-links a { color: var(--brand-strong); font-weight: 850; }

.faq-list { display: grid; gap: 12px; }
.faq-list details { background: white; border: 1px solid var(--line); border-radius: var(--radius-md); padding: 0 20px; }
.faq-list summary { cursor: pointer; list-style: none; font-weight: 850; padding: 20px 34px 20px 0; position: relative; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 0; top: 14px; width: 28px; height: 28px; border-radius: 50%; background: var(--soft); display: grid; place-items: center; color: var(--brand-strong); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { color: var(--muted); margin: 0; padding: 0 0 22px; }

.desktop-hero { padding-block: 48px 78px; display: grid; grid-template-columns: minmax(0,1.2fr) minmax(320px,.8fr); gap: 50px; align-items: center; }
.desktop-screen { padding: 14px; border-radius: 28px; background: #17131a; box-shadow: 0 32px 80px rgba(47,37,48,.22); }
.screen-bar { height: 42px; display: flex; align-items: center; gap: 7px; padding-inline: 5px; color: rgba(255,255,255,.62); }
.screen-bar span { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,.35); }
.screen-bar b { margin-left: 10px; font-size: .72rem; font-weight: 700; }
.desktop-screen img { border-radius: 16px; aspect-ratio: 16/10; object-fit: cover; }
.step-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.step-card { padding: 26px; background: white; border: 1px solid var(--line); border-radius: var(--radius-lg); }
.step-card > span { font-size: 2rem; font-weight: 900; color: rgba(232,93,117,.25); }
.desktop-two-col { padding-block: 72px; display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.desktop-two-col img { border-radius: var(--radius-xl); aspect-ratio: 4/3; object-fit: cover; }
.deep-band p { color: rgba(255,255,255,.72); }
.keyboard-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.keyboard-grid article { padding: 28px; border-top: 3px solid var(--brand); background: white; box-shadow: var(--shadow-soft); border-radius: 0 0 var(--radius-lg) var(--radius-lg); }
kbd { display: inline-flex; min-width: 34px; justify-content: center; padding: 5px 8px; border: 1px solid var(--line-strong); border-bottom-width: 3px; border-radius: 8px; background: var(--paper); font-weight: 800; color: var(--deep); }
.keyboard-grid h3 { margin-bottom: 6px; }
.keyboard-grid p { color: var(--muted); }

.page-title-block { padding-block: 48px 42px; max-width: 920px; margin-left: max(20px, calc((100% - min(1180px, calc(100% - 40px))) / 2)); }
.page-title-block p:last-child { color: var(--muted); font-size: 1.08rem; max-width: 70ch; }
.anchor-nav { display: flex; flex-wrap: wrap; gap: 10px; padding-bottom: 24px; }
.anchor-nav a { padding: 8px 12px; background: white; border: 1px solid var(--line); border-radius: 999px; text-decoration: none; font-size: .86rem; font-weight: 750; }
.anchor-nav a:hover { border-color: rgba(217,63,99,.35); color: var(--brand-strong); }
.status-overview { display: grid; grid-template-columns: repeat(2,1fr); gap: 16px; padding-top: 30px; }
.status-card { padding: 24px; display: grid; grid-template-columns: 46px 1fr; gap: 16px; background: var(--soft); border-radius: var(--radius-lg); }
.status-card h2 { margin: 0 0 4px; font-size: 1.2rem; }
.status-card p { margin: 0; color: var(--muted); }
.status-icon { width: 46px; height: 46px; border-radius: 16px; background: white; position: relative; }
.status-icon::after { content: ""; position: absolute; inset: 12px; border-radius: 6px; border: 3px solid var(--brand); }
.status-icon.live::after { border-radius: 50%; border-right-color: transparent; }
.status-icon.done::after { border: 0; border-left: 3px solid var(--brand); border-bottom: 3px solid var(--brand); transform: rotate(-45deg) scale(.8); top: 8px; left: 11px; }
.status-icon.vertical::after { inset: 9px 14px; }
.status-icon.ai::after { border-radius: 50%; box-shadow: inset 8px 0 0 rgba(242,166,90,.5); }
.guide-group { padding-block: 20px 34px; scroll-margin-top: 100px; }
.guide-group-title { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 16px; }
.guide-group-title h2 { margin: 0; font-size: 1.55rem; color: var(--deep); }
.guide-group-title span { color: var(--muted); font-size: .84rem; }
.guide-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 16px; }
.guide-card { padding: 26px; background: white; border: 1px solid var(--line); border-radius: var(--radius-lg); }
.guide-card-top { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font-size: .78rem; }
.guide-card h3 { font-size: 1.28rem; }
.guide-card > p { margin-bottom: 20px; }
.guide-card details { border-top: 1px solid var(--line); padding-top: 14px; }
.guide-card summary { cursor: pointer; color: var(--brand-strong); font-weight: 850; }
.details-copy p { color: var(--ink); }
.index-visual { display: grid; grid-template-columns: 1fr .8fr; gap: 50px; align-items: center; }
.index-visual img { border-radius: var(--radius-xl); aspect-ratio: 4/3; object-fit: cover; }

.not-found { min-height: 70vh; display: grid; grid-template-columns: 1fr .8fr; gap: 50px; align-items: center; padding-block: 70px; }
.not-found img { border-radius: var(--radius-xl); }
.not-found-copy p:not(.eyebrow) { color: var(--muted); max-width: 58ch; }

.site-footer { background: #241D25; color: rgba(255,255,255,.78); padding-top: 64px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .7fr 1fr; gap: 54px; padding-bottom: 44px; }
.footer-grid > div:not(.footer-about) { display: grid; align-content: start; gap: 8px; }
.footer-grid h2 { margin: 0 0 10px; color: white; font-size: 1rem; }
.footer-grid a { color: rgba(255,255,255,.8); text-decoration: none; }
.footer-grid a:hover { color: white; }
.footer-brand { color: white !important; font-size: 1.5rem; font-weight: 900; }
.footer-about p { max-width: 45ch; color: rgba(255,255,255,.62); }
.footer-bottom { min-height: 70px; border-top: 1px solid rgba(255,255,255,.1); display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: .84rem; }
.footer-bottom a { color: white; }

:focus-visible { outline: 3px solid rgba(217,63,99,.5); outline-offset: 3px; }
@media (max-width: 1050px) {
  .hero, .page-hero, .desktop-hero { grid-template-columns: 1fr 420px; gap: 34px; }
  .hero h1 { font-size: clamp(2.6rem,6vw,4.2rem); }
  .topic-card { grid-column: span 6; }
  .topic-card-wide { grid-column: 1 / -1; }
  .scenario-grid, .step-grid { grid-template-columns: repeat(2,1fr); }
  .feature-split, .article-feature, .desktop-two-col, .index-visual { gap: 36px; }
}
@media (max-width: 840px) {
  :root { --shell: min(100% - 28px, 720px); }
  .section { padding-block: 66px; }
  .brand-word small { display: none; }
  .menu-button { display: inline-flex; }
  .site-nav { position: fixed; left: 14px; right: 14px; top: 84px; display: grid; gap: 6px; padding: 14px; background: var(--paper); border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); transform: translateY(-10px); opacity: 0; visibility: hidden; transition: opacity .18s ease, transform .18s ease, visibility .18s ease; }
  .site-nav.is-open { opacity: 1; visibility: visible; transform: translateY(0); }
  .nav-link { justify-content: flex-start; }
  .hero, .page-hero, .desktop-hero { grid-template-columns: 1fr; }
  .hero { padding-top: 42px; }
  .hero-copy { max-width: none; }
  .hero h1 { max-width: 14ch; }
  .hero-visual { max-width: 620px; }
  .hero-facts { grid-template-columns: 1fr; gap: 0; }
  .split-head { grid-template-columns: 1fr; gap: 18px; }
  .path-grid { grid-template-columns: 1fr; }
  .article-row { grid-template-columns: 1fr; gap: 6px; }
  .feature-split, .feature-split.reverse, .article-feature, .desktop-two-col, .index-visual, .watch-layout, .not-found { grid-template-columns: 1fr; }
  .watch-aside { position: static; }
  .deep-cta-inner { align-items: flex-start; flex-direction: column; }
  .keyboard-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-about { grid-column: 1 / -1; }
}
@media (max-width: 620px) {
  :root { --shell: calc(100% - 24px); --radius-xl: 24px; --radius-lg: 20px; }
  .header-inner { min-height: 68px; }
  .brand img { width: 38px; height: 38px; }
  .hero { padding-block: 34px 54px; gap: 30px; }
  .hero h1, .page-hero h1, .desktop-intro h1, .page-title-block h1 { font-size: clamp(2.2rem,11vw,3.2rem); }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .button { width: 100%; }
  .topic-grid { grid-template-columns: 1fr; }
  .topic-card, .topic-card-wide { grid-column: auto; }
  .topic-card-wide { grid-template-columns: 1fr; }
  .scenario-grid, .step-grid, .status-overview, .guide-grid { grid-template-columns: 1fr; }
  .scenario-card { min-height: 0; }
  .ribbon-inner { gap: 14px; min-height: 54px; }
  .page-hero { padding-top: 30px; }
  .watch-flow article { grid-template-columns: 42px 1fr; padding: 18px; }
  .watch-flow article > span { width: 36px; height: 36px; }
  .desktop-screen { padding: 9px; }
  .screen-bar { height: 34px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-about { grid-column: auto; }
  .footer-bottom { align-items: flex-start; flex-direction: column; justify-content: center; padding-block: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

/* Progressive enhancement: if the head script is unavailable, keep mobile navigation visible and usable. */
@media (max-width: 840px) {
  html:not([data-client-js="ready"]) .menu-button { display: none; }
  html:not([data-client-js="ready"]) .site-nav {
    position: static;
    display: flex;
    flex-wrap: wrap;
    flex-basis: 100%;
    opacity: 1;
    visibility: visible;
    transform: none;
    padding: 0 0 12px;
    border: 0;
    box-shadow: none;
    background: transparent;
  }
  html:not([data-client-js="ready"]) .header-inner { flex-wrap: wrap; }
}