:root {
  --ink: #071b3a;
  --navy: #0d2b55;
  --red: #c4161c;
  --red-dark: #9f0f14;
  --muted: #5f6e82;
  --line: #dbe2ea;
  --soft: #f5f7fa;
  --white: #fff;
  --max: 1180px;
  --shadow: 0 18px 50px rgba(7, 27, 58, .08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea { font: inherit; }
button { cursor: pointer; }
.container { width: min(calc(100% - 40px), var(--max)); margin: 0 auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; background: var(--ink); color: #fff; padding: 10px 14px; }
.skip-link:focus { top: 12px; }

.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.97); border-bottom: 1px solid var(--line); }
.nav-wrap { min-height: 72px; display: flex; align-items: center; gap: 28px; }
.brand { display: flex; flex-direction: column; line-height: 1.15; white-space: nowrap; }
.brand strong { font-size: 17px; letter-spacing: .02em; }
.brand span { margin-top: 5px; color: var(--muted); font-size: 12px; }
.main-nav { margin-left: auto; display: flex; align-items: center; gap: 25px; }
.main-nav a { position: relative; padding: 25px 0 22px; color: #26364b; font-size: 14px; }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--ink); }
.main-nav a[aria-current="page"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 3px; background: var(--red); }
.nav-contact { border: 1px solid var(--ink); padding: 8px 14px !important; }
.nav-contact::after { display: none; }
.nav-toggle { display: none; margin-left: auto; border: 1px solid var(--line); background: #fff; width: 42px; height: 42px; color: var(--ink); }
.home-header { position: relative; }
.home-header .nav-wrap { min-height: 66px; }
.home-brand strong { font-size: 16px; }
.home-brand-lockup { flex-direction: row; align-items: center; gap: 14px; }
.header-lenovo-logo { width: 112px; height: 37px; object-fit: cover; }

.hero { border-bottom: 1px solid var(--line); overflow: hidden; }
.hero-grid { min-height: 590px; display: grid; grid-template-columns: 1.12fr .88fr; align-items: stretch; }
.hero-copy { padding: 82px 70px 76px 0; display: flex; flex-direction: column; justify-content: center; }
.kicker { color: var(--red); font-size: 14px; font-weight: 700; letter-spacing: .08em; }
h1, h2, h3 { margin: 0; line-height: 1.22; letter-spacing: -.02em; }
h1 { margin-top: 18px; max-width: 760px; font-size: clamp(42px, 5vw, 68px); }
.hero-lead { max-width: 700px; margin: 24px 0 0; color: #33455c; font-size: 19px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.btn { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; border: 1px solid var(--ink); padding: 11px 20px; font-weight: 700; transition: .18s ease; }
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(7,27,58,.12); }
.btn-primary { border-color: var(--red); background: var(--red); color: #fff; }
.btn-primary:hover { background: var(--red-dark); }
.btn-secondary { background: #fff; color: var(--ink); }
.btn:disabled, .btn[aria-disabled="true"] { cursor: not-allowed; opacity: .58; transform: none; box-shadow: none; }
.hero-note { margin-top: 27px; color: var(--muted); font-size: 13px; }
.hero-portrait { position: relative; min-height: 590px; background: var(--soft); }
.hero-portrait::before { content: ""; position: absolute; inset: 0 0 auto; height: 8px; background: var(--red); }
.hero-portrait img { width: 100%; height: 100%; object-fit: cover; object-position: center 18%; }
.portrait-caption { position: absolute; right: 20px; bottom: 20px; left: 20px; padding: 14px 16px; background: rgba(255,255,255,.94); border-left: 4px solid var(--red); font-size: 13px; }
.home-hero .hero-grid { min-height: 455px; grid-template-columns: 1fr; }
.home-hero .hero-copy { max-width: 900px; padding: 82px 0 76px; }
.home-hero h1 { max-width: none; margin-top: 0; }

.page-hero { padding: 76px 0 58px; border-bottom: 1px solid var(--line); background: linear-gradient(90deg, #fff 0%, #fff 68%, #f7f8fa 68%, #f7f8fa 100%); }
.page-hero .kicker { margin-bottom: 15px; }
.page-hero h1 { max-width: 930px; margin: 0; font-size: clamp(38px, 5vw, 60px); }
.page-hero p { max-width: 760px; margin: 22px 0 0; color: #3e4f64; font-size: 18px; }
.source-line { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 20px; color: var(--muted); font-size: 13px; }

.section { padding: 82px 0; }
.section-soft { background: var(--soft); }
.section-dark { background: var(--ink); color: #fff; }
.section-head { display: grid; grid-template-columns: .75fr 1.25fr; gap: 52px; align-items: end; margin-bottom: 38px; }
.section-head h2 { font-size: clamp(30px, 4vw, 48px); }
.section-head p { margin: 0; color: var(--muted); font-size: 17px; }
.section-dark .section-head p { color: #bdc9d8; }
.section-rule { width: 54px; height: 4px; margin: 15px 0 0; background: var(--red); }
.section-head.is-simple { grid-template-columns: 1fr; }

.problem-list { border-top: 1px solid var(--line); }
.problem-row { display: grid; grid-template-columns: 72px 1fr 1.2fr 30px; gap: 24px; align-items: center; min-height: 118px; border-bottom: 1px solid var(--line); }
.problem-no { color: var(--red); font-size: 14px; font-weight: 800; }
.problem-row h3 { font-size: 21px; }
.problem-row p { margin: 0; color: var(--muted); }
.arrow { font-size: 26px; color: var(--red); }

.process { display: grid; grid-template-columns: repeat(5, 1fr); border: 1px solid #314866; }
.process-step { position: relative; min-height: 190px; padding: 28px 24px; border-right: 1px solid #314866; }
.process-step:last-child { border-right: 0; }
.process-step .num { color: #ee5b60; font-weight: 800; }
.process-step h3 { margin-top: 24px; font-size: 19px; }
.process-step p { margin: 10px 0 0; color: #bdc9d8; font-size: 14px; }
.owner { display: inline-block; margin-top: 18px; padding-top: 8px; border-top: 2px solid var(--red); color: #fff; font-size: 12px; }

.gateway-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.gateway { min-height: 285px; padding: 34px; border: 1px solid var(--line); background: #fff; transition: .18s ease; }
.gateway:hover { border-color: #9aa9ba; box-shadow: var(--shadow); transform: translateY(-3px); }
.gateway .meta { display: flex; justify-content: space-between; gap: 16px; color: var(--muted); font-size: 13px; }
.gateway h3 { margin-top: 34px; font-size: 28px; }
.gateway p { margin: 14px 0 0; color: var(--muted); }
.gateway ul { margin: 18px 0 0; padding-left: 20px; color: #34465b; }
.gateway .text-link { display: inline-block; margin-top: 24px; color: var(--red); font-weight: 700; }
.product-gateway { padding: 0; overflow: hidden; }
.product-media { height: 230px; overflow: hidden; border-bottom: 1px solid var(--line); background: #edf1f5; }
.product-media img { width: 100%; height: 100%; object-fit: cover; }
.product-media.is-contain { background: #fff; }
.product-media.is-contain img { object-fit: contain; padding: 18px; }
.product-body { padding: 30px 32px 34px; }
.product-body h3 { margin-top: 0; }
.product-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.product-tag { padding: 5px 9px; border: 1px solid #cbd5e1; color: #405168; background: #f8fafc; font-size: 12px; }
.product-showcase { display: grid; grid-template-columns: .95fr 1.05fr; border: 1px solid var(--line); background: #fff; }
.showcase-media { min-height: 470px; background: #edf1f5; overflow: hidden; }
.showcase-media img { width: 100%; height: 100%; min-height: 470px; object-fit: cover; }
.showcase-media.is-contain { background: #fff; }
.showcase-media.is-contain img { object-fit: contain; padding: 34px; }
.showcase-copy { padding: 46px; align-self: center; }
.showcase-copy h2 { margin-top: 10px; font-size: clamp(32px, 4vw, 48px); }
.showcase-copy > p { color: var(--muted); font-size: 17px; }
.showcase-list { display: grid; gap: 0; margin-top: 24px; border-top: 1px solid var(--line); }
.showcase-list div { display: grid; grid-template-columns: 120px 1fr; gap: 20px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.showcase-list strong { color: var(--ink); }
.showcase-list span { color: var(--muted); }
.scenario-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.scenario-card { min-height: 220px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; }
.scenario-card .label { color: var(--red); font-size: 12px; font-weight: 800; }
.scenario-card h3 { margin-top: 18px; font-size: 22px; }
.scenario-card p { margin-bottom: 0; color: var(--muted); }
.photo-duo { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.product-photo { margin: 0; border: 1px solid var(--line); background: #fff; overflow: hidden; }
.product-photo img { width: 100%; height: 380px; object-fit: cover; }
.product-photo figcaption { padding: 16px 18px; color: var(--muted); font-size: 13px; }

.trust-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.trust-panel { padding: 34px; border-top: 4px solid var(--red); background: #fff; box-shadow: var(--shadow); }
.trust-panel h3 { font-size: 24px; }
.trust-panel p { color: var(--muted); }
.plain-list { margin: 18px 0 0; padding: 0; list-style: none; }
.plain-list li { padding: 11px 0; border-bottom: 1px solid var(--line); }
.plain-list li:last-child { border-bottom: 0; }

.decision-table { width: 100%; border-collapse: collapse; border-top: 3px solid var(--ink); }
.decision-table th, .decision-table td { padding: 18px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
.decision-table th { background: var(--soft); font-size: 13px; color: #46576c; }
.decision-table td:first-child { font-weight: 800; color: var(--ink); }
.decision-table td { color: #43536a; }

.compare-grid { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); }
.compare-card { padding: 30px; border-right: 1px solid var(--line); }
.compare-card:last-child { border-right: 0; }
.compare-card .label { color: var(--red); font-weight: 800; font-size: 13px; }
.compare-card h3 { margin-top: 16px; font-size: 24px; }
.compare-card p { color: var(--muted); }
.compare-card ul { padding-left: 18px; color: #34465b; }

.checklist { counter-reset: item; display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.check-item { position: relative; min-height: 150px; padding: 28px 30px 28px 78px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.check-item::before { counter-increment: item; content: counter(item, decimal-leading-zero); position: absolute; left: 28px; top: 30px; color: var(--red); font-weight: 800; }
.check-item h3 { font-size: 19px; }
.check-item p { margin: 9px 0 0; color: var(--muted); }

.article-tools { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 24px; }
.filter-btn { border: 1px solid var(--line); background: #fff; padding: 9px 14px; color: #35465b; }
.filter-btn[aria-pressed="true"] { border-color: var(--ink); background: var(--ink); color: #fff; }
.article-layout { display: grid; grid-template-columns: 1fr 330px; gap: 28px; align-items: start; }
.article-list { border-top: 2px solid var(--ink); }
.article-card { display: block; padding: 30px 0; border-bottom: 1px solid var(--line); }
.article-card[hidden] { display: none; }
.article-card .article-meta { display: flex; flex-wrap: wrap; gap: 18px; color: var(--muted); font-size: 12px; }
.article-card h2 { margin-top: 12px; font-size: 27px; }
.article-card p { margin: 12px 0 0; color: var(--muted); }
.article-card .status { color: var(--red); font-weight: 700; }
.side-cta { position: sticky; top: 98px; padding: 28px; border: 1px solid var(--line); background: var(--soft); }
.side-cta h2 { font-size: 25px; }
.side-cta p { color: var(--muted); }

.article-hero { padding: 68px 0 46px; border-bottom: 1px solid var(--line); background: #fff; }
.article-hero .breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; color: var(--muted); font-size: 13px; }
.article-hero .breadcrumb a { color: #174e94; }
.article-hero h1 { max-width: 980px; margin: 0; font-size: clamp(36px, 5vw, 58px); }
.article-deck { max-width: 820px; margin: 22px 0 0; color: #425269; font-size: 19px; }
.article-byline { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 24px; color: var(--muted); font-size: 13px; }
.article-shell { display: grid; grid-template-columns: minmax(0, 780px) 280px; gap: 56px; align-items: start; }
.article-prose { font-size: 18px; line-height: 1.95; }
.article-prose .lead { margin-top: 0; color: var(--ink); font-size: 23px; line-height: 1.65; font-weight: 700; }
.article-prose p { margin: 0 0 24px; }
.article-prose strong { color: var(--red-dark); }
.article-conclusion { margin: 34px 0; padding: 26px 28px; border-left: 5px solid var(--red); background: var(--soft); }
.article-conclusion strong { display: block; margin-bottom: 8px; color: var(--ink); font-size: 20px; }
.article-aside { position: sticky; top: 98px; display: grid; gap: 18px; }
.author-box, .article-source-box { padding: 24px; border: 1px solid var(--line); background: #fff; }
.author-box { position: relative; overflow: hidden; border-top: 4px solid var(--red); background: linear-gradient(145deg, #fff 0%, #f7f9fc 100%); }
.author-box::after { position: absolute; right: -34px; bottom: -42px; width: 110px; height: 110px; border: 18px solid rgba(218, 28, 35, .06); border-radius: 50%; content: ""; }
.author-label { display: block; margin-bottom: 18px; color: var(--red); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.author-profile { position: relative; z-index: 1; display: flex; gap: 14px; align-items: center; }
.author-avatar { width: 58px; height: 58px; flex: 0 0 58px; border: 2px solid #fff; border-radius: 50%; object-fit: cover; object-position: center 18%; box-shadow: 0 4px 14px rgba(8, 29, 57, .16); }
.author-name h2 { margin: 0 0 4px; font-size: 22px; line-height: 1.1; }
.author-name span { color: var(--muted); font-size: 13px; }
.author-role { position: relative; z-index: 1; margin: 18px 0 0; padding-top: 14px; border-top: 1px solid var(--line); color: var(--ink); font-size: 15px; font-weight: 750; }
.author-focus { position: relative; z-index: 1; margin: 7px 0 0; color: var(--muted); font-size: 13px; line-height: 1.75; }
.article-source-box h2 { font-size: 20px; }
.article-source-box p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
.article-source-box a { display: block; margin-top: 12px; color: #174e94; font-size: 14px; text-decoration: underline; text-underline-offset: 3px; }
.related-articles { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.related-article { min-height: 170px; padding: 24px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.related-article span { color: var(--red); font-size: 12px; font-weight: 800; }
.related-article h3 { margin-top: 15px; font-size: 20px; }

.profile-grid { display: grid; grid-template-columns: 380px 1fr; gap: 56px; align-items: start; }
.profile-photo { border-top: 8px solid var(--red); background: var(--soft); }
.profile-photo img { width: 100%; aspect-ratio: 4/5; object-fit: cover; object-position: center 15%; }
.profile-copy h2 { font-size: 42px; }
.profile-copy p { color: #3e4f64; font-size: 17px; }
.fact-list { margin-top: 28px; border-top: 1px solid var(--line); }
.fact { display: grid; grid-template-columns: 150px 1fr; gap: 24px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.fact dt { color: var(--muted); }
.fact dd { margin: 0; font-weight: 700; }
.pending { color: #8b5a00; }

.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 42px; }
.contact-card { padding: 32px; border: 1px solid var(--line); background: #fff; }
.contact-card h2 { font-size: 30px; }
.contact-card p { color: var(--muted); }
.contact-method { padding: 18px 0; border-bottom: 1px solid var(--line); }
.contact-method:last-child { border-bottom: 0; }
.contact-method strong { display: block; }
.contact-method span { color: var(--muted); }
.template-box { min-height: 420px; width: 100%; resize: vertical; border: 1px solid #b9c4d1; padding: 18px; color: #26374b; background: #fbfcfd; }
.copy-state { min-height: 24px; margin-top: 12px; color: #237247; font-weight: 700; }
.wechat-card { text-align: center; }
.wechat-card h2 { margin-top: 10px; }
.wechat-qr { width: min(300px, 100%); height: auto; margin: 22px auto 16px; border: 1px solid var(--line); }
.contact-email-row { display: flex; gap: 10px; align-items: center; justify-content: center; margin-top: 8px; }
.contact-email { display: inline-block; color: #174e94; font-weight: 700; text-decoration: underline; text-underline-offset: 3px; }
.email-copy-button { min-width: 58px; padding: 7px 13px; border: 1px solid #9eabba; color: var(--ink); background: #fff; font: inherit; font-size: 13px; font-weight: 750; cursor: pointer; transition: border-color .18s ease, color .18s ease, background .18s ease; }
.email-copy-button:hover, .email-copy-button:focus-visible { border-color: var(--red); color: var(--red); background: #fff7f7; outline: none; }
.email-copy-status { display: block; min-height: 20px; margin-top: 6px; color: #237247; font-size: 13px; font-weight: 700; }
.contact-address { margin: 18px 0 0; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); }
.request-form { display: grid; gap: 24px; }
.request-form fieldset { margin: 0; padding: 0; border: 0; }
.request-form legend, .form-label { display: block; margin-bottom: 10px; color: var(--ink); font-weight: 800; }
.choice-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.choice-option { position: relative; display: flex; min-height: 48px; align-items: center; gap: 10px; border: 1px solid var(--line); padding: 11px 14px; background: #fff; }
.choice-option:has(input:checked) { border-color: var(--red); background: #fff7f7; }
.choice-option input { accent-color: var(--red); }
.form-input { width: 100%; border: 1px solid #b9c4d1; padding: 12px 14px; color: var(--ink); background: #fff; }
.form-input:focus, .choice-option:focus-within { outline: 2px solid rgba(196,22,28,.18); outline-offset: 1px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-hint { margin: -12px 0 0; color: var(--muted); font-size: 13px; }
.submit-state { min-height: 24px; color: #237247; font-weight: 700; }
.submit-state[data-state="error"] { color: var(--red); }
.submit-state[data-state="working"] { color: var(--muted); }
.request-form button[type="submit"]:disabled { cursor: wait; opacity: .68; }
.form-trap { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

.source-box { padding: 26px; border-left: 4px solid var(--red); background: var(--soft); }
.source-box h3 { font-size: 20px; }
.source-box ul { margin-bottom: 0; padding-left: 20px; }
.source-box a { color: #174e94; text-decoration: underline; text-underline-offset: 3px; }
.notice { padding: 22px 24px; border: 1px solid #e3c884; background: #fffaf0; color: #664900; }

.cta-band { padding: 58px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--soft); }
.cta-band .container { display: flex; justify-content: space-between; align-items: center; gap: 32px; }
.cta-band h2 { font-size: clamp(30px, 4vw, 46px); }
.cta-band p { margin: 10px 0 0; color: var(--muted); }

.site-footer { padding: 46px 0 30px; background: #06162f; color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 40px; }
.site-footer h2 { font-size: 23px; }
.site-footer p, .site-footer a { color: #b8c5d5; }
.footer-links { display: grid; gap: 9px; }
.legal { margin-top: 34px; padding-top: 22px; border-top: 1px solid #2b405f; color: #93a4b8; font-size: 12px; }
.footer-identity { display: flex; align-items: center; gap: 18px; }
.footer-identity h2 { margin: 0; }
.footer-identity p { margin: 7px 0 0; }
.footer-identity .footer-address { margin-top: 10px; color: #91a0b3; font-size: 12px; line-height: 1.65; }
.footer-lenovo-logo { width: 116px; height: 39px; flex: 0 0 116px; object-fit: cover; }
.footer-avatar { width: 72px; height: 72px; flex: 0 0 72px; border-radius: 50%; object-fit: cover; object-position: center 15%; border: 2px solid #fff; }
.cta-band-minimal .container { justify-content: center; }

/* AI host page — local AI growth path */
.ai-local-hero { padding: 62px 0 54px; border-bottom: 1px solid var(--line); background: #fff; }
.ai-local-hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; gap: 64px; align-items: center; }
.ai-local-breadcrumb { margin-bottom: 48px; color: var(--muted); font-size: 13px; }
.ai-local-breadcrumb a { color: inherit; }
.ai-local-hero h1 { max-width: 700px; margin: 0; font-size: clamp(44px, 5vw, 70px); line-height: 1.18; letter-spacing: -.045em; }
.ai-local-hero-copy > p { max-width: 690px; margin: 24px 0 0; color: #3d4e64; font-size: 17px; line-height: 1.9; }
.ai-local-features { display: flex; gap: 0; margin-top: 38px; padding-top: 22px; border-top: 3px solid var(--red); }
.ai-local-features span { padding: 0 22px; border-right: 1px solid var(--line); color: var(--ink); font-size: 14px; white-space: nowrap; }
.ai-local-features span:first-child { padding-left: 0; }
.ai-local-features span:last-child { border-right: 0; }
.ai-local-hero-media { display: grid; min-height: 440px; place-items: center; background: #f3f4f6; }
.ai-local-hero-media img { width: 86%; height: 380px; object-fit: contain; mix-blend-mode: multiply; }
.ai-local-section { padding: 70px 0; border-bottom: 1px solid var(--line); }
.ai-local-section-soft { background: #f7f8fa; }
.ai-local-heading { margin-bottom: 34px; }
.ai-local-heading h2 { position: relative; margin: 0; padding-left: 18px; font-size: clamp(28px, 3.2vw, 40px); line-height: 1.2; }
.ai-local-heading h2::before { position: absolute; top: .12em; bottom: .12em; left: 0; width: 5px; background: var(--red); content: ""; }
.ai-local-heading p { margin: 12px 0 0 18px; color: var(--muted); }
.ai-scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.ai-scene { padding: 38px 34px; text-align: center; }
.ai-scene + .ai-scene { border-left: 1px solid var(--line); }
.ai-line-icon { display: grid; width: 62px; height: 62px; margin: 0 auto 22px; place-items: center; color: #071d49; }
.ai-line-icon svg { width: 58px; height: 58px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.ai-scene h3 { font-size: 21px; }
.ai-scene p { margin: 12px auto 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.ai-scale-grid { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); }
.ai-scale-card + .ai-scale-card { border-left: 1px solid #fff; }
.ai-scale-label { padding: 12px 18px; background: #071d49; color: #fff; font-size: 15px; font-weight: 800; text-align: center; }
.ai-scale-media { display: grid; height: 200px; place-items: center; background: #f1f2f4; }
.ai-scale-media img { width: 82%; height: 160px; object-fit: contain; mix-blend-mode: multiply; }
.ai-scale-cluster { display: flex; width: 88%; gap: 4px; align-items: center; justify-content: center; }
.ai-scale-cluster img { width: 32%; height: 120px; object-fit: contain; }
.ai-scale-copy { min-height: 158px; padding: 24px 26px 28px; background: #f7f8fa; }
.ai-scale-copy h3 { font-size: 21px; }
.ai-scale-copy p { margin: 10px 0 0; color: var(--muted); font-size: 14px; line-height: 1.75; }
.ai-upgrade-flow { display: flex; gap: 42px; align-items: flex-start; }
.ai-upgrade-step { position: relative; flex: 1; min-width: 0; text-align: center; }
.ai-upgrade-step:not(:last-child)::after { position: absolute; top: 42px; right: -34px; width: 26px; height: 10px; border-top: 2px solid #071d49; content: ""; }
.ai-upgrade-step:not(:last-child)::before { position: absolute; z-index: 1; top: 37px; right: -34px; width: 10px; height: 10px; border-top: 2px solid #071d49; border-right: 2px solid #071d49; transform: rotate(45deg); content: ""; }
.ai-upgrade-icon { display: grid; width: 96px; height: 84px; margin: 0 auto 16px; border: 1px solid var(--line); place-items: center; color: #071d49; background: #fff; }
.ai-upgrade-icon svg { width: 54px; height: 54px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.ai-upgrade-step strong { display: block; font-size: 16px; }
.ai-upgrade-step span { display: block; margin-top: 7px; color: var(--muted); font-size: 13px; line-height: 1.6; }
.ai-support-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.ai-support-item { display: grid; grid-template-columns: 64px 1fr; gap: 18px; padding: 20px 26px; align-items: start; }
.ai-support-item + .ai-support-item { border-left: 1px solid var(--line); }
.ai-support-item .ai-line-icon { width: 56px; height: 56px; margin: 0; }
.ai-support-item .ai-line-icon svg { width: 52px; height: 52px; }
.ai-support-item h3 { margin-top: 4px; font-size: 18px; }
.ai-support-item p { margin: 8px 0 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.ai-local-consult { padding: 60px 0; background: #fff; }
.ai-local-consult-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 54px; align-items: center; }
.ai-local-consult h2 { max-width: 410px; font-size: clamp(32px, 4vw, 48px); line-height: 1.18; }
.ai-local-consult p { max-width: 440px; color: var(--muted); }
.ai-local-consult .btn { margin-top: 24px; }
.ai-consult-visual { display: grid; min-height: 210px; place-items: center; background: #f1f2f4; color: #071d49; }
.ai-consult-visual svg { width: 92px; height: 92px; fill: none; stroke: currentColor; stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }

@media (max-width: 980px) {
  .nav-toggle { display: grid; place-items: center; }
  .main-nav { display: none; position: absolute; top: 72px; left: 0; right: 0; margin: 0; padding: 12px 20px 22px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 18px 35px rgba(7,27,58,.08); }
  .main-nav.open { display: grid; }
  .main-nav a { padding: 12px 0; }
  .main-nav a[aria-current="page"]::after { left: 0; right: auto; width: 32px; }
  .nav-contact { border: 0; padding: 12px 0 !important; }
  .hero-grid, .section-head, .article-layout, .article-shell, .profile-grid, .contact-grid { grid-template-columns: 1fr; }
  .hero-copy { padding: 66px 0 52px; }
  .home-hero .hero-copy { padding: 66px 0 58px; }
  .hero-portrait { min-height: 520px; }
  .process { grid-template-columns: repeat(2, 1fr); }
  .process-step { border-bottom: 1px solid #314866; }
  .gateway-grid, .trust-grid { grid-template-columns: 1fr; }
  .product-showcase { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .side-cta { position: static; }
  .article-aside { position: static; grid-template-columns: 1fr 1fr; }
  .ai-local-hero-grid { grid-template-columns: 1fr; gap: 34px; }
  .ai-local-breadcrumb { margin-bottom: 32px; }
  .ai-local-hero-media { min-height: 360px; }
  .ai-support-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-support-item:nth-child(3) { border-left: 0; }
  .ai-support-item:nth-child(n+3) { border-top: 1px solid var(--line); }
  .ai-upgrade-flow { display: grid; grid-template-columns: repeat(3, 1fr); }
  .ai-upgrade-step::before, .ai-upgrade-step::after { display: none; }
}

@media (max-width: 680px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .brand span { display: none; }
  .home-brand strong { font-size: 14px; }
  .home-brand-lockup { gap: 10px; }
  .header-lenovo-logo { width: 86px; height: 29px; }
  .hero-grid { min-height: 0; }
  .hero-copy { padding: 48px 0 40px; }
  .home-hero .hero-grid { min-height: 0; }
  .home-hero .hero-copy { padding: 54px 0 48px; }
  h1 { font-size: 40px; }
  .hero-lead { font-size: 17px; }
  .hero-portrait { min-height: 420px; }
  .section { padding: 58px 0; }
  .section-head { gap: 16px; margin-bottom: 28px; }
  .problem-row { grid-template-columns: 38px 1fr 22px; gap: 10px; padding: 22px 0; }
  .problem-row p { grid-column: 2 / 4; }
  .process { grid-template-columns: 1fr; }
  .process-step { min-height: 0; border-right: 0; }
  .gateway { padding: 26px; }
  .product-gateway { padding: 0; }
  .product-media { height: 210px; }
  .product-body { padding: 24px; }
  .showcase-media, .showcase-media img { min-height: 340px; }
  .showcase-copy { padding: 30px 24px; }
  .showcase-list div { grid-template-columns: 1fr; gap: 2px; }
  .scenario-grid, .photo-duo { grid-template-columns: 1fr; }
  .product-photo img { height: 300px; }
  .compare-grid { grid-template-columns: 1fr; }
  .compare-card { border-right: 0; border-bottom: 1px solid var(--line); }
  .compare-card:last-child { border-bottom: 0; }
  .checklist { grid-template-columns: 1fr; }
  .decision-table { display: block; overflow-x: auto; white-space: nowrap; }
  .decision-table td { white-space: normal; min-width: 190px; }
  .profile-grid { gap: 34px; }
  .profile-photo { max-width: 420px; }
  .fact { grid-template-columns: 1fr; gap: 3px; }
  .cta-band .container { align-items: flex-start; flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-identity { flex-wrap: wrap; }
  .footer-lenovo-logo { width: 92px; height: 31px; flex-basis: 92px; }
  .footer-avatar { width: 60px; height: 60px; flex-basis: 60px; }
  .source-line { display: grid; gap: 6px; }
  .article-hero { padding: 48px 0 38px; }
  .article-prose { font-size: 17px; }
  .article-prose .lead { font-size: 20px; }
  .article-aside, .related-articles { grid-template-columns: 1fr; }
  .choice-grid, .form-row { grid-template-columns: 1fr; }
  .ai-local-hero { padding: 38px 0 42px; }
  .ai-local-hero h1 { font-size: 42px; }
  .ai-local-hero-copy > p { font-size: 16px; }
  .ai-local-features { flex-wrap: wrap; row-gap: 12px; }
  .ai-local-features span { width: 50%; padding: 0 12px 0 0; border-right: 0; font-size: 13px; }
  .ai-local-hero-media { min-height: 280px; }
  .ai-local-hero-media img { height: 250px; }
  .ai-local-section { padding: 52px 0; }
  .ai-scene-grid, .ai-scale-grid, .ai-support-grid, .ai-local-consult-grid { grid-template-columns: 1fr; }
  .ai-scene + .ai-scene, .ai-scale-card + .ai-scale-card, .ai-support-item + .ai-support-item { border-top: 1px solid var(--line); border-left: 0; }
  .ai-upgrade-flow { grid-template-columns: 1fr; gap: 18px; }
  .ai-upgrade-step { display: grid; grid-template-columns: 82px 1fr; gap: 16px; text-align: left; align-items: center; }
  .ai-upgrade-icon { width: 82px; height: 72px; margin: 0; grid-row: span 2; }
  .ai-upgrade-step span { margin-top: -4px; }
  .ai-support-item:nth-child(3) { border-left: 0; }
  .ai-local-consult-grid { gap: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}