:root {
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --brand: #1677ff;
  --brand-dark: #0f68e8;
  --brand-soft: #eaf3ff;
  --ink: #17202a;
  --body: #566572;
  --muted: #72808c;
  --line: #dfe6ec;
  --surface: #fff;
  --canvas: #f7f9fb;
  --max: 1180px;
  --radius: 20px;
  --radius-lg: 30px;
  --shadow: 0 22px 60px rgba(28, 57, 82, .09);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 86px; }
body { margin: 0; background: var(--canvas); color: var(--ink); font-family: var(--font-sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { max-width: 100%; }
:where(a, button):focus-visible { outline: 3px solid rgba(22, 119, 255, .3); outline-offset: 3px; }
.site-header { position: sticky; top: 0; z-index: 30; display: flex; align-items: center; gap: 34px; min-height: 76px; padding: 10px max(24px, calc((100vw - var(--max))/2)); border-bottom: 1px solid rgba(223, 230, 236, .9); background: rgba(255, 255, 255, .95); backdrop-filter: blur(18px); }
.brand { display: flex; align-items: center; gap: 8px; margin-right: auto; }
.brand-mark { display: block; width: 54px; height: 30px; flex: 0 0 54px; }
.brand-mark svg { display: block; width: 100%; height: 100%; overflow: visible; }
.logo-bar { fill: var(--brand); }
.brand-word strong { display: block; color: var(--brand); font-size: 18px; line-height: 1; letter-spacing: .12em; }
.brand-word small { display: block; margin-top: 4px; color: var(--brand); font-size: 8px; font-weight: 650; letter-spacing: .18em; }
.main-nav { display: flex; align-items: center; gap: 24px; color: #52606c; font-size: 14px; }
.main-nav a { position: relative; padding: 10px 1px; }
.main-nav a::after { content: ""; position: absolute; right: 0; bottom: 4px; left: 0; height: 2px; border-radius: 999px; background: var(--brand); transform: scaleX(0); transform-origin: left; transition: transform .2s; }
.main-nav a:hover::after, .main-nav a[aria-current="page"]::after { transform: scaleX(1); }
.main-nav a[aria-current="page"] { color: var(--ink); font-weight: 650; }
/* Services dropdown */
.nav-dropdown { position: relative; display: inline-flex; }
.nav-dropdown-toggle { position: relative; display: inline-flex; align-items: center; gap: 7px; padding: 10px 1px; border: 0; background: none; color: inherit; font: inherit; font-size: inherit; cursor: pointer; }
.nav-dropdown-toggle::after { content: ""; width: 7px; height: 7px; border-right: 1.8px solid currentColor; border-bottom: 1.8px solid currentColor; transform: rotate(45deg) translate(-1px, -2px); transition: transform .2s; }
.nav-dropdown.open .nav-dropdown-toggle::after { transform: rotate(225deg) translate(-1px, -1px); }
.nav-dropdown-toggle::before { content: ""; position: absolute; right: 0; bottom: 4px; left: 0; height: 2px; border-radius: 999px; background: var(--brand); transform: scaleX(0); transform-origin: left; transition: transform .2s; }
.nav-dropdown.open .nav-dropdown-toggle::before { transform: scaleX(1); }
.nav-dropdown-menu { position: absolute; top: calc(100% + 10px); left: 50%; z-index: 40; display: grid; gap: 4px; min-width: 280px; padding: 9px; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: 0 22px 54px rgba(28, 57, 82, .14); opacity: 0; visibility: hidden; transform: translate(-50%, 8px); transition: opacity .2s, transform .2s, visibility .2s; }
.nav-dropdown.open .nav-dropdown-menu { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
.nav-dropdown-menu a { display: grid; gap: 3px; padding: 13px 15px; border-radius: 12px; white-space: nowrap; }
.nav-dropdown-menu a::after { display: none; }
.nav-dropdown-menu a:hover { background: var(--brand-soft); }
.nav-dropdown-menu b { color: var(--ink); font-size: 14px; font-weight: 650; }
.nav-dropdown-menu small { color: var(--muted); font-size: 11px; }
.header-cta, .btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 46px; padding: 0 20px; border: 1px solid transparent; border-radius: 999px; font-weight: 650; transition: .2s; }
.header-cta, .btn-primary { background: var(--brand); color: #fff; }
.header-cta:hover, .btn-primary:hover { background: var(--brand-dark); transform: translateY(-1px); }
.btn-secondary { border-color: var(--line); background: #fff; color: var(--ink); }
.btn-secondary:hover { border-color: rgba(22, 119, 255, .38); background: var(--brand-soft); }
.nav-toggle { display: none; width: 44px; height: 44px; border: 0; border-radius: 50%; background: var(--brand-soft); }
.nav-toggle span { display: block; width: 18px; height: 2px; margin: 4px auto; border-radius: 2px; background: var(--ink); }
.breadcrumb { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; padding-top: 26px; color: var(--muted); font-size: 13px; }
.breadcrumb a:hover { color: var(--brand); }
.service-hero { padding: clamp(56px, 8vw, 104px) 24px clamp(64px, 9vw, 112px); }
.service-hero-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(360px, .92fr); gap: clamp(48px, 8vw, 92px); align-items: center; width: min(var(--max), 100%); margin: 0 auto; }
.eyebrow, .section-kicker { display: flex; align-items: center; gap: 9px; color: var(--brand); font-size: 12px; font-weight: 750; letter-spacing: .09em; }
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 6px rgba(22, 119, 255, .1); }
h1, h2, h3 { text-wrap: balance; }
h1 { max-width: 11ch; margin: 22px 0 24px; font-size: clamp(48px, 6vw, 78px); font-weight: 650; line-height: 1.08; letter-spacing: -.05em; }
h1 em, h2 em { color: var(--brand); font-style: normal; }
.hero-lead { max-width: 650px; margin: 0; color: var(--body); font-size: 18px; line-height: 1.85; }
.hero-lead strong { color: var(--ink); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; margin-top: 38px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: var(--line); }
.hero-facts div { min-height: 104px; padding: 18px; background: #fff; }
.hero-facts small { display: block; color: var(--brand); font-size: 11px; font-weight: 750; letter-spacing: .08em; }
.hero-facts strong { display: block; margin-top: 10px; font-size: 15px; line-height: 1.5; }
.hero-visual { position: relative; overflow: hidden; min-height: 520px; padding: 30px; border: 1px solid rgba(22, 119, 255, .18); border-radius: var(--radius-lg); background: linear-gradient(145deg, #eef5ff, #fff 58%, #f2f7ff); box-shadow: var(--shadow); }
.hero-visual::before { content: ""; position: absolute; top: -110px; right: -90px; width: 290px; height: 290px; border: 1px solid rgba(22, 119, 255, .12); border-radius: 50%; box-shadow: 0 0 0 44px rgba(22, 119, 255, .04), 0 0 0 88px rgba(22, 119, 255, .025); }
.visual-label { position: relative; z-index: 1; display: flex; justify-content: space-between; color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .08em; }
.visual-core { position: relative; z-index: 1; display: grid; place-items: center; width: 148px; height: 148px; margin: 56px auto 42px; border: 1px solid rgba(22, 119, 255, .28); border-radius: 50%; background: #fff; box-shadow: 0 16px 40px rgba(22, 119, 255, .13); text-align: center; }
.visual-core b { color: var(--brand); font-size: 32px; }
.visual-core span { display: block; margin-top: 3px; color: var(--muted); font-size: 11px; }
.visual-flow { position: relative; z-index: 1; display: grid; gap: 10px; }
.visual-flow div { display: grid; grid-template-columns: 70px 1fr; gap: 14px; align-items: center; padding: 13px 15px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255, 255, 255, .88); }
.visual-flow small { color: var(--brand); font-weight: 750; }
.visual-flow span { color: var(--body); font-size: 13px; line-height: 1.55; }
.anchor-nav { border-block: 1px solid var(--line); background: #fff; }
.anchor-nav-inner { display: flex; gap: 8px; width: min(var(--max), calc(100% - 48px)); margin: 0 auto; overflow-x: auto; padding: 13px 0; scrollbar-width: thin; }
.anchor-nav a { flex: 0 0 auto; padding: 9px 14px; border-radius: 999px; color: var(--body); font-size: 13px; }
.anchor-nav a:hover { background: var(--brand-soft); color: var(--brand); }
.section { padding: clamp(72px, 9vw, 118px) 24px; }
.section.alt { background: #fff; }
.section.dark { background: #17202a; color: #fff; }
.section-inner { width: min(var(--max), 100%); margin: 0 auto; }
.section-heading { display: grid; grid-template-columns: minmax(0, .9fr) minmax(320px, .7fr); gap: clamp(36px, 8vw, 88px); align-items: end; margin-bottom: 42px; }
.section-heading h2 { max-width: 15ch; margin: 12px 0 0; font-size: clamp(34px, 4.3vw, 58px); line-height: 1.15; letter-spacing: -.04em; }
.section-heading p { margin: 0; color: var(--body); font-size: 16px; line-height: 1.85; }
.dark .section-heading p { color: rgba(255, 255, 255, .66); }
.definition-card { display: grid; grid-template-columns: minmax(240px, .65fr) minmax(0, 1.35fr); gap: 1px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--line); box-shadow: var(--shadow); }
.definition-card > div { padding: clamp(28px, 5vw, 54px); background: #fff; }
.definition-card .definition-term { background: var(--brand); color: #fff; }
.definition-term small { font-size: 11px; font-weight: 750; letter-spacing: .1em; opacity: .74; }
.definition-term strong { display: block; margin: 26px 0 10px; font-size: clamp(38px, 6vw, 68px); line-height: 1; }
.definition-term span { font-size: 16px; }
.definition-copy p { margin: 0; color: var(--body); font-size: 17px; line-height: 1.95; }
.definition-copy p + p { margin-top: 18px; }
.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.card-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.info-card { display: flex; flex-direction: column; min-height: 260px; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.info-card > small { color: var(--brand); font-size: 11px; font-weight: 750; letter-spacing: .08em; }
.info-card h3 { margin: 30px 0 12px; font-size: 20px; line-height: 1.45; }
.info-card p { margin: 0; color: var(--body); font-size: 14px; line-height: 1.8; }
.info-card ul { display: grid; gap: 8px; margin: auto 0 0; padding: 22px 0 0; list-style: none; }
.info-card li { color: var(--muted); font-size: 13px; }
.info-card li::before { content: ""; display: inline-block; width: 6px; height: 6px; margin-right: 9px; border-radius: 50%; background: var(--brand); vertical-align: 1px; }
.process { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--line); }
.process article { min-height: 330px; padding: 28px; background: #fff; }
.process article + article { border-left: 1px solid var(--line); }
.process small { color: var(--brand); font-weight: 750; letter-spacing: .08em; }
.process h3 { margin: 38px 0 14px; font-size: 20px; }
.process p { color: var(--body); font-size: 14px; line-height: 1.8; }
.process strong { display: block; margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 13px; line-height: 1.7; }
.matrix { overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow); }
.matrix-row { display: grid; grid-template-columns: .7fr 1.15fr 1.15fr; }
.matrix-row + .matrix-row { border-top: 1px solid var(--line); }
.matrix-row > div { padding: 20px 24px; color: var(--body); font-size: 14px; line-height: 1.75; }
.matrix-row > div + div { border-left: 1px solid var(--line); }
.matrix-row.head > div { background: #edf4ff; color: var(--ink); font-size: 12px; font-weight: 750; letter-spacing: .06em; }
.matrix-row b { color: var(--ink); }
.deliverables { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.deliverable { display: grid; grid-template-columns: 54px 1fr; gap: 18px; padding: 24px; border: 1px solid rgba(255, 255, 255, .12); border-radius: var(--radius); background: rgba(255, 255, 255, .055); }
.deliverable > span { display: grid; place-items: center; width: 54px; height: 54px; border-radius: 15px; background: rgba(22, 119, 255, .22); color: #82b7ff; font-size: 13px; font-weight: 750; }
.deliverable h3 { margin: 0 0 8px; font-size: 17px; }
.deliverable p { margin: 0; color: rgba(255, 255, 255, .62); font-size: 13px; line-height: 1.75; }
.service-boundary { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.boundary-card { padding: 30px; border-radius: var(--radius); }
.boundary-card.no { border: 1px solid var(--line); background: #fff; }
.boundary-card.yes { border: 1px solid rgba(22, 119, 255, .2); background: var(--brand-soft); }
.boundary-card small { color: var(--brand); font-size: 11px; font-weight: 750; letter-spacing: .08em; }
.boundary-card h3 { margin: 18px 0 14px; font-size: 24px; }
.boundary-card ul { display: grid; gap: 11px; margin: 0; padding: 0; list-style: none; }
.boundary-card li { color: var(--body); font-size: 14px; line-height: 1.7; }
.boundary-card li::before { content: "—"; margin-right: 9px; color: var(--brand); }
/* Search-first knowledge hub. */
.knowledge-intro { position: relative; overflow: hidden; padding: clamp(58px, 8vw, 98px) 24px clamp(42px, 6vw, 72px); border-bottom: 1px solid var(--line); background: radial-gradient(circle at 82% 18%, rgba(22,119,255,.18), transparent 24rem), linear-gradient(145deg, #f8fbff, #eaf3ff 58%, #f5f9ff); }
.knowledge-intro::after { content: ""; position: absolute; inset: 0; opacity: .32; pointer-events: none; background-image: linear-gradient(rgba(22,119,255,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(22,119,255,.08) 1px, transparent 1px); background-size: 44px 44px; mask-image: linear-gradient(to bottom, #000, transparent 92%); }
.knowledge-intro .section-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1fr) minmax(360px, .72fr); gap: clamp(38px, 7vw, 88px); align-items: end; }
.knowledge-kicker { color: var(--brand); font-size: 12px; font-weight: 750; letter-spacing: .14em; }
.knowledge-heading h1 { max-width: none; margin: 14px 0 18px; font-size: clamp(52px, 7vw, 88px); line-height: 1; }
.knowledge-heading p { max-width: 670px; margin: 0; color: var(--body); font-size: 17px; line-height: 1.8; }
.hub-search-wrap { align-self: end; }
.hub-search { display: grid; grid-template-columns: 24px 1fr auto; gap: 12px; align-items: center; min-height: 62px; padding: 8px 10px 8px 18px; border: 1px solid rgba(22,119,255,.24); border-radius: 18px; background: rgba(255,255,255,.9); box-shadow: 0 18px 46px rgba(28,57,82,.1); backdrop-filter: blur(12px); }
.hub-search:focus-within { border-color: var(--brand); box-shadow: 0 0 0 4px rgba(22,119,255,.12), 0 18px 46px rgba(28,57,82,.1); }
.hub-search svg { width: 22px; fill: none; stroke: var(--brand); stroke-width: 2; }
.hub-search input { min-width: 0; border: 0; outline: 0; background: transparent; color: var(--ink); font: inherit; font-size: 16px; }
.hub-search input::placeholder { color: #8493a1; }
.hub-search button { min-height: 44px; padding: 0 14px; border: 0; border-radius: 12px; background: var(--brand-soft); color: var(--brand); font-weight: 700; cursor: pointer; }
.hub-result-count { margin: 12px 4px 0; color: var(--muted); font-size: 13px; }
.hub-section { background: linear-gradient(180deg, #f8fbff, var(--canvas)); }
.hub-filters { display: flex; flex-wrap: wrap; justify-content: flex-start; gap: 10px; margin: 0 0 34px; }
.hub-filter { min-height: 44px; padding: 10px 18px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.86); color: var(--body); font-size: 14px; font-weight: 650; cursor: pointer; transition: border-color .2s, color .2s, background-color .2s, transform .2s; }
.hub-filter:hover { border-color: color-mix(in srgb, var(--brand) 38%, var(--line)); color: var(--brand); transform: translateY(-1px); }
.hub-filter.active { background: var(--brand); border-color: var(--brand); color: #fff; box-shadow: 0 9px 24px rgba(22,119,255,.2); }
.hub-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; align-items: start; }
.hub-card { display: flex; flex-direction: column; padding: 24px 24px 22px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.92); box-shadow: 0 .6rem 1.8rem rgba(28,57,82,.04); transition: border-color .2s, transform .2s, box-shadow .2s; }
.hub-card[hidden], .hub-empty[hidden], .hub-search button[hidden] { display: none !important; }
.hub-card:hover { border-color: color-mix(in srgb, var(--brand) 30%, var(--line)); transform: translateY(-3px); box-shadow: 0 1rem 2.2rem rgba(28,57,82,.08); }
.hub-badge { align-self: flex-start; padding: 4px 11px; border-radius: 999px; background: var(--brand-soft); color: var(--brand); font-size: 11px; font-weight: 750; letter-spacing: .04em; }
.hub-badge--deep { background: #e9eef5; color: #465b70; }
.hub-card summary { position: relative; padding-right: 36px; list-style: none; cursor: pointer; }
.hub-card summary::-webkit-details-marker { display: none; }
.hub-card summary::after { content: "+"; position: absolute; top: 0; right: 0; display: grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--brand-soft); color: var(--brand); font-size: 18px; font-weight: 500; transition: background-color .2s, color .2s; }
.hub-card[open] summary::after { content: "−"; background: var(--brand); color: #fff; }
.hub-q { display: block; margin-top: 12px; color: var(--ink); font-size: 17px; line-height: 1.5; font-weight: 700; }
.hub-body { margin-top: 14px; }
.hub-body p { margin: 0; color: var(--body); font-size: 14px; line-height: 1.85; }
.hub-card--article { min-height: 210px; }
.hub-card--article h3 { margin: 14px 0 0; color: var(--ink); font-size: 17px; line-height: 1.5; font-weight: 700; }
.hub-card--article p { margin: 10px 0 0; color: var(--body); font-size: 14px; line-height: 1.8; }
.hub-more { margin-top: auto; padding-top: 18px; color: var(--brand); font-size: 13px; font-weight: 700; }
.hub-empty { padding: 52px 24px; border: 1px dashed rgba(22,119,255,.28); border-radius: var(--radius); background: rgba(255,255,255,.72); text-align: center; }
.hub-empty strong { font-size: 20px; }
.hub-empty p { margin: 9px 0 0; color: var(--muted); }
/* Plain FAQ list used by secondary pages (e.g. FDE) that share this stylesheet. */
.faq-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.faq-item { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.faq-item[open] { border-color: rgba(22, 119, 255, .28); }
.faq-item summary { position: relative; padding: 22px 54px 22px 24px; font-weight: 700; line-height: 1.6; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; top: 50%; right: 22px; display: grid; place-items: center; width: 27px; height: 27px; border-radius: 50%; background: var(--brand-soft); color: var(--brand); transform: translateY(-50%); }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { margin: 0; padding: 0 24px 24px; color: var(--body); font-size: 14px; line-height: 1.85; }
.faq-hero { padding-bottom: clamp(40px, 6vw, 72px); }
.related-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.related-card { display: flex; flex-direction: column; min-height: 230px; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; transition: .2s; }
.related-card:hover { border-color: rgba(22, 119, 255, .34); transform: translateY(-3px); box-shadow: 0 16px 34px rgba(28, 57, 82, .07); }
.related-card small { color: var(--brand); font-weight: 750; }
.related-card h3 { margin: 28px 0 10px; }
.related-card p { color: var(--body); font-size: 14px; line-height: 1.75; }
.related-card span { margin-top: auto; color: var(--brand); font-size: 13px; font-weight: 700; }
.cta-section { padding: 0 24px 100px; }
.cta-panel { display: grid; grid-template-columns: 1fr 320px; gap: 50px; align-items: center; width: min(var(--max), 100%); margin: 0 auto; padding: clamp(34px, 6vw, 64px); border-radius: var(--radius-lg); background: #17202a; color: #fff; }
.cta-panel h2 { max-width: 13ch; margin: 0; font-size: clamp(34px, 4.5vw, 58px); line-height: 1.14; letter-spacing: -.04em; }
.cta-panel p { max-width: 650px; color: rgba(255, 255, 255, .64); line-height: 1.8; }
.cta-panel .hero-actions { margin-top: 24px; }
.cta-qr { display: grid; grid-template-columns: 132px 1fr; gap: 18px; align-items: center; padding: 16px; border: 1px solid rgba(255, 255, 255, .12); border-radius: var(--radius); background: rgba(255, 255, 255, .06); }
.cta-qr img { width: 132px; height: 132px; padding: 4px; border-radius: 12px; background: #fff; object-fit: contain; }
.cta-qr strong { display: block; font-size: 15px; }
.cta-qr span { display: block; margin-top: 8px; color: rgba(255, 255, 255, .56); font-size: 12px; line-height: 1.65; }
.floating-contact { position: fixed; right: 24px; bottom: 24px; z-index: 60; display: grid; justify-items: end; gap: 10px; }
.floating-contact-trigger { display: inline-flex; align-items: center; gap: 8px; min-height: 50px; padding: 0 18px; border: 0; border-radius: 999px; background: var(--brand); color: #fff; font-weight: 650; box-shadow: 0 14px 34px rgba(22, 119, 255, .3); cursor: pointer; }
.floating-contact-panel { display: none; width: min(350px, calc(100vw - 32px)); padding: 18px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255, 255, 255, .98); box-shadow: 0 24px 70px rgba(28, 57, 82, .2); }
.floating-contact-panel.open { display: block; }
.floating-contact-head { display: flex; justify-content: space-between; gap: 15px; padding-bottom: 15px; }
.floating-contact-head strong, .floating-contact-head span { display: block; }
.floating-contact-head span { margin-top: 4px; color: var(--muted); font-size: 12px; line-height: 1.5; }
.floating-contact-close { flex: 0 0 32px; width: 32px; height: 32px; border: 0; border-radius: 50%; background: var(--canvas); color: var(--muted); cursor: pointer; }
.wechat-contact-card { display: grid; grid-template-columns: 132px 1fr; gap: 14px; align-items: center; padding: 12px; border-radius: 15px; background: var(--brand-soft); }
.wechat-contact-card img { width: 132px; height: 132px; border-radius: 10px; background: #fff; object-fit: contain; }
.wechat-contact-card b, .wechat-contact-card span { display: block; }
.wechat-contact-card span { margin-top: 6px; color: var(--muted); font-size: 12px; line-height: 1.55; }
.floating-contact-options { margin-top: 10px; }
.floating-contact-options a { display: flex; justify-content: space-between; padding: 13px 15px; border: 1px solid var(--line); border-radius: 13px; color: var(--ink); font-size: 13px; font-weight: 650; }
.floating-contact-panel > p { margin: 12px 2px 0; color: var(--muted); font-size: 11px; line-height: 1.55; }
.floating-contact-panel > p a { color: var(--brand); }
footer { padding: 60px max(24px, calc((100vw - var(--max))/2)) 28px; border-top: 1px solid var(--line); background: #fff; }
.footer-main { display: grid; grid-template-columns: minmax(220px, .8fr) minmax(0, 1.2fr); gap: 60px; }
.footer-brand { display: flex; align-items: flex-start; gap: 12px; }
.footer-brand strong, .footer-brand small { display: block; color: var(--brand); }
.footer-brand small { margin-top: 5px; font-size: 8px; letter-spacing: .18em; }
.footer-brand p { max-width: 270px; margin: 14px 0 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.footer-links { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 30px; }
.footer-links div { display: grid; align-content: start; gap: 10px; }
.footer-links b { margin-bottom: 5px; font-size: 13px; }
.footer-links a, .footer-links span { color: var(--muted); font-size: 12px; line-height: 1.55; }
.footer-links a:hover { color: var(--brand); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 44px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.footer-bottom a { color: var(--body); }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (max-width: 1040px) {
  .main-nav { gap: 16px; font-size: 13px; }
  .service-hero-grid { grid-template-columns: 1fr; }
  .hero-visual { min-height: 470px; }
  .card-grid.four, .process { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process article:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); }
  .process article:nth-child(4) { border-top: 1px solid var(--line); }
  .cta-panel { grid-template-columns: 1fr; }
  .cta-qr { max-width: 380px; }
  .knowledge-intro .section-inner { grid-template-columns: 1fr; }
  .hub-search-wrap { max-width: 680px; }
  .hub-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 780px) {
  .site-header { min-height: 68px; }
  .nav-toggle { display: block; }
  .header-cta { display: none; }
  .main-nav { position: absolute; top: 100%; right: 16px; left: 16px; display: none; padding: 12px; border: 1px solid var(--line); border-radius: 18px; background: #fff; box-shadow: var(--shadow); }
  .main-nav.open { display: grid; }
  .main-nav a { padding: 12px 14px; border-radius: 10px; }
  .main-nav a:hover { background: var(--brand-soft); }
  .nav-dropdown { display: grid; }
  .nav-dropdown-toggle { justify-content: space-between; width: 100%; padding: 12px 14px; border-radius: 10px; }
  .nav-dropdown-toggle:hover { background: var(--brand-soft); }
  .nav-dropdown-toggle::before { display: none; }
  .nav-dropdown-menu { position: static; min-width: 0; padding: 0 0 0 12px; border: 0; border-radius: 0; box-shadow: none; opacity: 1; visibility: visible; transform: none; display: none; }
  .nav-dropdown.open .nav-dropdown-menu { display: grid; transform: none; opacity: 1; visibility: visible; }
  .nav-dropdown-menu a { white-space: normal; }
  .breadcrumb { width: calc(100% - 32px); padding-top: 18px; }
  .service-hero { padding-inline: 16px; }
  h1 { font-size: clamp(42px, 12vw, 58px); }
  .hero-lead { font-size: 16px; }
  .hero-facts { grid-template-columns: 1fr; }
  .hero-facts div { min-height: auto; }
  .hero-visual { min-height: auto; padding: 22px; }
  .visual-core { margin-block: 42px 30px; }
  .anchor-nav-inner { width: calc(100% - 32px); }
  .section { padding-inline: 16px; }
  .section-heading { grid-template-columns: 1fr; gap: 20px; }
  .definition-card, .card-grid, .card-grid.four, .process, .deliverables, .service-boundary, .faq-list, .related-grid { grid-template-columns: 1fr; }
  .knowledge-intro { padding-inline: 16px; }
  .knowledge-heading h1 { font-size: clamp(48px, 16vw, 68px); }
  .hub-search { grid-template-columns: 22px 1fr; }
  .hub-search button { grid-column: 1 / -1; width: 100%; }
  .hub-filters { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 8px; scrollbar-width: thin; }
  .hub-filter { flex: 0 0 auto; }
  .hub-grid { grid-template-columns: 1fr; }
  .process article + article { border-left: 0; border-top: 1px solid var(--line); }
  .matrix { overflow-x: auto; }
  .matrix-row { min-width: 700px; }
  .cta-section { padding: 0 16px 72px; }
  .cta-panel { gap: 30px; padding: 28px 20px; }
  .cta-qr { grid-template-columns: 104px 1fr; }
  .cta-qr img { width: 104px; height: 104px; }
  .floating-contact { right: 16px; bottom: 16px; }
  .floating-contact-panel { max-height: calc(100vh - 88px); overflow-y: auto; }
  .wechat-contact-card { grid-template-columns: 110px 1fr; }
  .wechat-contact-card img { width: 110px; height: 110px; }
  footer { padding-inline: 20px; }
  .footer-main { grid-template-columns: 1fr; gap: 36px; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .footer-bottom { display: grid; }
}
@media (max-width: 480px) {
  .brand-mark { width: 47px; flex-basis: 47px; }
  .brand-word strong { font-size: 16px; }
  .visual-flow div { grid-template-columns: 58px 1fr; }
  .footer-links { grid-template-columns: 1fr; }
  .cta-qr { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}