@font-face {
  font-family: "Yao Sans";
  src: url("/assets/fonts/NotoSansTC-Core-Regular.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Yao Sans";
  src: url("/assets/fonts/NotoSansTC-Core-Bold.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: "Yao Plex";
  src: url("/assets/fonts/IBMPlexSans-Latin-Regular.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Yao Plex";
  src: url("/assets/fonts/IBMPlexSans-Latin-Bold.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}

:root {
  --paper: #fff;
  --surface: #fbfbf9;
  --surface-raised: #fff;
  --ink: #151515;
  --muted: #625f5a;
  --line: rgba(21, 21, 21, .13);
  --line-strong: rgba(21, 21, 21, .34);
  --accent: #f15a24;
  --accent-text: #c74619;
  --header-bg: rgba(255, 255, 255, .94);
  --page: min(90vw, 1240px);
  --measure: 68ch;
  --radius-control: 10px;
  --radius-card: 16px;
  color-scheme: light;
}

[data-theme="dark"] {
  --paper: #111;
  --surface: #141414;
  --surface-raised: #171717;
  --ink: #f7f5f1;
  --muted: #aaa6a0;
  --line: rgba(247, 245, 241, .14);
  --line-strong: rgba(247, 245, 241, .42);
  --accent: #ff6a32;
  --accent-text: #ff8b61;
  --header-bg: rgba(17, 17, 17, .94);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  padding-top: 84px;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: "Yao Sans", sans-serif;
  -webkit-font-smoothing: antialiased;
  transition: background-color .28s ease, color .28s ease;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { display: block; max-width: 100%; }
svg { display: block; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 12px;
  padding: 12px 16px;
  transform: translateY(-150%);
  border-radius: var(--radius-control);
  background: var(--ink);
  color: var(--paper);
}

.skip-link:focus { transform: none; }

.site-header {
  position: fixed;
  z-index: 50;
  inset: 0 0 auto;
  height: 84px;
  padding: 0 max(4vw, 24px);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background: var(--header-bg);
  backdrop-filter: blur(14px);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: max-content;
}

.brand-mark { width: 34px; height: 34px; }
.brand-wordmark { width: 116px; height: auto; }
.brand-dark { display: none; }
[data-theme="dark"] .brand-light { display: none; }
[data-theme="dark"] .brand-dark { display: block; }

.desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(22px, 3vw, 44px);
}

.desktop-nav a {
  position: relative;
  padding: 30px 0;
  color: var(--muted);
  font-size: 14px;
}

.desktop-nav a:hover,
.desktop-nav a[aria-current="page"] { color: var(--ink); }
.desktop-nav a[aria-current="page"]::after {
  content: "";
  position: absolute;
  inset: auto 0 19px;
  height: 2px;
  background: var(--accent);
}

.header-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 6px;
}

.theme-toggle,
.mobile-menu-toggle {
  position: relative;
  width: 44px;
  height: 44px;
  display: inline-grid;
  place-items: center;
  border: 0;
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.theme-toggle:hover,
.mobile-menu-toggle:hover { background: var(--line); }
.theme-toggle svg { width: 19px; fill: none; stroke: currentColor; stroke-width: 1.6; }
.moon-icon { display: none; }
[data-theme="dark"] .sun-icon { display: none; }
[data-theme="dark"] .moon-icon { display: block; }

.header-contact,
.primary-action {
  min-height: 44px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  border-radius: var(--radius-control);
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  font-weight: 700;
  transition: background-color .2s ease, color .2s ease;
}

.header-contact:hover,
.primary-action:hover { background: var(--accent); color: #151515; }

.mobile-menu-toggle,
.mobile-nav { display: none; }
.mobile-menu-toggle span {
  position: absolute;
  left: 11px;
  width: 22px;
  height: 1.5px;
  background: currentColor;
  transform-origin: center;
}
.mobile-menu-toggle span:first-child { top: 17px; }
.mobile-menu-toggle span:last-child { top: 26px; }

.seo-main { min-height: 70vh; }
.seo-hero {
  position: relative;
  overflow: hidden;
  min-height: 610px;
  display: grid;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.seo-hero::before,
.seo-hero::after {
  content: "";
  position: absolute;
  pointer-events: none;
}

.seo-hero::before {
  top: 10%;
  right: max(5vw, 24px);
  width: min(36vw, 510px);
  height: 1px;
  background: linear-gradient(90deg, var(--line-strong) 0 58%, var(--accent) 58% 82%, transparent 82%);
}

.seo-hero::after {
  right: clamp(28px, 8vw, 120px);
  bottom: 11%;
  width: 1px;
  height: 28%;
  background: var(--line);
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: var(--page);
  margin: 0 auto;
  padding: clamp(80px, 10vw, 150px) 0 clamp(72px, 9vw, 128px);
}

.breadcrumbs {
  margin: 0 0 clamp(32px, 5vw, 64px);
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  color: var(--muted);
  font: 12px/1.4 "Yao Plex", sans-serif;
  letter-spacing: .05em;
}

.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 8px; color: var(--line-strong); }
.breadcrumbs a:hover { color: var(--accent-text); }

.seo-title {
  max-width: 980px;
  margin: 0;
  font-size: clamp(48px, 6.8vw, 92px);
  line-height: 1.02;
  letter-spacing: -.035em;
  text-wrap: balance;
}

.seo-lead {
  max-width: var(--measure);
  margin: 32px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 1.5vw, 21px);
  line-height: 1.85;
}

.hero-actions { margin-top: 38px; display: flex; flex-wrap: wrap; gap: 14px; }
.text-action {
  min-height: 44px;
  padding: 0 4px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--line-strong);
  font-size: 14px;
  font-weight: 700;
}
.text-action svg,
.inline-link svg,
.row-link svg { width: 18px; fill: none; stroke: currentColor; stroke-width: 1.5; }
.text-action:hover,
.inline-link:hover,
.row-link:hover { color: var(--accent-text); border-color: var(--accent); }

.content-section {
  width: var(--page);
  margin: 0 auto;
  padding: clamp(76px, 9vw, 132px) 0;
  border-bottom: 1px solid var(--line);
}

.content-section:last-child { border-bottom: 0; }
.section-heading {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(360px, 1.15fr);
  gap: clamp(42px, 8vw, 120px);
  align-items: start;
  margin-bottom: clamp(44px, 6vw, 84px);
}

.section-heading h2,
.cta-section h2 {
  margin: 0;
  font-size: clamp(36px, 4.4vw, 64px);
  line-height: 1.08;
  letter-spacing: -.03em;
  text-wrap: balance;
}

.section-heading p,
.prose p {
  max-width: var(--measure);
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
}

.section-heading p + p,
.prose p + p { margin-top: 18px; }

.service-index,
.content-rows,
.related-list { border-top: 1px solid var(--line-strong); }

.service-row,
.content-row,
.related-row {
  display: grid;
  align-items: center;
  border-bottom: 1px solid var(--line);
}

.service-row {
  grid-template-columns: minmax(170px, .8fr) minmax(0, 1.25fr) 44px;
  gap: 28px;
  min-height: 126px;
}

.service-row strong,
.content-row h3,
.related-row strong {
  font-size: clamp(22px, 2vw, 30px);
  line-height: 1.25;
  letter-spacing: -.02em;
}

.service-row p,
.content-row p,
.related-row span { color: var(--muted); line-height: 1.75; }
.service-row svg,
.related-row svg { width: 22px; fill: none; stroke: var(--accent); stroke-width: 1.5; }
.service-row:hover strong,
.related-row:hover strong { color: var(--accent-text); }

.content-row {
  grid-template-columns: minmax(200px, .75fr) minmax(0, 1.25fr);
  gap: clamp(30px, 6vw, 90px);
  padding: 34px 0;
}
.content-row h3,
.content-row p { margin: 0; }

.deliverables {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line);
}

.deliverable {
  min-height: 180px;
  padding: clamp(26px, 3vw, 42px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.deliverable h3 { margin: 0 0 14px; font-size: 22px; }
.deliverable p { margin: 0; color: var(--muted); line-height: 1.75; }

.related-row {
  grid-template-columns: minmax(0, 1fr) minmax(220px, .65fr) 44px;
  gap: 28px;
  min-height: 108px;
}

.case-summary {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(320px, 1.1fr);
  gap: clamp(48px, 8vw, 120px);
  align-items: start;
}

.case-facts {
  margin: 0;
  border-top: 1px solid var(--line-strong);
}
.case-facts div {
  padding: 22px 0;
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 22px;
  border-bottom: 1px solid var(--line);
}
.case-facts dt { color: var(--muted); }
.case-facts dd { margin: 0; font-weight: 700; line-height: 1.6; }

.server-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.server-node {
  padding: clamp(28px, 4vw, 46px);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--surface-raised);
}
.server-node:first-child { grid-column: 1 / -1; }
.server-node h3 { margin: 8px 0 24px; font-size: clamp(26px, 3vw, 40px); }
.node-location { color: var(--accent-text); font: 12px/1.4 "Yao Plex", sans-serif; letter-spacing: .06em; }
.node-specs { margin: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line-strong); }
.node-specs div { padding: 20px 16px 0 0; }
.node-specs dt { color: var(--muted); font-size: 13px; }
.node-specs dd { margin: 8px 0 0; font: 700 20px/1.3 "Yao Plex", sans-serif; overflow-wrap: anywhere; }

.cta-section {
  width: var(--page);
  margin: 0 auto;
  padding: clamp(74px, 9vw, 124px) 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 44px;
  align-items: end;
}
.cta-section p { max-width: 620px; margin: 22px 0 0; color: var(--muted); font-size: 17px; line-height: 1.8; }

.site-footer {
  padding: 64px max(5vw, 24px) 34px;
  border-top: 1px solid var(--line);
  background: var(--surface);
}
.footer-grid {
  width: min(100%, 1240px);
  margin: 0 auto 54px;
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: clamp(30px, 5vw, 74px);
}
.footer-column { display: grid; align-content: start; gap: 12px; }
.footer-column strong { margin-bottom: 5px; font-size: 13px; }
.footer-column a { width: fit-content; color: var(--muted); font-size: 14px; }
.footer-column a:hover { color: var(--accent-text); }
.footer-brand { margin-bottom: 18px; }
.footer-company { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.footer-bottom {
  width: min(100%, 1240px);
  margin: 0 auto;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.error-page .seo-hero { min-height: calc(100svh - 84px); }
.error-code { margin-bottom: 24px; color: var(--accent-text); font: 700 15px/1 "Yao Plex", sans-serif; letter-spacing: .08em; }

.eyebrow {
  margin: 0 0 22px;
  color: var(--accent-text);
  font: 700 12px/1.4 "Yao Plex", sans-serif;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.blog-hero { min-height: 500px; }
.blog-list {
  width: var(--page);
  margin: 0 auto;
  padding: clamp(72px, 9vw, 124px) 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}
.blog-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  background: var(--surface-raised);
}
.blog-card-link { height: 100%; display: flex; flex-direction: column; }
.blog-card-cover { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-bottom: 1px solid var(--line); }
.blog-card-placeholder {
  display: grid;
  place-items: end start;
  padding: 24px;
  background: linear-gradient(145deg, var(--surface) 0 66%, color-mix(in srgb, var(--accent) 18%, var(--surface)) 66%);
  color: var(--muted);
  font: 12px/1.4 "Yao Plex", sans-serif;
  letter-spacing: .06em;
}
.blog-card-content { padding: clamp(24px, 3vw, 38px); display: flex; flex: 1; flex-direction: column; }
.blog-card-content h2 { margin: 18px 0 14px; font-size: clamp(26px, 2.6vw, 38px); line-height: 1.22; letter-spacing: -.025em; }
.blog-card-content > p:not(.blog-card-meta) { margin: 0 0 28px; color: var(--muted); line-height: 1.75; }
.blog-card-meta { margin: 0; display: flex; flex-wrap: wrap; gap: 8px 18px; color: var(--muted); font: 12px/1.5 "Yao Plex", sans-serif; }
.blog-card .inline-link { margin-top: auto; color: var(--accent-text); font-weight: 700; }
.blog-card:hover h2 { color: var(--accent-text); }
.blog-empty { grid-column: 1 / -1; max-width: 760px; padding: clamp(40px, 7vw, 80px); border: 1px solid var(--line); border-radius: var(--radius-card); background: var(--surface); }
.blog-empty h2 { margin: 0; font-size: clamp(34px, 4vw, 54px); }
.blog-empty > p:not(.eyebrow) { max-width: 620px; margin: 22px 0 30px; color: var(--muted); font-size: 17px; line-height: 1.8; }

.article-hero {
  width: var(--page);
  margin: 0 auto;
  padding: clamp(88px, 10vw, 154px) 0 clamp(60px, 8vw, 104px);
}
.article-hero h1 { max-width: 1000px; margin: 0; font-size: clamp(48px, 6.8vw, 88px); line-height: 1.04; letter-spacing: -.035em; text-wrap: balance; }
.article-meta { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 12px 28px; color: var(--muted); font: 13px/1.5 "Yao Plex", sans-serif; }
.article-cover { width: var(--page); margin: 0 auto clamp(60px, 8vw, 100px); overflow: hidden; border-radius: var(--radius-card); }
.article-cover img { width: 100%; max-height: 720px; object-fit: cover; }
.article-layout {
  width: var(--page);
  margin: 0 auto;
  padding-bottom: clamp(90px, 11vw, 150px);
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(220px, 320px);
  justify-content: space-between;
  gap: clamp(60px, 9vw, 140px);
}
.article-body { min-width: 0; color: var(--ink); font-size: clamp(16px, 1.35vw, 18px); line-height: 1.95; }
.article-body > :first-child { margin-top: 0; }
.article-body h2 { margin: 2.1em 0 .75em; font-size: clamp(30px, 3vw, 42px); line-height: 1.22; }
.article-body h3 { margin: 1.9em 0 .7em; font-size: clamp(23px, 2.2vw, 30px); line-height: 1.3; }
.article-body p, .article-body ul, .article-body ol { margin: 0 0 1.55em; }
.article-body a { color: var(--accent-text); text-decoration: underline; text-underline-offset: 3px; }
.article-body img { margin: 2.3em 0; border-radius: 12px; }
.article-body blockquote { margin: 2em 0; padding: 22px 0; border-top: 1px solid var(--accent); border-bottom: 1px solid var(--line); color: var(--muted); }
.article-body pre { max-width: 100%; overflow: auto; padding: 22px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); font: 14px/1.7 ui-monospace, monospace; }
.article-aside { position: sticky; top: 116px; align-self: start; padding-top: 22px; border-top: 2px solid var(--accent); }
.article-aside strong { font-size: 18px; }
.article-aside p { margin: 14px 0 24px; color: var(--muted); line-height: 1.7; }

@media (max-width: 820px) {
  body { padding-top: 72px; }
  .site-header { height: 72px; padding: 0 20px; grid-template-columns: 1fr auto; }
  .desktop-nav,
  .header-contact { display: none; }
  .brand-mark { width: 30px; height: 30px; }
  .brand-wordmark { width: 96px; }
  .mobile-menu-toggle { display: block; }
  .mobile-nav {
    position: fixed;
    z-index: 49;
    inset: 72px 0 0;
    display: block;
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: clamp(30px, 8vh, 64px) 20px max(28px, env(safe-area-inset-bottom));
    border-top: 1px solid var(--line);
    background: var(--paper);
  }
  .mobile-nav[hidden] { display: none; }
  .mobile-nav-inner { min-height: 100%; display: flex; flex-direction: column; }
  .mobile-nav-inner > a:not(.mobile-nav-contact) {
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--line);
    font-size: clamp(24px, 8vw, 34px);
    font-weight: 700;
    letter-spacing: -.02em;
  }
  .mobile-nav-inner > a:not(.mobile-nav-contact)::after {
    content: "";
    width: 8px;
    height: 8px;
    border-top: 1.5px solid var(--accent);
    border-right: 1.5px solid var(--accent);
    transform: rotate(45deg);
  }
  .mobile-nav-contact { margin-top: auto; }
  body.mobile-nav-open { overflow: hidden; }
  .seo-hero { min-height: 540px; }
  .seo-hero::before { top: 8%; width: 58vw; }
  .seo-hero::after { height: 20%; }
  .section-heading,
  .case-summary { grid-template-columns: 1fr; gap: 28px; }
  .service-row { grid-template-columns: minmax(0, 1fr) 36px; gap: 18px; padding: 28px 0; }
  .service-row p { grid-column: 1 / -1; margin: -12px 0 0; }
  .service-row svg { grid-column: 2; grid-row: 1; }
  .content-row { grid-template-columns: 1fr; gap: 12px; }
  .related-row { grid-template-columns: minmax(0, 1fr) 36px; gap: 18px; padding: 26px 0; }
  .related-row span { grid-column: 1 / -1; margin-top: -12px; }
  .related-row svg { grid-column: 2; grid-row: 1; }
  .cta-section { grid-template-columns: 1fr; align-items: start; }
  .server-grid { grid-template-columns: 1fr; }
  .server-node:first-child { grid-column: auto; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .blog-list { grid-template-columns: 1fr; }
  .article-layout { grid-template-columns: 1fr; gap: 50px; }
  .article-aside { position: static; }
}

@media (max-width: 560px) {
  .site-header { padding: 0 16px; }
  .header-actions { gap: 0; }
  .hero-inner { padding: 66px 0 76px; }
  .seo-title { font-size: clamp(42px, 13vw, 58px); }
  .seo-lead { margin-top: 26px; font-size: 16px; }
  .content-section { padding: 72px 0; }
  .deliverables { grid-template-columns: 1fr; }
  .deliverable { min-height: auto; }
  .case-facts div { grid-template-columns: 1fr; gap: 6px; }
  .node-specs { grid-template-columns: 1fr 1fr; }
  .node-specs div { padding-right: 8px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { display: grid; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; }
}