:root {
  --paper: #f5f4ef;
  --paper2: #ecebe5;
  --ink: #172019;
  --muted: #687168;
  --line: #d6d7cf;
  --accent: #6d9466;
  --accent2: #4f714b;
  --white: #fff;
  --max: 1220px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, "Noto Sans TC", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  line-break: loose;
  word-break: normal;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.mobile-break { display: none; }

.container { width: min(calc(100% - 40px), var(--max)); margin: auto; }
.narrow { width: min(calc(100% - 40px), 900px); margin: auto; }
.section { padding: 108px 0; }

header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(245, 244, 239, .93);
  backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--line);
}

.nav { height: 76px; display: flex; align-items: center; gap: 28px; }
.brand { display: flex; align-items: center; gap: 11px; min-width: 0; }
.mark {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--ink);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
}
.brand > span:last-child { display: flex; flex-direction: column; min-width: 0; }
.brand strong { font-size: 18px; }
.brand small { font-size: 11px; color: var(--muted); margin-top: 4px; }
.nav nav { display: flex; gap: 24px; margin-left: auto; font-size: 14px; }
.nav-cta {
  border: 1px solid var(--accent);
  color: var(--accent2);
  padding: 10px 15px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
}
.menu { display: none; margin-left: auto; border: 0; background: none; padding: 8px; }
.menu span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--ink);
  margin: 6px;
  transition: transform .2s ease, opacity .2s ease;
}

.eyebrow,
.index {
  font-size: 11px;
  letter-spacing: .15em;
  font-weight: 700;
  color: var(--accent2);
  margin: 0 0 22px;
}

.hero { padding-top: 92px; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 72px;
  align-items: center;
}
.hero-copy,
.hero-panel,
.solution-grid article,
.case-card,
.insight-grid article,
.contact-box { min-width: 0; }

.hero h1,
.dark h2,
.section-heading h2,
.products-layout h2,
.partner-grid h2,
.contact h2,
.case-hero h1 {
  font-size: clamp(42px, 5.2vw, 70px);
  line-height: 1.08;
  letter-spacing: 0;
  margin: 0;
  text-wrap: balance;
}

.lead { font-size: 18px; line-height: 1.85; color: var(--muted); margin: 28px 0; }
.lead,
.hero-note,
.method p,
.proof span,
.copy-grid p,
.section-heading > div > p,
.products-layout > div > p,
.solution-grid p,
.product-list p,
.case-content p,
.case-note,
.insight-grid p,
.partner-grid p,
.contact-box p,
.article-grid article p,
.image-grid figcaption,
.outcome-grid p,
.system-map p {
  overflow-wrap: break-word;
  word-break: normal;
}
.process-column p,
.process-column li {
  overflow-wrap: break-word;
  word-break: normal;
  white-space: normal;
}
.actions { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.button { display: inline-flex; padding: 15px 23px; border-radius: 999px; font-weight: 700; }
.primary { background: var(--ink); color: #fff; }
.text-link { font-weight: 700; }
.hero-note {
  display: flex;
  gap: 18px;
  border-top: 1px solid var(--line);
  padding-top: 22px;
  margin-top: 44px;
  font-size: 12px;
  color: var(--muted);
  flex-wrap: wrap;
}
.hero-note strong { color: var(--ink); }
.hero-panel {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
  padding: 28px;
  box-shadow: 0 26px 65px rgba(25, 34, 27, .1);
}
.panel-label { font-size: 10px; letter-spacing: .14em; color: var(--muted); margin-bottom: 20px; }
.process-board {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) auto minmax(0, .95fr) auto minmax(0, .95fr);
  gap: 12px;
  align-items: stretch;
}
.process-column {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
  padding: 18px;
}
.process-column span {
  color: var(--accent2);
  font-size: 10px;
  letter-spacing: .08em;
}
.process-column h3 {
  font-size: 21px;
  line-height: 1.35;
  margin: 24px 0 12px;
}
.process-column p,
.process-column li {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}
.process-column ul {
  display: grid;
  gap: 7px;
  margin: 0;
  padding-left: 1.1em;
}
.process-column.design { background: #fff; }
.process-column.system { background: #eef3ea; border-color: #c8d4c3; }
.process-arrow {
  align-self: center;
  color: var(--accent2);
  font-weight: 700;
  opacity: .75;
}
.evidence-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 14px;
}
.evidence-strip figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper);
}
.evidence-strip img {
  width: 100%;
  height: 150px;
  object-fit: cover;
  object-position: top;
}
.evidence-strip figcaption {
  padding: 10px 12px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}
.method { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.method.compact article { min-height: 145px; }
.method article {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  min-height: 180px;
}
.method span { font-size: 10px; color: var(--accent2); }
.method h3 { font-size: 22px; margin: 30px 0 10px; }
.method p { color: var(--muted); line-height: 1.65; font-size: 14px; }

.proof { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.proof-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.proof article {
  padding: 24px 20px;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.proof article:first-child { border-left: 1px solid var(--line); }
.proof strong { font-size: 14px; }
.proof span { font-size: 12px; color: var(--muted); }

.dark { background: var(--ink); color: #fff; }
.split,
.section-heading { display: grid; grid-template-columns: .32fr 1fr; gap: 70px; }
.dark .index { color: #a7b7a4; }
.copy-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 25px; margin-top: 38px; }
.copy-grid p { color: #c7cec8; line-height: 1.85; font-size: 17px; }
.section-heading { margin-bottom: 48px; }
.section-heading > div > p,
.products-layout > div > p,
.partner-grid p { color: var(--muted); font-size: 17px; line-height: 1.8; }

.solution-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.solution-grid article {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 18px;
  padding: 25px;
  min-height: 240px;
}
.solution-grid span { font-size: 10px; color: var(--accent2); }
.solution-grid h3 { font-size: 24px; margin: 38px 0 13px; }
.solution-grid p { color: var(--muted); line-height: 1.7; }

.muted { background: var(--paper2); }
.products-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; }
.product-list { border-top: 1px solid var(--line); }
.product-list article { padding: 24px 0; border-bottom: 1px solid var(--line); }
.product-list small { color: var(--accent2); letter-spacing: .1em; }
.product-list h3 { font-size: 30px; margin: 8px 0; }
.product-list p { margin: 0; color: var(--muted); }

.cases { background: #fff; }
.case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.case-card {
  border: 1px solid var(--line);
  border-radius: 22px;
  overflow: hidden;
  background: var(--paper);
  transition: .2s transform;
}
.case-card:hover { transform: translateY(-3px); }
.case-image { height: 350px; overflow: hidden; }
.case-image img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.case-content { padding: 28px; }
.case-content small { color: var(--accent2); }
.case-content h3 { font-size: 27px; line-height: 1.4; margin: 22px 0 12px; }
.case-content p { color: var(--muted); line-height: 1.7; }
.case-content span { font-weight: 700; }
.case-note { margin-top: 20px; color: var(--muted); font-size: 13px; }

.insights { background: var(--paper2); }
.insight-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.insight-grid article {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 23px;
  min-height: 245px;
}
.insight-grid small { color: var(--accent2); }
.insight-grid h3 { font-size: 21px; line-height: 1.45; margin: 36px 0 12px; }
.insight-grid p { color: var(--muted); line-height: 1.7; }

.partner-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; }
.tags { display: flex; flex-wrap: wrap; gap: 9px; }
.tags span { border: 1px solid var(--line); border-radius: 999px; padding: 9px 13px; font-size: 13px; }

.contact { padding-top: 0; }
.contact-box {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 65px;
  background: var(--ink);
  color: #fff;
  border-radius: 24px;
  padding: 64px;
}
.eyebrow.light { color: #dce9da; }
.contact-box > div > p:last-child { color: #c7cec8; line-height: 1.8; }
.contact form { display: flex; flex-direction: column; gap: 12px; }
.contact label { display: flex; flex-direction: column; gap: 7px; color: #dce9da; font-size: 13px; }
.contact input,
.contact textarea {
  width: 100%;
  background: #202b23;
  border: 1px solid #3a443c;
  color: #fff;
  border-radius: 10px;
  padding: 14px;
  font: inherit;
}
.contact input:focus,
.contact textarea:focus,
.contact button:focus,
.button:focus,
.text-link:focus,
.nav a:focus,
.nav-cta:focus {
  outline: 3px solid rgba(109, 148, 102, .45);
  outline-offset: 3px;
}
.contact button { border: 0; border-radius: 999px; padding: 14px; font-weight: 700; cursor: pointer; }
.contact button[disabled] { opacity: .68; cursor: wait; }
.form-status { min-height: 22px; margin: 4px 0 0; color: #dce9da; font-size: 13px; line-height: 1.6; }
.form-status.error { color: #ffd6d6; }

.footer {
  display: grid;
  grid-template-columns: 1.2fr 1fr auto;
  gap: 28px;
  align-items: center;
  padding: 42px 0;
  border-top: 1px solid var(--line);
}
.footer p,
.footer > small { color: var(--muted); }

.case-page .case-hero { background: #fff; }
.article-grid { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 70px; }
.article-grid aside { display: flex; flex-direction: column; gap: 10px; align-items: flex-start; }
.article-grid aside span { border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; font-size: 12px; }
.article-grid article h2,
.narrow h2 { font-size: 36px; margin: 0 0 15px; }
.article-grid article p { font-size: 17px; line-height: 1.9; color: var(--muted); margin-bottom: 40px; }
.image-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.image-grid.two { grid-template-columns: 1fr 1fr; }
.image-grid figure {
  margin: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
}
.image-grid img { width: 100%; height: 460px; object-fit: cover; object-position: top; }
.image-grid figcaption { padding: 14px; font-size: 13px; line-height: 1.6; }
.outcome-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.outcome-grid article { border: 1px solid var(--line); border-radius: 16px; padding: 22px; background: #fff; }
.outcome-grid p { color: var(--muted); line-height: 1.7; }
.system-map { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 26px; }
.system-map article {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  background: #fff;
}
.system-map small { color: var(--accent2); font-weight: 700; letter-spacing: .08em; }
.system-map h3 { font-size: 20px; line-height: 1.4; margin: 18px 0 10px; }
.system-map p { color: var(--muted); line-height: 1.7; margin: 0; font-size: 15px; }

@media (max-width: 950px) {
  .nav-cta { display: none; }
  .nav { position: relative; }
  .nav nav {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    margin-left: 0;
    padding: 18px 0 20px;
    background: rgba(245, 244, 239, .98);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 34px rgba(18, 32, 24, .08);
  }
  .nav nav.open {
    display: grid;
    gap: 0;
  }
  .nav nav a {
    padding: 14px 2px;
    font-size: 17px;
    font-weight: 700;
  }
  .menu { display: block; }
  .menu[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
  .menu[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }
  .hero-grid,
  .split,
  .section-heading,
  .products-layout,
  .partner-grid,
  .contact-box,
  .article-grid { grid-template-columns: 1fr; }
  .copy-grid { grid-template-columns: 1fr; }
  .solution-grid { grid-template-columns: 1fr 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .insight-grid { grid-template-columns: 1fr; }
  .image-grid { grid-template-columns: 1fr 1fr; }
  .system-map { grid-template-columns: 1fr 1fr; }
  .footer { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .container,
  .narrow { width: min(calc(100% - 28px), var(--max)); }
  .section { padding: 76px 0; }
  .hero { padding-top: 76px; }
  .hero-grid { gap: 52px; }
  .hero h1,
  .dark h2,
  .section-heading h2,
  .products-layout h2,
  .partner-grid h2,
  .contact h2,
  .case-hero h1 { font-size: clamp(31px, 8.8vw, 36px); line-height: 1.16; }
  .mobile-break { display: initial; }
  .lead { font-size: 16px; }
  .actions { align-items: stretch; gap: 14px; }
  .actions .button,
  .actions .text-link { width: 100%; justify-content: center; text-align: center; }
  .hero-panel { padding: 18px; border-radius: 18px; }
  .process-board {
    grid-template-columns: 1fr;
  }
  .process-arrow {
    justify-self: center;
    transform: rotate(90deg);
  }
  .process-column h3 { margin-top: 18px; }
  .evidence-strip { grid-template-columns: 1fr; }
  .evidence-strip img { height: 170px; }
  .method { grid-template-columns: 1fr; }
  .method article,
  .method.compact article { min-height: auto; }
  .proof-grid { grid-template-columns: 1fr 1fr; }
  .proof article { padding: 18px 14px; }
  .solution-grid { grid-template-columns: 1fr; }
  .solution-grid article,
  .insight-grid article,
  .system-map article,
  .outcome-grid article {
    padding: 20px;
  }
  .solution-grid h3,
  .case-content h3,
  .insight-grid h3,
  .system-map h3 {
    font-size: 22px;
    overflow-wrap: break-word;
  }
  .solution-grid p,
  .system-map p,
  .article-grid article p,
  .lead {
    max-width: 100%;
  }
  .case-image { height: 300px; }
  .contact-box { padding: 32px 22px; border-radius: 18px; }
  .image-grid,
  .image-grid.two,
  .outcome-grid,
  .system-map { grid-template-columns: 1fr; }
  .image-grid img { height: 420px; }
}