/* 百原科技品牌官網 — www.baiyuan.io（亮色系） */
:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-elevated: #ffffff;
  --color-surface-glass: rgba(255, 255, 255, 0.78);
  --color-border: #e2e8f0;
  --color-border-strong: rgba(148, 163, 184, 0.28);
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-accent: #059669;
  --color-primary-soft: rgba(37, 99, 235, 0.12);
  --header-border: rgba(226, 232, 240, 0.75);
  --hero-bg-start: rgba(37, 99, 235, 0.09);
  --hero-orb: rgba(59, 130, 246, 0.22);
  --bg-glow-1: rgba(37, 99, 235, 0.1);
  --bg-glow-2: rgba(5, 150, 105, 0.08);
  --footer-border: rgba(226, 232, 240, 0.8);
  --footer-bg-start: rgba(255, 255, 255, 0.94);
  --footer-bg-end: rgba(255, 255, 255, 1);
  --font-sans: "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-pill: 999px;
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-sm: 0 2px 6px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 12px 34px rgba(15, 23, 42, 0.14);
  --shadow-xl: 0 18px 48px rgba(15, 23, 42, 0.18);
  --shadow-primary: 0 8px 18px rgba(37, 99, 235, 0.28);
  --shadow: var(--shadow-sm);
  --container-max-width: 1040px;
  --space-section: 4rem;
  --space-section-sm: 2.5rem;
  --space-card-gap: 1.25rem;
  --focus-ring: 0 0 0 3px rgba(37, 99, 235, 0.2);
  --transition-base: 0.2s ease;
  --transition-slow: 0.28s ease;
  --card-hover-translate: -4px;
  --logo-mark-height: calc(var(--header-min-height) - 0.02rem);
  --logo-mark-height-mobile: calc(var(--header-min-height) - 0.01rem);
  --logo-text-color: #2563eb;
  --logo-text-size: 1.65rem;
  --logo-text-size-mobile: 1.2rem;
  --header-min-height: 4.25rem;
  --logo-area-width: 10rem;
  --nav-track-gap: 0.625rem;
  --nav-item-min-width: 4.2rem;
  --nav-item-wide-min-width: 5.6rem;
  --nav-track-width: calc((var(--nav-item-min-width) * 3) + var(--nav-item-wide-min-width) + (var(--nav-track-gap) * 3));
  --nav-text-size: 0.9rem;
}

:root[data-theme="dark"] {
  --color-bg: #0b1220;
  --color-surface: #0f172a;
  --color-surface-elevated: #111b31;
  --color-surface-glass: rgba(15, 23, 42, 0.82);
  --color-border: #334155;
  --color-border-strong: rgba(148, 163, 184, 0.4);
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-primary: #60a5fa;
  --color-primary-hover: #3b82f6;
  --color-accent: #34d399;
  --color-primary-soft: rgba(96, 165, 250, 0.2);
  --header-border: rgba(51, 65, 85, 0.78);
  --hero-bg-start: rgba(59, 130, 246, 0.18);
  --hero-orb: rgba(96, 165, 250, 0.2);
  --bg-glow-1: rgba(96, 165, 250, 0.2);
  --bg-glow-2: rgba(52, 211, 153, 0.12);
  --footer-border: rgba(51, 65, 85, 0.9);
  --footer-bg-start: rgba(15, 23, 42, 0.95);
  --footer-bg-end: rgba(15, 23, 42, 1);
  --shadow-xs: 0 1px 2px rgba(2, 6, 23, 0.45);
  --shadow-sm: 0 4px 12px rgba(2, 6, 23, 0.45);
  --shadow-md: 0 12px 30px rgba(2, 6, 23, 0.5);
  --shadow-lg: 0 16px 38px rgba(2, 6, 23, 0.56);
  --shadow-xl: 0 20px 54px rgba(2, 6, 23, 0.62);
  --shadow-primary: 0 10px 26px rgba(59, 130, 246, 0.35);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background:
    radial-gradient(circle at 10% -10%, var(--bg-glow-1), transparent 36%),
    radial-gradient(circle at 95% 0%, var(--bg-glow-2), transparent 30%),
    var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface-glass);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--header-border);
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: nowrap;
  gap: 0.625rem;
  min-height: var(--header-min-height);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  width: var(--logo-area-width);
  white-space: nowrap;
  color: var(--logo-text-color);
  text-decoration: none;
}

.logo-mark {
  width: auto;
  height: var(--logo-mark-height);
  max-width: none;
  max-height: none;
  display: block;
  object-fit: contain;
  flex: 0 0 auto;
}

.logo-text {
  font-size: var(--logo-text-size);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--logo-text-color);
  transition: color var(--transition-base);
}

.logo:hover {
  text-decoration: none;
}

.logo:hover .logo-text {
  color: var(--color-primary-hover);
}

.nav ul {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: end;
  gap: var(--nav-track-gap);
  list-style: none;
  margin: 0;
  padding: 0;
  white-space: nowrap;
}

.nav {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  flex: 1 1 auto;
  width: auto;
  min-width: 0;
  margin-left: auto;
}

.nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  white-space: nowrap;
  font-size: var(--nav-text-size);
  line-height: 1.2;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
}

.nav .nav-static {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  white-space: nowrap;
  font-size: var(--nav-text-size);
  line-height: 1.2;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  font-weight: 600;
  background: rgba(148, 163, 184, 0.14);
  border: 1px dashed rgba(148, 163, 184, 0.35);
  user-select: none;
  cursor: default;
}

.nav a:hover,
.nav a.active,
.nav a[aria-current="page"] {
  color: var(--color-text);
  background: var(--color-primary-soft);
  box-shadow: var(--shadow-xs);
}

.nav-toggle {
  flex: 0 0 auto;
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  border-radius: var(--radius);
  box-shadow: var(--shadow-xs);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle::before {
  content: "";
  width: 1.25rem;
  height: 2px;
  background: currentColor;
  box-shadow: 0 -6px 0 currentColor, 0 6px 0 currentColor;
}

.theme-toggle {
  flex: 0 0 auto;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface-elevated);
  color: var(--color-text-muted);
  box-shadow: var(--shadow-xs);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  transition: color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.theme-toggle svg {
  width: 1.1rem;
  height: 1.1rem;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-toggle-fallback {
  display: inline-block;
  font-size: 1rem;
  line-height: 1;
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-primary-soft);
  box-shadow: var(--shadow-sm);
}

.theme-toggle[aria-pressed="true"] {
  color: var(--color-text);
  background: var(--color-primary-soft);
}

.theme-toggle:active {
  transform: translateY(1px);
}

.lang-toggle {
  flex: 0 0 auto;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface-elevated);
  color: var(--color-text-muted);
  box-shadow: var(--shadow-xs);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.76rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  transition: color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.lang-toggle:hover {
  color: var(--color-text);
  background: var(--color-primary-soft);
  box-shadow: var(--shadow-sm);
}

.lang-toggle:active {
  transform: translateY(1px);
}

.lang-menu {
  position: fixed;
  z-index: 160;
  min-width: 10rem;
  padding: 0.35rem;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  background: var(--color-surface-elevated);
  box-shadow: var(--shadow-lg);
}

.lang-menu[hidden] {
  display: none;
}

.lang-menu__item {
  width: 100%;
  border: 0;
  border-radius: calc(var(--radius) - 2px);
  background: transparent;
  color: var(--color-text-muted);
  text-align: left;
  padding: 0.5rem 0.65rem;
  font-size: 0.875rem;
  line-height: 1.3;
  cursor: pointer;
}

.lang-menu__item:hover {
  background: var(--color-primary-soft);
  color: var(--color-text);
}

.lang-menu__item.is-active {
  background: var(--color-primary-soft);
  color: var(--color-text);
  font-weight: 600;
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  min-height: clamp(380px, 52vw, 620px);
  padding: clamp(4.5rem, 9vw, 7.5rem) 0 clamp(4.25rem, 8vw, 6.5rem);
  text-align: center;
  display: flex;
  align-items: center;
  background: #07172f;
}

.hero-bg-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.02);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      180deg,
      rgba(4, 16, 40, 0.45) 0%,
      rgba(4, 16, 40, 0.6) 50%,
      rgba(4, 16, 40, 0.74) 100%
    ),
    radial-gradient(circle at 50% 15%, rgba(56, 189, 248, 0.2), transparent 56%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-kicker {
  margin: 0 0 0.75rem;
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #bfdbfe;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.25;
  color: #f8fbff;
  text-shadow: 0 8px 24px rgba(2, 10, 24, 0.5);
}

.hero-tagline {
  margin: 0 0 2rem;
  font-size: 1.125rem;
  color: rgba(241, 245, 249, 0.94);
  max-width: 36em;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero .btn-secondary {
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(255, 255, 255, 0.72);
  color: #0f172a;
  text-shadow: none;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.18);
}

.hero .btn-secondary:hover {
  background: #ffffff;
  border-color: rgba(255, 255, 255, 0.95);
  color: #020617;
}

/* Buttons */
.btn {
  position: relative;
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition-base), color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
}

.btn-primary {
  background: linear-gradient(180deg, #3b82f6 0%, var(--color-primary) 100%);
  color: #fff;
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  background: linear-gradient(180deg, #2563eb 0%, var(--color-primary-hover) 100%);
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(29, 78, 216, 0.32);
  text-decoration: none;
  color: #fff;
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
  background: #f1f5f9;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: var(--color-text);
}

.btn:active {
  transform: translateY(1px);
  box-shadow: var(--shadow-xs);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-sm {
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
}

.btn[aria-busy="true"] {
  cursor: progress;
}

/* Features */
.features {
  padding: calc(var(--space-section) - 1rem) 0 var(--space-section);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.features h2 {
  margin: 0 0 2rem;
  font-size: 1.5rem;
  text-align: center;
  color: var(--color-text);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  padding: 1.5rem;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-base);
}

.feature-card:hover {
  transform: translateY(var(--card-hover-translate));
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.24);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.feature-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  color: var(--color-text);
}

.feature-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.feature-list {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.feature-list li + li {
  margin-top: 0.35rem;
}

.section-intro {
  margin: 0 0 1.5rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* Process */
.process {
  padding: var(--space-section) 0;
}

.process h2 {
  margin: 0 0 0.75rem;
  text-align: center;
  font-size: 1.5rem;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-card-gap);
}

.process-card {
  padding: 1.25rem;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-base);
}

.process-card:hover {
  transform: translateY(var(--card-hover-translate));
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.24);
}

.process-step {
  margin: 0 0 0.5rem;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.05em;
}

.process-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
}

.process-card p {
  margin: 0;
  color: var(--color-text-muted);
}

/* Proof */
.proof {
  padding: 0 0 var(--space-section);
}

.proof h2 {
  margin: 0 0 1.5rem;
  text-align: center;
  font-size: 1.5rem;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-card-gap);
}

.proof-card {
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-strong);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-base);
}

.proof-card:hover {
  transform: translateY(var(--card-hover-translate));
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.24);
}

.proof-number {
  margin: 0 0 0.35rem;
  color: var(--color-primary);
  font-size: 1.25rem;
  font-weight: 700;
}

.proof-label {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

/* Scenarios */
.scenarios {
  padding: 0 0 var(--space-section);
}

.scenarios h2 {
  margin: 0 0 1.5rem;
  text-align: center;
  font-size: 1.5rem;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-card-gap);
}

.scenario-card {
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface-elevated);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-base);
}

.scenario-card:hover {
  transform: translateY(var(--card-hover-translate));
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.24);
}

.scenario-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
}

.scenario-card p {
  margin: 0;
  color: var(--color-text-muted);
}

/* CTA */
.cta {
  padding: var(--space-section) 0;
  text-align: center;
}

.cta h2 {
  margin: 0 0 0.5rem;
  font-size: 1.5rem;
  color: var(--color-text);
}

.cta p {
  margin: 0 0 1.5rem;
  color: var(--color-text-muted);
}

/* Page hero (inner pages) */
.page-hero {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.page-hero.page-hero-image {
  position: relative;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  min-height: clamp(280px, 40vw, 520px);
  padding: clamp(3.6rem, 7vw, 5.4rem) 0 clamp(2.6rem, 6vw, 4.2rem);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: #08162c;
  border-bottom: 1px solid var(--color-border);
}

.page-hero-bg-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.01);
}

.page-hero-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(
      180deg,
      rgba(4, 16, 38, 0.5) 0%,
      rgba(4, 16, 38, 0.6) 56%,
      rgba(4, 16, 38, 0.75) 100%
    ),
    radial-gradient(circle at 52% 16%, rgba(56, 189, 248, 0.2), transparent 56%);
}

.page-hero.page-hero-image .container {
  position: relative;
  z-index: 2;
  padding-bottom: clamp(0.25rem, 1.8vw, 1.35rem);
}

.page-hero h1 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  color: var(--color-text);
}

.page-hero p {
  margin: 0;
  color: var(--color-text-muted);
}

.page-hero.page-hero-image h1 {
  color: #f8fbff;
  text-shadow: 0 8px 24px rgba(3, 12, 28, 0.52);
}

.page-hero.page-hero-image p {
  color: rgba(241, 245, 249, 0.92);
}

.about-wide-banner {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
  background: #0d1728;
  position: relative;
}

.about-wide-banner-image {
  display: block;
  width: 100%;
  height: clamp(220px, 42vw, 520px);
  object-fit: cover;
  object-position: center;
}

.about-wide-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(
      180deg,
      rgba(6, 18, 38, 0.12) 0%,
      rgba(6, 18, 38, 0.06) 42%,
      rgba(6, 18, 38, 0.18) 72%,
      rgba(6, 18, 38, 0.46) 100%
    );
}

.content-block {
  padding: 2.5rem 0;
}

.content-block.alt {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.content-block h2 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
  color: var(--color-text);
}

.content-block p,
.content-block ul {
  margin: 0 0 1rem;
  color: var(--color-text-muted);
}

.value-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.value-list li {
  margin-bottom: 0.75rem;
  padding-left: 1rem;
  border-left: 3px solid var(--color-primary);
  color: var(--color-text-muted);
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-card-gap);
}

.capability-card {
  padding: 1.25rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface-elevated);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow), border-color var(--transition-base);
}

.capability-card:hover {
  transform: translateY(var(--card-hover-translate));
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.24);
}

.capability-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
}

.capability-card p {
  margin: 0;
  color: var(--color-text-muted);
}

.faq-accordion {
  display: grid;
  gap: 0.9rem;
}

.faq-item {
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  background: var(--color-surface-elevated);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 1rem 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--color-primary);
}

.faq-item[open] summary::after {
  content: "-";
}

.faq-item p {
  margin: 0;
  padding: 0 1.25rem 1rem;
  color: var(--color-text-muted);
}

/* Contact */
.content-block-contact {
  padding-top: 1.5rem;
}

.contact-page-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
  margin-bottom: 2rem;
}

.contact-form-title {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  color: var(--color-text);
}

.contact-note {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin: 0 0 1.25rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.contact-card {
  padding: 1.25rem;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.contact-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.contact-card h3,
.contact-card h4 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.contact-card p {
  margin: 0;
  color: var(--color-text);
}

/* Contact form — 定位為畫面主要輸入區 */
.contact-form-wrap {
  max-width: 100%;
  margin: 0 0 2rem;
  padding: 1.5rem;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  scroll-margin-top: 4rem;
}

@media (min-width: 768px) {
  .contact-form-wrap {
    max-width: 36rem;
    margin: 0 0 2rem;
  }
}

.contact-form-wrap h3 {
  margin: 0 0 1.25rem;
  font-size: 1.25rem;
  color: var(--color-text);
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius);
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.04);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.captcha-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.captcha-group label {
  margin-bottom: 0;
}

.captcha-question {
  font-weight: 600;
  color: var(--color-text);
  padding: 0.35rem 0.5rem;
  background: var(--color-bg);
  border-radius: var(--radius);
}

.captcha-group input {
  width: 5rem;
  text-align: center;
}

.form-actions {
  margin-top: 1.25rem;
}

.form-hint {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.form-hint.block {
  margin-bottom: 1rem;
}

.form-section-title {
  margin: 1.5rem 0 0.75rem;
  font-size: 1.125rem;
  color: var(--color-text);
}

.required-mark {
  color: #dc2626;
}

.admin-notice {
  max-width: 48rem;
  margin: 0 auto 1rem;
  padding: 0.875rem 1rem;
  border: 1px solid var(--color-border-strong);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-lg);
  background: var(--color-surface-elevated);
  box-shadow: var(--shadow-xs);
}

.admin-notice p {
  margin: 0;
  color: var(--color-text-muted);
}

.admin-form-wrap {
  max-width: 32rem;
  margin: 0 auto;
  padding: 1.5rem;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.form-message {
  margin-top: 1rem;
  padding: 0.75rem;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  display: none;
}

.form-message.show {
  display: block;
}

.form-message.success {
  background: #dcfce7;
  color: #166534;
  border: 1px solid #86efac;
}

.form-message.error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

/* Map */
.map-section {
  margin-top: 2rem;
}

.map-section h3 {
  margin: 0 0 0.75rem;
  font-size: 1.125rem;
  color: var(--color-text);
}

.map-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border-strong);
  box-shadow: var(--shadow-md);
  background: var(--color-surface-elevated);
}

.map-wrap iframe {
  display: block;
  width: 100%;
  height: 320px;
  border: 0;
}

.map-link {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.9375rem;
}

/* Footer（與首頁 body 行距一致：line-height 1.6，單一來源 partials/footer-zh.html、footer-en.html） */
.site-footer {
  margin-top: auto;
  padding: 1rem 0;
  border-top: 1px solid var(--footer-border);
  text-align: center;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  background: linear-gradient(180deg, var(--footer-bg-start) 0%, var(--footer-bg-end) 100%);
}

.site-footer p {
  margin: 0 0 0.25em 0;
}

.site-footer p:last-child {
  margin-bottom: 0;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.site-footer a {
  color: var(--color-primary);
}

.footer-brand {
  font-weight: 600;
  color: var(--color-text);
}

.footer-info {
  font-size: 0.9rem;
}

.footer-copy {
  font-size: 0.875rem;
  opacity: 0.9;
}

.footer-ai-note {
  font-size: 0.65rem;
  opacity: 0.55;
  letter-spacing: 0.02em;
}

/* RWD: tablet/mobile nav */
@media (max-width: 1180px) {
  .header-inner {
    display: flex;
    justify-content: space-between;
  }

  .logo-mark {
    width: auto;
    height: var(--logo-mark-height-mobile);
    max-width: none;
    max-height: none;
  }

  .logo {
    gap: 0.5rem;
  }

  .logo-text {
    font-size: var(--logo-text-size-mobile);
  }

  .nav-toggle {
    display: flex;
  }

  .theme-toggle {
    margin-left: auto;
    width: 2.15rem;
    height: 2.15rem;
  }

  .lang-toggle {
    width: 2.15rem;
    height: 2.15rem;
    font-size: 0.72rem;
  }

  .nav {
    flex: initial;
    width: auto;
    position: fixed;
    top: var(--header-min-height);
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
    box-shadow: var(--shadow-lg);
  }

  .nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .nav a {
    display: block;
    padding: 0.625rem 0.5rem;
    border-radius: var(--radius);
    text-align: right;
  }
}

@media (max-width: 640px) {
  .page-hero.page-hero-image,
  .about-wide-banner {
    width: 100%;
    margin-left: 0;
    margin-right: 0;
  }

  .hero {
    padding: var(--space-section-sm) 0 calc(var(--space-section-sm) + 0.75rem);
    min-height: clamp(320px, 88vw, 520px);
  }

  .hero-actions {
    gap: 0.75rem;
  }

  .hero-actions .btn {
    width: min(100%, 18rem);
  }

  .hero .btn-secondary {
    background: rgba(255, 255, 255, 0.96);
    border-color: rgba(255, 255, 255, 0.98);
    color: #020617;
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.22);
  }

  .hero .btn-secondary:hover,
  .hero .btn-secondary:focus-visible {
    background: #ffffff;
    color: #020617;
    border-color: #ffffff;
  }

  .page-hero.page-hero-image {
    min-height: clamp(240px, 78vw, 440px);
    padding: clamp(3rem, 9vw, 4.2rem) 0 clamp(2.1rem, 7vw, 3rem);
  }

  .features,
  .process,
  .proof,
  .scenarios,
  .cta {
    padding-top: var(--space-section-sm);
    padding-bottom: var(--space-section-sm);
  }

  .map-wrap iframe {
    height: 260px;
  }

  .footer-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
  }

  .footer-info .footer-sep {
    display: none;
  }

  .footer-ai-note {
    font-size: 0.58rem;
  }
}

/* 2026-03 homepage refresh */
:root {
  --logo-area-width: 8.2rem;
  --nav-track-gap: 0.4rem;
  --nav-text-size: 0.84rem;
}

.nav a {
  padding: 0.3rem 0.56rem;
}

.hero.hero--split {
  text-align: left;
}

.hero.hero--split .container {
  max-width: 1140px;
}

.hero-layout {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.82fr);
  gap: 2rem;
  align-items: center;
}

.hero-copy {
  max-width: 40rem;
}

.hero.hero--split .hero-tagline {
  margin-left: 0;
  margin-right: 0;
  max-width: 44rem;
}

.hero-surface {
  padding: 1.4rem;
  border: 1px solid rgba(191, 219, 254, 0.24);
  border-radius: 1.25rem;
  background: rgba(8, 19, 43, 0.62);
  box-shadow: 0 28px 64px rgba(2, 10, 24, 0.35);
  backdrop-filter: blur(8px);
}

.hero-surface h2,
.hero-surface h3 {
  margin: 0 0 0.75rem;
  color: #f8fbff;
}

.hero-surface p,
.hero-surface li {
  color: rgba(226, 232, 240, 0.9);
}

.hero-surface p {
  margin: 0 0 1rem;
}

.hero-checklist {
  margin: 0;
  padding-left: 1.1rem;
}

.hero-checklist li + li {
  margin-top: 0.45rem;
}

.hero-stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.hero-stat {
  padding: 0.95rem 1rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(191, 219, 254, 0.16);
}

.hero-stat strong {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 1.15rem;
  color: #ffffff;
}

.hero-stat span {
  display: block;
  font-size: 0.875rem;
  color: rgba(226, 232, 240, 0.88);
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.9rem;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.section-heading {
  max-width: 42rem;
  margin: 0 auto 2rem;
  text-align: center;
}

.section-heading h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.55rem, 2vw, 2.1rem);
}

.section-heading p {
  margin: 0;
  color: var(--color-text-muted);
}

.content-block .section-heading {
  margin-bottom: 1.75rem;
}

.content-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.5rem;
}

.content-panel,
.list-panel,
.faq-category,
.contact-side-panel,
.cta-panel {
  padding: 1.5rem;
  border-radius: 1rem;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.content-panel h3,
.list-panel h3,
.faq-category h3,
.contact-side-panel h3,
.cta-panel h2 {
  margin: 0 0 0.8rem;
}

.check-list,
.plain-list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--color-text-muted);
}

.check-list li + li,
.plain-list li + li {
  margin-top: 0.5rem;
}

.service-detail-grid,
.faq-category-grid,
.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.service-detail-card {
  padding: 1.4rem;
  border-radius: 1rem;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.98));
  border: 1px solid var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

:root[data-theme="dark"] .service-detail-card {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.98), rgba(17, 27, 49, 0.98));
}

.service-detail-card h3 {
  margin: 0 0 0.75rem;
}

.service-detail-card p {
  margin: 0 0 0.85rem;
  color: var(--color-text-muted);
}

.service-detail-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--color-text-muted);
}

.service-detail-card li + li {
  margin-top: 0.45rem;
}

.highlight-band {
  padding: var(--space-section) 0;
  background:
    linear-gradient(180deg, rgba(37, 99, 235, 0.08), rgba(5, 150, 105, 0.03)),
    var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.metric-card {
  padding: 1.25rem;
  border-radius: 1rem;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.metric-card strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1.25rem;
  color: var(--color-primary);
}

.metric-card span {
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

.cta-panel {
  text-align: center;
  max-width: 60rem;
  margin: 0 auto;
  padding: 2rem;
}

.cta-panel p {
  margin: 0 auto 1.25rem;
  max-width: 42rem;
  color: var(--color-text-muted);
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.contact-split {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 1.5rem;
  align-items: start;
}

.contact-side-panel p,
.contact-side-panel li {
  color: var(--color-text-muted);
}

.contact-side-panel ul {
  margin: 0;
  padding-left: 1.1rem;
}

.contact-side-panel li + li {
  margin-top: 0.45rem;
}

.contact-side-panel + .contact-side-panel {
  margin-top: 1rem;
}

.resource-card {
  padding: 1.25rem;
  border-radius: 1rem;
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface-elevated);
  box-shadow: var(--shadow-sm);
}

.resource-card h3 {
  margin: 0 0 0.6rem;
}

.resource-card p {
  margin: 0;
  color: var(--color-text-muted);
}

@media (max-width: 960px) {
  .hero-layout,
  .content-columns,
  .contact-split {
    grid-template-columns: 1fr;
  }

  .hero.hero--split {
    text-align: center;
  }

  .hero.hero--split .hero-tagline {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-copy {
    max-width: none;
  }
}

@media (max-width: 640px) {
  :root {
    --logo-area-width: auto;
  }

  .hero-surface,
  .content-panel,
  .list-panel,
  .faq-category,
  .contact-side-panel,
  .cta-panel,
  .service-detail-card,
  .metric-card,
  .resource-card {
    padding: 1.15rem;
  }

  .hero-stat-grid,
  .metric-grid {
    grid-template-columns: 1fr;
  }
}