/* =========================================================
   Serya — 工程藍圖 (Systems Blueprint) 設計系統  v2.0.0
   品牌色鎖定：#2563EB → #6D28D9，戲劇性來自對比/字體/留白
   ========================================================= */

:root {
  /* 色彩 */
  --blue: #2563EB;
  --blue-700: #1D4ED8;
  --violet: #6D28D9;
  --grad: linear-gradient(135deg, #2563EB 0%, #6D28D9 100%);

  --ink: #0B1220;        /* 標題 近黑帶藍 */
  --ink-2: #243044;
  --body: #3A4555;
  --muted: #6B7280;

  --ground: #FFFFFF;
  --soft: #F5F8FF;       /* 區段交替底 */
  --soft-2: #EEF3FF;

  --line: rgba(15, 23, 42, 0.08);   /* 髮絲線 */
  --line-2: rgba(15, 23, 42, 0.12);

  --success: #059669;
  --success-bg: #D1FAE5;
  --error: #DC2626;
  --error-bg: #FEE2E2;

  /* 字體 */
  --f-display: 'Space Grotesk', 'Noto Sans TC', system-ui, sans-serif;
  --f-body: 'Noto Sans TC', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --f-mono: 'JetBrains Mono', 'Noto Sans TC', ui-monospace, 'SFMono-Regular', monospace;

  /* 間距 / 圓角 / 動效 */
  --r-sm: 8px;
  --r: 12px;
  --r-lg: 16px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --maxw: 1160px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; overflow-x: clip; interpolate-size: allow-keywords; }

body {
  font-family: var(--f-body);
  color: var(--body);
  background: var(--ground);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  counter-reset: secnum; /* 區段自動編號（display:none 的隱藏區段不計入） */
}

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

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

code, .mono { font-family: var(--f-mono); }

/* ---------- 共用：eyebrow / section 標題 ---------- */
.eyebrow {
  font-family: var(--f-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--ink-2);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-transform: uppercase;
}
.eyebrow-num {
  font-weight: 600;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  counter-increment: secnum;
}
.eyebrow-num::before { content: counter(secnum, decimal-leading-zero); }

.section { padding: 96px 0; position: relative; }
.section-soft { background: var(--soft); border-block: 1px solid var(--line); }

.section-head { max-width: 720px; margin-bottom: 56px; }
.section-title {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 1rem + 2.6vw, 2.7rem);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 16px 0 18px;
  text-wrap: balance;
}
.section-lead {
  font-size: clamp(1rem, 0.95rem + 0.3vw, 1.12rem);
  color: var(--muted);
  max-width: 56ch;
  text-wrap: balance;
}
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.br-s { display: none; } /* 只在手機顯示的斷點 */

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--f-body);
  font-weight: 600;
  font-size: 0.98rem;
  padding: 13px 22px;
  border-radius: var(--r-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
  white-space: nowrap;
}
.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.25);
}
.btn-primary:hover { background: var(--blue-700); transform: translateY(-2px); box-shadow: 0 10px 26px rgba(37, 99, 235, 0.32); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); transform: translateY(-2px); }
.btn-line { background: #fff; color: var(--blue); border-color: var(--line-2); font-size: 0.9rem; padding: 11px 18px; }
.btn-line:hover { border-color: var(--blue); transform: translateY(-2px); }

/* =========================================================
   NAV
   ========================================================= */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.navbar .container {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 64px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  margin-right: auto;
}
.nav-logo-img { width: 30px; }
.nav-logo-lockup { display: flex; flex-direction: column; line-height: 1.08; }
.nav-logo-en { font-family: var(--f-display); font-weight: 700; font-size: 1.18rem; letter-spacing: -0.01em; color: var(--ink); }
.nav-logo-zh { font-size: 0.62rem; font-weight: 500; color: var(--muted); letter-spacing: 0.03em; margin-top: 2px; }
.nav-links { display: flex; gap: 28px; }
.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--body);
  position: relative;
  transition: color 0.2s var(--ease);
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0; bottom: -6px;
  width: 100%; height: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.25s var(--ease);
}
.nav-link:hover { color: var(--ink); }
.nav-link:hover::after { transform: scaleX(1); transform-origin: left; }
.nav-cta {
  font-size: 0.92rem;
  font-weight: 600;
  color: #fff;
  background: var(--blue);
  padding: 9px 18px;
  border-radius: var(--r-sm);
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}
.nav-cta:hover { background: var(--blue-700); transform: translateY(-1px); }

/* 漢堡 */
.hamburger-menu { display: none; }
.hamburger-icon {
  width: 26px; height: 18px; position: relative;
  border: none; background: transparent; padding: 0; cursor: pointer;
  z-index: 101;
}
.hamburger-icon span {
  position: absolute; left: 0; height: 2.5px; width: 100%;
  background: var(--ink); border-radius: 3px;
  transition: 0.3s var(--ease);
}
.hamburger-icon span:nth-child(1) { top: 0; }
.hamburger-icon span:nth-child(2) { top: 8px; }
.hamburger-icon span:nth-child(3) { top: 16px; }
.hamburger-icon.open span:nth-child(1) { top: 8px; transform: rotate(135deg); }
.hamburger-icon.open span:nth-child(2) { opacity: 0; transform: translateX(-12px); }
.hamburger-icon.open span:nth-child(3) { top: 8px; transform: rotate(-135deg); }

.mobile-menu {
  position: fixed; top: 0; right: 0;
  width: 78%; max-width: 320px; height: 100vh;
  background: #fff; border-left: 1px solid var(--line);
  box-shadow: -10px 0 40px rgba(11, 18, 32, 0.12);
  transform: translateX(100%);
  visibility: hidden;
  transition: transform 0.32s var(--ease), visibility 0s linear 0.32s; z-index: 100;
  padding-top: 84px;
}
.mobile-menu.open { transform: translateX(0); visibility: visible; transition: transform 0.32s var(--ease), visibility 0s; }
.mobile-menu-close {
  position: absolute; top: 16px; right: 18px;
  width: 42px; height: 42px; border: none; background: transparent; cursor: pointer;
  display: flex; align-items: center; justify-content: center; color: var(--ink);
  border-radius: 8px; transition: background 0.2s var(--ease);
}
.mobile-menu-close:hover { background: var(--soft); }
.mobile-menu-close svg { width: 24px; height: 24px; }
.mobile-menu-container { display: flex; flex-direction: column; padding: 16px 24px; }
.mobile-menu-link {
  font-size: 1.05rem; font-weight: 500; color: var(--ink);
  padding: 16px 0; border-bottom: 1px solid var(--line);
  transition: color 0.2s var(--ease);
}
.mobile-menu-link:hover { color: var(--blue); }
.mobile-menu-cta {
  margin-top: 16px; border: none; color: #fff; background: var(--blue);
  text-align: center; border-radius: var(--r-sm); font-weight: 600;
}
.mobile-menu-cta:hover, .mobile-menu-cta:active, .mobile-menu-cta:focus {
  color: #fff; background: var(--blue-700);
}
.menu-overlay {
  position: fixed; inset: 0; background: rgba(11, 18, 32, 0.5);
  opacity: 0; visibility: hidden; transition: opacity 0.3s var(--ease); z-index: 99;
}
.menu-overlay.open { opacity: 1; visibility: visible; }
body.menu-open { overflow: hidden; }

/* =========================================================
   HERO
   ========================================================= */
.hero { position: relative; overflow: hidden; padding: clamp(56px, 6vw, 104px) 0 clamp(48px, 5vw, 88px); }
.hero-grid {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(120% 80% at 70% 0%, #000 0%, transparent 70%);
  mask-image: radial-gradient(120% 80% at 70% 0%, #000 0%, transparent 70%);
  opacity: 0.7;
}
.hero-glow {
  position: absolute; z-index: 0; pointer-events: none;
  top: -180px; right: -120px; width: 620px; height: 620px;
  background: var(--grad);
  opacity: 0.12; filter: blur(90px); border-radius: 50%;
}
.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.25fr 0.85fr; gap: 56px; align-items: center;
}
.hero-copy .eyebrow { margin-bottom: 22px; }
.hero-title {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 1.2rem + 4.6vw, 4.2rem);
  line-height: 1.06;
  letter-spacing: -0.035em;
  color: var(--ink);
  position: relative;
}
.ribbon {
  display: block; width: 120px; height: 6px; margin-top: 20px;
  background: var(--grad); border-radius: 6px;
}
.hero-sub {
  margin-top: 26px; max-width: 46ch;
  font-size: clamp(1.02rem, 0.96rem + 0.4vw, 1.18rem);
  color: var(--ink-2); text-wrap: balance;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero-stats {
  list-style: none; display: grid; grid-template-columns: repeat(4, auto);
  gap: 32px; margin-top: 48px; padding-top: 28px; border-top: 1px solid var(--line);
}
.hero-stats li { display: flex; flex-direction: column; }
.hero-stats strong {
  font-family: var(--f-display); font-weight: 700; font-size: 1.9rem; color: var(--ink); line-height: 1;
}
.hero-stats strong span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-stats em { font-style: normal; font-size: 0.82rem; color: var(--muted); margin-top: 7px; }

/* Hero 右側規格面板 */
.hero-spec {
  background: #fff; border: 1px solid var(--line-2); border-radius: var(--r-lg);
  box-shadow: 0 24px 60px -24px rgba(37, 99, 235, 0.28);
  overflow: hidden;
}
.spec-head {
  display: flex; align-items: center; gap: 7px;
  padding: 14px 18px; border-bottom: 1px solid var(--line); background: var(--soft);
}
.spec-head .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--line-2); }
.spec-head code { margin-left: 8px; font-size: 12px; color: var(--muted); }
.spec-list { list-style: none; padding: 8px 0; }
.spec-list li {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 18px; border-bottom: 1px dashed var(--line);
}
.spec-list li:last-child { border-bottom: none; }
.spec-list code { color: var(--ink); font-weight: 600; font-size: 0.98rem; }
.spec-list span {
  font-family: var(--f-mono); font-size: 12px; color: var(--muted);
  letter-spacing: 0.02em; text-align: right;
}
.spec-stack { padding: 14px 18px; border-top: 1px solid var(--line); background: var(--soft); }
.spec-stack code { font-size: 11.5px; color: var(--muted); letter-spacing: 0.02em; }

/* =========================================================
   ABOUT / TEAM
   ========================================================= */
.team-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; max-width: 840px; }
.team-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 28px; transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.team-card:hover { transform: translateY(-4px); border-color: rgba(37, 99, 235, 0.3); box-shadow: 0 18px 40px -22px rgba(37, 99, 235, 0.35); }
.monogram {
  width: 50px; height: 50px; border-radius: 12px; background: var(--grad);
  color: #fff; font-family: var(--f-display); font-weight: 700; font-size: 1.5rem;
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
}
.monogram svg { width: 26px; height: 26px; }
.team-card h3 { font-family: var(--f-display); font-size: 1.25rem; color: var(--ink); font-weight: 700; letter-spacing: -0.01em; }
.team-role { font-family: var(--f-display); font-size: 0.92rem; font-weight: 500; color: var(--blue); margin-top: 4px; }
.team-meta { margin: 12px 0; }
.team-meta code {
  font-size: 12px; color: var(--blue); background: rgba(37, 99, 235, 0.08);
  padding: 3px 10px; border-radius: 6px;
}
.team-card p { font-size: 0.95rem; color: var(--muted); }
.team-bg {
  margin-top: 28px; padding: 20px 24px; max-width: 840px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
}
.team-bg-label code { font-family: var(--f-mono); font-size: 12px; color: var(--blue); white-space: nowrap; }
.team-bg .chips { flex: 1; }
.team-note { margin-top: 18px; font-size: 0.85rem; color: var(--muted); font-family: var(--f-body); }

/* =========================================================
   理念 PULL-QUOTE（深色 manifesto 雙引言）
   ========================================================= */
.quote-band { position: relative; overflow: hidden; background: var(--ink); color: #fff; padding: clamp(72px, 9vw, 120px) 0; }
.qb-grid {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(120% 100% at 50% 0%, #000, transparent 75%);
  mask-image: radial-gradient(120% 100% at 50% 0%, #000, transparent 75%);
}
.qb-glow {
  position: absolute; z-index: 0; pointer-events: none;
  top: -180px; left: 50%; transform: translateX(-50%);
  width: 760px; height: 520px; background: var(--grad);
  opacity: 0.22; filter: blur(120px); border-radius: 50%;
}
.quote-band .container { position: relative; z-index: 1; }
.qb-eyebrow { text-align: center; margin-bottom: 50px; }
.qb-eyebrow code { font-family: var(--f-mono); font-size: 13px; letter-spacing: 0.08em; color: rgba(255,255,255,0.5); text-transform: uppercase; }
.qb-quotes { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; max-width: 1000px; margin: 0 auto; }
.qb-item .ribbon { margin: 0 0 24px; width: 64px; height: 5px; }
.qb-item .quote {
  font-family: var(--f-display); font-weight: 600;
  font-size: clamp(1.22rem, 0.9rem + 1.1vw, 1.62rem);
  line-height: 1.55; letter-spacing: -0.01em; color: #EDF1FA; text-wrap: pretty;
}
.qb-item .quote-by { margin-top: 22px; }
.qb-item .quote-by code { font-family: var(--f-mono); font-size: 0.85rem; color: rgba(255,255,255,0.5); }
.quote-band .grad-text { background: linear-gradient(135deg, #7DA8FF, #B794FF); -webkit-background-clip: text; background-clip: text; color: transparent; }
@media (max-width: 760px) { .qb-quotes { grid-template-columns: 1fr; gap: 40px; } }

/* =========================================================
   SERVICES
   ========================================================= */
.service-group { margin-top: 40px; }
.service-group:first-of-type { margin-top: 0; }
.service-group-head { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.service-group-head code {
  font-family: var(--f-mono); font-weight: 600; font-size: 13px; color: #fff;
  background: var(--grad); width: 26px; height: 26px; border-radius: 7px;
  display: inline-flex; align-items: center; justify-content: center;
}
.service-group-head h3 { font-family: var(--f-display); font-size: 1.15rem; color: var(--ink); font-weight: 600; }
.service-group-head .rule { flex: 1; height: 1px; background: var(--line); }

.service-note { margin-top: 28px; font-size: 0.85rem; color: var(--muted); max-width: 60ch; text-wrap: balance; }
.cards-container { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.service-advisory .cards-container { grid-template-columns: repeat(3, 1fr); }
.service-dev .cards-container { grid-template-columns: repeat(4, 1fr); }

.card {
  position: relative; overflow: hidden;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 26px 24px; cursor: pointer;
  display: flex; flex-direction: column; gap: 8px;
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.card::before {
  content: ''; position: absolute; left: 0; top: 0; height: 3px; width: 100%;
  background: var(--grad); transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.card:hover { transform: translateY(-5px); border-color: rgba(37, 99, 235, 0.32); box-shadow: 0 22px 44px -24px rgba(37, 99, 235, 0.4); }
.card:hover::before { transform: scaleX(1); }
.card-icon {
  width: 50px; height: 50px; border-radius: 12px;
  background: rgba(37, 99, 235, 0.08); color: var(--blue);
  display: flex; align-items: center; justify-content: center; margin-bottom: 8px;
  transition: background 0.25s var(--ease), transform 0.25s var(--ease);
}
.card-icon svg { width: 26px; height: 26px; }
.card:hover .card-icon { background: var(--grad); color: #fff; transform: scale(1.06); }
.card-title-cn { font-family: var(--f-display); font-size: 1.12rem; font-weight: 600; color: var(--ink); }
.card-title-en { font-family: var(--f-mono); font-size: 0.78rem; color: var(--blue); letter-spacing: 0.02em; }
.card-description { font-size: 0.92rem; color: var(--muted); margin-top: 6px; }
.card-hint {
  margin-top: auto; padding-top: 14px; font-family: var(--f-mono); font-size: 0.78rem; color: var(--blue);
  opacity: 0; transform: translateY(6px); transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
}
.card:hover .card-hint { opacity: 1; transform: translateY(0); }
.card-ripple {
  position: absolute; top: 50%; left: 50%; width: 6px; height: 6px;
  background: rgba(37, 99, 235, 0.35); border-radius: 50%;
  transform: translate(-50%, -50%); pointer-events: none;
  animation: ripple 0.6s ease-out;
}
@keyframes ripple { to { transform: translate(-50%, -50%) scale(46); opacity: 0; } }
.card-clicked { animation: cardPulse 0.4s var(--ease); }
@keyframes cardPulse { 50% { transform: translateY(-5px) scale(0.98); } }

/* =========================================================
   PACKAGES
   ========================================================= */
.packages-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.package {
  position: relative; display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 28px;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}
.package:hover { transform: translateY(-5px); box-shadow: 0 24px 50px -28px rgba(37, 99, 235, 0.4); }
.package-featured { border-color: transparent; box-shadow: 0 0 0 2px var(--blue), 0 30px 60px -30px rgba(37, 99, 235, 0.5); }
.package-tag {
  position: absolute; top: -12px; left: 28px;
  font-family: var(--f-mono); font-size: 11px; font-weight: 600; color: #fff;
  background: var(--grad); padding: 5px 12px; border-radius: 999px; letter-spacing: 0.03em;
}
.package-head code { font-family: var(--f-mono); font-size: 12px; color: var(--muted); }
.package-head h3 { font-family: var(--f-display); font-size: 1.35rem; color: var(--ink); font-weight: 600; margin-top: 8px; }
.package-en { font-family: var(--f-mono); font-size: 0.8rem; color: var(--blue); margin-top: 2px; }
.package-list { list-style: none; margin: 22px 0; display: flex; flex-direction: column; gap: 12px; }
.package-list li { position: relative; padding-left: 26px; font-size: 0.95rem; color: var(--ink-2); }
.package-list li::before {
  content: ''; position: absolute; left: 0; top: 8px; width: 14px; height: 8px;
  border-left: 2px solid var(--blue); border-bottom: 2px solid var(--blue);
  transform: rotate(-45deg);
}
.package-foot { margin-top: auto; padding-top: 18px; border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 14px; align-items: flex-start; }
.package-for { font-size: 0.82rem; color: var(--muted); }
.package-foot .btn { width: 100%; }

/* =========================================================
   PROCESS（漸層絲帶主軸）
   ========================================================= */
.process {
  list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  position: relative; counter-reset: step;
}
.process::before {
  content: ''; position: absolute; top: 22px; left: 6%; right: 6%; height: 2px;
  background: var(--grad); opacity: 0.4; z-index: 0;
}
.process-step { position: relative; z-index: 1; }
.process-num {
  width: 46px; height: 46px; border-radius: 12px; background: #fff;
  border: 1px solid var(--line-2);
  font-family: var(--f-mono); font-weight: 600; font-size: 1.05rem;
  color: var(--blue);
  display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
}
.process-step:hover .process-num { background: var(--grad); color: #fff; border-color: transparent; }
.process-step h3 { font-family: var(--f-display); font-size: 1.12rem; color: var(--ink); font-weight: 600; margin-bottom: 8px; }
.process-step p { font-size: 0.92rem; color: var(--muted); }

/* =========================================================
   TECH
   ========================================================= */
.tech-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.tech-group {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 24px 26px;
}
.tech-label { margin-bottom: 16px; }
.tech-label code {
  font-family: var(--f-mono); font-size: 12px; color: var(--muted);
  text-transform: uppercase; letter-spacing: 0.05em;
}
.tech-label code::before { content: '// '; color: var(--blue); }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  font-family: var(--f-mono); font-size: 0.85rem; color: var(--ink-2);
  background: var(--soft); border: 1px solid var(--line); border-radius: 8px;
  padding: 7px 13px; transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}
.chip:hover { color: var(--blue); border-color: rgba(37, 99, 235, 0.35); background: rgba(37, 99, 235, 0.06); }

/* =========================================================
   CASES（資料驅動）
   ========================================================= */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}
.case-card:hover { transform: translateY(-5px); box-shadow: 0 24px 50px -28px rgba(37, 99, 235, 0.4); }
.case-thumb { aspect-ratio: 16/10; background: var(--soft-2); display: flex; align-items: center; justify-content: center; color: var(--muted); font-family: var(--f-mono); font-size: 0.8rem; }
.case-body { padding: 22px 24px; }
.case-body h3 { font-family: var(--f-display); font-size: 1.1rem; color: var(--ink); font-weight: 600; margin-bottom: 8px; }
.case-tag { font-family: var(--f-mono); font-size: 11px; color: var(--blue); }
.case-body p { font-size: 0.92rem; color: var(--muted); margin-top: 8px; }

/* =========================================================
   FAQ
   ========================================================= */
.faq { max-width: 800px; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  list-style: none; cursor: pointer; padding: 22px 44px 22px 0; position: relative;
  font-family: var(--f-display); font-size: 1.08rem; font-weight: 500; color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+'; position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  font-family: var(--f-mono); font-size: 1.4rem; color: var(--blue); transition: transform 0.25s var(--ease);
}
.faq-item summary::after { transition: transform 0.25s var(--ease); }
.faq-item[open] summary::after { content: '−'; }
/* 取消 <details> 原生用 content-visibility 隱藏內容（那會造成展開閃爍）；
   改完全由 .faq-a 的高度控制隱藏/展開，JS 做動畫（見 main.js）。 */
.faq-item::details-content { content-visibility: visible; }
.faq-a {
  height: 0; overflow: hidden;
  transition: height 0.45s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.38s ease, transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}
.faq-a-in { padding: 0 44px 24px 0; color: var(--muted); font-size: 0.97rem; text-wrap: pretty; }
.faq-item[open] .faq-a { height: auto; }
@media (prefers-reduced-motion: reduce) {
  .faq-a { transition: none; }
}

/* =========================================================
   CONTACT（保留原表單行為，重配外觀）
   ========================================================= */
.contact-card {
  max-width: 620px; background: #fff;
  border: 1px solid var(--line); border-radius: var(--r-lg); padding: 36px;
  box-shadow: 0 30px 70px -40px rgba(37, 99, 235, 0.35);
}
.form-messages:empty { display: none; }
.success-message, .error-message {
  display: none; align-items: center; gap: 8px;
  padding: 12px 16px; border-radius: var(--r-sm); margin-bottom: 16px;
}
.success-message { background: var(--success-bg); color: var(--success); }
.error-message { background: var(--error-bg); color: var(--error); }
.message-icon { width: 16px; height: 16px; fill: currentColor; flex-shrink: 0; }

#contactForm { display: flex; flex-direction: column; gap: 14px; }
#contactForm input, #contactForm textarea {
  font-family: var(--f-body); font-size: 1rem; color: var(--ink);
  padding: 13px 15px; border: 1px solid var(--line-2); border-radius: var(--r-sm);
  background: #fff; transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
#contactForm input::placeholder, #contactForm textarea::placeholder { color: #9AA3B2; }
#contactForm textarea { min-height: 130px; resize: vertical; }
#contactForm input:focus, #contactForm textarea:focus {
  outline: none; border-color: var(--blue); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}
#submitButton {
  position: relative; overflow: hidden;
  font-family: var(--f-body); font-weight: 600; font-size: 1.05rem; color: #fff;
  background: var(--blue); border: none; border-radius: var(--r-sm); padding: 15px 0; cursor: pointer;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
}
#submitButton:hover { background: var(--blue-700); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(37, 99, 235, 0.32); }
#submitButton:disabled { opacity: 0.7; cursor: not-allowed; transform: none; }
.button-loader {
  display: none; width: 20px; height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.35); border-top-color: #fff; border-radius: 50%;
  position: absolute; top: 50%; left: 50%; margin: -10px 0 0 -10px; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
#submitButton.loading .button-loader { display: inline-block; }
#submitButton.loading span { visibility: hidden; }
.contact-info { margin-top: 22px; font-size: 0.9rem; color: var(--muted); line-height: 1.8; text-align: center; }
.contact-info a { color: var(--blue); }
.contact-info a:hover { text-decoration: underline; }

/* =========================================================
   FOOTER
   ========================================================= */
footer { border-top: 1px solid var(--line); background: var(--soft); padding: 48px 0; }
.footer-content { display: flex; flex-direction: column; align-items: center; gap: 22px; text-align: center; }
.footer-logo { display: flex; align-items: center; gap: 8px; font-family: var(--f-display); font-weight: 700; font-size: 1.2rem; color: var(--ink); }
.footer-logo-img { width: 28px; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 24px; }
.footer-links a { font-size: 0.92rem; color: var(--muted); transition: color 0.2s var(--ease); }
.footer-links a:hover { color: var(--blue); }
.footer-copyright { font-size: 0.85rem; color: var(--muted); }

/* =========================================================
   SweetAlert2 自訂（serya-modal）
   ========================================================= */
.serya-modal { border-radius: var(--r-lg) !important; font-family: var(--f-body) !important; }
.serya-modal .modal-icon {
  width: 54px; height: 54px; border-radius: 13px; background: var(--grad); color: #fff;
  display: flex; align-items: center; justify-content: center; margin: 0 auto 10px;
}
.serya-modal .modal-icon svg { width: 28px; height: 28px; }
.serya-modal .modal-description { color: var(--body); margin-bottom: 18px; font-size: 0.96rem; }
.serya-modal .modal-label { font-family: var(--f-mono); font-size: 12px; color: var(--blue); letter-spacing: 0.04em; margin-bottom: 10px; }
.serya-modal .modal-label::before { content: '// '; }
.serya-modal .modal-fit {
  margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--line-2);
  font-size: 0.9rem; color: var(--muted); display: flex; align-items: center; gap: 8px;
}
.serya-modal .modal-fit span {
  font-family: var(--f-mono); font-size: 11px; color: var(--violet);
  background: rgba(109,40,217,0.08); padding: 3px 10px; border-radius: 999px;
}
.serya-modal ul { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.serya-modal ul li { display: flex; gap: 10px; align-items: flex-start; font-size: 0.92rem; color: var(--ink-2); }
.serya-modal ul li svg { flex-shrink: 0; margin-top: 3px; }
.swal2-confirm { background: var(--blue) !important; border-radius: var(--r-sm) !important; font-weight: 600 !important; font-family: var(--f-body) !important; }

/* =========================================================
   進場動畫（scroll reveal）
   ========================================================= */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s var(--ease), transform 0.6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* =========================================================
   RWD
   ========================================================= */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-spec { max-width: 460px; }
  .cards-container,
  .service-advisory .cards-container,
  .service-dev .cards-container { grid-template-columns: repeat(2, 1fr); }
  .packages-grid { grid-template-columns: 1fr; max-width: 460px; }
  .process { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .process::before { display: none; }
  .tech-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .section { padding: 72px 0; }
  .nav-links, .nav-cta { display: none; }
  .hamburger-menu { display: flex; align-items: center; }
  .team-grid { grid-template-columns: 1fr; max-width: 420px; }
  .cases-grid { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 22px; }
}

@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .cards-container,
  .service-advisory .cards-container,
  .service-dev .cards-container { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr; }
  .contact-card { padding: 24px 18px; }
  .br-m { display: none; }
  .br-s { display: inline; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}