/* ==========================================================================
   錦寓機電股份有限公司 ｜一頁式官網
   設計風格：穩重、傳統、簡潔有力
   色彩系統：深海軍藍 + 暖米白 + 琥珀金
   字體：思源宋體（H1/H2）+ 思源黑體（內文）+ Inter（數字／英文）
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  /* 色彩 */
  --brand-navy:       #0E2A47;
  --brand-navy-deep:  #081A2E;
  --ink-700:          #2A3340;
  --ink-500:          #5A6772;
  --ink-300:          #8A95A0;
  --paper:            #F5F1EA;
  --paper-deep:       #EBE5D8;
  --paper-card:       #FFFFFF;
  --accent-amber:     #B8893A;
  --accent-amber-dk:  #9B7330;
  --line:             #D9D3C6;
  --line-dark:        rgba(255,255,255,0.15);

  /* 字體 */
  --font-serif: "Noto Serif TC", "Songti TC", "PingFang TC", serif;
  --font-sans:  "Noto Sans TC", "PingFang TC", "Helvetica Neue", Arial, sans-serif;
  --font-num:   "Inter", "Noto Sans TC", sans-serif;

  /* 間距 */
  --gap-xs:  8px;
  --gap-sm:  16px;
  --gap-md:  24px;
  --gap-lg:  32px;
  --gap-xl:  48px;
  --gap-2xl: 80px;
  --gap-3xl: 120px;

  /* 容器 */
  --container: 1200px;

  /* Radius（克制使用） */
  --r-btn: 4px;
  --r-card: 6px;

  /* 陰影（克制使用） */
  --shadow-card: 0 1px 0 rgba(14,42,71,.04), 0 8px 24px -12px rgba(14,42,71,.08);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-700);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { display: block; max-width: 100%; height: auto; }
button { font: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }
ul, ol, dl { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; line-height: 1.3; color: var(--brand-navy); }

/* ---------- Container ---------- */
.container {
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
}

/* ---------- 共用：區段標頭 ---------- */
.section { padding: var(--gap-3xl) 0; }
.section--about    { background: var(--paper); }
.section--services { background: var(--paper-deep); }
.section--process  { background: var(--paper); }
.section--cases    { background: var(--paper-deep); }
.section--certs    { background: var(--paper); }
.section--contact  { background: var(--paper-deep); }

.section__head { text-align: center; margin-bottom: var(--gap-2xl); }
.section__kicker {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-amber);
  margin-bottom: var(--gap-sm);
}
.section__kicker--light { color: rgba(255,255,255,0.65); }
.section__title {
  font-family: var(--font-serif);
  font-size: clamp(32px, 4.2vw, 48px);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--brand-navy);
}
.section__subtitle {
  max-width: 640px;
  margin: var(--gap-md) auto 0;
  font-size: 17px;
  color: var(--ink-500);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: var(--r-btn);
  border: 1px solid transparent;
  transition: background 150ms ease, color 150ms ease, border-color 150ms ease;
  white-space: nowrap;
}
.btn--lg { padding: 16px 32px; font-size: 16px; }
.btn--block { width: 100%; }

.btn--primary {
  background: var(--accent-amber);
  color: #fff;
}
.btn--primary:hover { background: var(--accent-amber-dk); }

.btn--ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.55);
}
.btn--ghost:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
}


/* ==========================================================================
   導覽列
   ========================================================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 241, 234, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap-lg);
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
  height: 72px;
}
.nav__brand {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.nav__brand-name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--brand-navy);
  letter-spacing: 0.04em;
}
.nav__brand-sub {
  margin-top: 4px;
  font-family: var(--font-num);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--ink-500);
}
.nav__menu {
  display: flex;
  gap: var(--gap-lg);
  margin-left: auto;
  margin-right: var(--gap-lg);
}
.nav__menu a {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-700);
  position: relative;
  padding: 10px 0;
}
.nav__menu a::after {
  content: "";
  position: absolute; left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--accent-amber);
  transition: width 200ms ease;
}
.nav__menu a:hover { color: var(--brand-navy); }
.nav__menu a:hover::after { width: 100%; }

.nav__toggle {
  display: none;
  width: 44px; height: 44px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--r-btn);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav__toggle span {
  display: block;
  width: 20px; height: 2px;
  background: var(--brand-navy);
  transition: transform 200ms ease, opacity 200ms ease;
}
.nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav__mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: var(--gap-md) 24px var(--gap-lg);
  background: var(--paper);
  border-top: 1px solid var(--line);
}
.nav__mobile a {
  padding: 14px 4px;
  font-size: 16px;
  font-weight: 500;
  border-bottom: 1px solid var(--line);
  color: var(--ink-700);
}
.nav__mobile a.btn {
  margin-top: var(--gap-sm);
  border-bottom: none;
  text-align: center;
}


/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  min-height: clamp(620px, 92vh, 880px);
  overflow: hidden;
  isolation: isolate;
  color: #fff;
}
.hero__bg {
  position: absolute; inset: 0;
  background: url("images/hero.jpg") center 30% / cover no-repeat;
  z-index: -2;
  transform: scale(1.02);
}
.hero__overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg,
      rgba(8,26,46,0.45) 0%,
      rgba(8,26,46,0.20) 30%,
      rgba(8,26,46,0.55) 70%,
      rgba(8,26,46,0.92) 100%);
  z-index: -1;
}
.hero__content {
  width: min(var(--container), 100% - 48px);
  margin-inline: auto;
  padding-top: clamp(80px, 14vh, 160px);
  padding-bottom: clamp(140px, 20vh, 200px);
  max-width: 900px;
}
.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(40px, 7vw, 80px);
  font-weight: 700;
  line-height: 1.15;
  color: #fff;
  letter-spacing: 0.02em;
  text-shadow: 0 2px 16px rgba(0,0,0,0.25);
}
.hero__subtitle {
  margin-top: var(--gap-lg);
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: rgba(255,255,255,0.92);
}
.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-sm);
  margin-top: var(--gap-xl);
}

/* 桌機 hero 隱藏小手機才需要的 br */
.hide-mobile { display: inline; }


/* ==========================================================================
   區段 2：關於我們
   ========================================================================== */
.about__grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--gap-2xl);
  align-items: center;
}
.about__copy .section__kicker { color: var(--accent-amber); }
.about__copy .section__title { text-align: left; }
.about__lead {
  margin-top: var(--gap-md);
  font-size: 17px;
  line-height: 1.9;
  color: var(--ink-700);
}
.about__photo img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card);
}

.values {
  margin-top: var(--gap-xl);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-md);
  padding-top: var(--gap-lg);
  border-top: 1px solid var(--line);
}
.value__icon {
  width: 32px; height: 32px;
  color: var(--brand-navy);
  stroke-width: 1.5;
}
.value__title {
  margin-top: var(--gap-sm);
  font-size: 17px;
  font-weight: 700;
  color: var(--brand-navy);
}
.value__desc {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-500);
}


/* ==========================================================================
   區段 3：服務項目
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-md);
}
.service-card {
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: var(--gap-lg);
  transition: border-color 200ms ease, transform 200ms ease, box-shadow 200ms ease;
}
.service-card:hover {
  border-color: var(--brand-navy);
  box-shadow: var(--shadow-card);
}
.service-card__icon {
  width: 44px; height: 44px;
  color: var(--brand-navy);
  stroke-width: 1.5;
}
.service-card__title {
  margin-top: var(--gap-md);
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--brand-navy);
}
.service-card__title small {
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-amber);
}
.service-card__list {
  margin-top: var(--gap-md);
  padding-top: var(--gap-md);
  border-top: 1px solid var(--line);
}
.service-card__list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-700);
}
.service-card__list li::before {
  content: "";
  position: absolute;
  left: 0; top: 14px;
  width: 8px; height: 1px;
  background: var(--accent-amber);
}


/* ==========================================================================
   區段 4：品質控管實證（深底）
   ========================================================================== */
.section--qc {
  background: var(--brand-navy-deep);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.section--qc::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 80% 10%, rgba(184,137,58,0.10), transparent 50%),
    radial-gradient(circle at 10% 90%, rgba(184,137,58,0.06), transparent 50%);
  pointer-events: none;
}
.qc__inner { position: relative; }
.qc__head { text-align: center; margin-bottom: var(--gap-2xl); }
.qc__title {
  font-family: var(--font-serif);
  font-size: clamp(30px, 4.4vw, 52px);
  font-weight: 700;
  color: #fff;
  line-height: 1.35;
  letter-spacing: 0.02em;
}
.qc__subtitle {
  margin-top: var(--gap-md);
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-amber);
}

.qc__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap-md);
}
.qc__item {
  margin: 0;
  position: relative;
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--r-card);
  overflow: hidden;
  background: rgba(0,0,0,0.2);
}
.qc__item img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}

.qc__statement {
  margin: var(--gap-2xl) auto 0;
  max-width: 720px;
  text-align: center;
  font-size: 17px;
  line-height: 1.9;
  color: rgba(255,255,255,0.82);
  padding-top: var(--gap-lg);
  border-top: 1px solid rgba(255,255,255,0.12);
}


/* ==========================================================================
   區段 5：服務流程
   ========================================================================== */
.process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--gap-sm);
  position: relative;
}
.process::before {
  content: "";
  position: absolute;
  top: 32px;
  left: 8%; right: 8%;
  height: 1px;
  background: var(--line);
  z-index: 0;
}
.process__step {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 8px;
}
.process__num {
  width: 64px; height: 64px;
  margin: 0 auto;
  display: grid;
  place-items: center;
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  color: var(--accent-amber);
  background: var(--paper);
  border: 1px solid var(--accent-amber);
  border-radius: 50%;
}
.process__title {
  margin-top: var(--gap-md);
  font-size: 18px;
  font-weight: 700;
  color: var(--brand-navy);
}
.process__desc {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-500);
}


/* ==========================================================================
   區段 6：實績案例
   ========================================================================== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gap-lg);
}
.cases-grid--single {
  grid-template-columns: 1fr;
  max-width: 1080px;
  margin-inline: auto;
}
.cases-grid--single .case-card--featured {
  grid-column: auto;
}
.case-card {
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}
.case-card:hover {
  border-color: var(--brand-navy);
  box-shadow: var(--shadow-card);
}
.case-card--featured {
  grid-column: span 2;
  flex-direction: row;
}
.case-card__photo {
  background: var(--paper-deep);
  overflow: hidden;
}
.case-card__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}
.case-card--featured .case-card__photo {
  flex: 1 1 50%;
  min-height: 360px;
}
.case-card--featured .case-card__photo img {
  height: 100%;
  aspect-ratio: auto;
}
.case-card__body {
  padding: var(--gap-lg);
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
  flex: 1;
}
.case-card--featured .case-card__body {
  flex: 1 1 50%;
  justify-content: center;
  padding: var(--gap-xl);
}
.case-card__tag {
  align-self: flex-start;
  display: inline-block;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent-amber);
  background: rgba(184,137,58,0.10);
  border: 1px solid rgba(184,137,58,0.30);
  border-radius: var(--r-btn);
}
.case-card__title {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--brand-navy);
  line-height: 1.4;
}
.case-card--featured .case-card__title { font-size: 28px; }
.case-card__meta {
  margin: 0;
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 6px var(--gap-md);
  font-size: 14px;
}
.case-card__meta dt {
  color: var(--ink-500);
  letter-spacing: 0.1em;
}
.case-card__meta dd {
  margin: 0;
  color: var(--ink-700);
  font-weight: 500;
}


/* ==========================================================================
   區段 7：證照
   ========================================================================== */
.certs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap-md);
}
.cert {
  background: var(--paper-card);
  border: 1px dashed var(--line);
  border-radius: var(--r-card);
  padding: var(--gap-lg);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  transition: border-color 200ms ease, background 200ms ease;
}
.cert:hover {
  border-color: var(--accent-amber);
  border-style: solid;
  background: #fff;
}
.cert__icon {
  width: 32px; height: 32px;
  color: var(--ink-300);
  stroke-width: 1.5;
}
.cert:hover .cert__icon { color: var(--accent-amber); }
.cert__name {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--brand-navy);
  margin-top: 4px;
}
.cert__hint {
  font-size: 12px;
  color: var(--ink-300);
  letter-spacing: 0.05em;
}


/* ==========================================================================
   區段 7：聯絡我們（LINE 大 CTA + Google Map）
   ========================================================================== */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: var(--gap-xl);
  align-items: stretch;
  min-height: 480px;
}

/* 左：LINE 大 CTA 卡 */
.contact__line {
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: var(--gap-2xl) var(--gap-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.contact__line::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-amber), var(--accent-amber-dk));
}
.contact__line-icon {
  width: 56px; height: 56px;
  color: var(--accent-amber);
  stroke-width: 1.5;
  margin-bottom: var(--gap-md);
}
.contact__line-label {
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-500);
}
.contact__line-id {
  margin-top: 6px;
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 700;
  color: var(--brand-navy);
  letter-spacing: 0.04em;
}
.contact__line-desc {
  margin: var(--gap-md) auto var(--gap-lg);
  max-width: 360px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-500);
}
.contact__line .btn {
  max-width: 360px;
  width: 100%;
}
.contact__line .btn i {
  width: 20px;
  height: 20px;
  stroke-width: 2;
}
.contact__line-addr {
  margin-top: var(--gap-lg);
  padding-top: var(--gap-lg);
  border-top: 1px solid var(--line);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  color: var(--ink-700);
}
.contact__line-addr i {
  width: 16px;
  height: 16px;
  color: var(--accent-amber);
  stroke-width: 1.5;
}

/* 右：Google Map */
.contact__map {
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  overflow: hidden;
  background: var(--paper-deep);
  min-height: 480px;
}
.contact__map iframe {
  display: block;
  width: 100%;
  height: 100%;
}


/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: var(--brand-navy-deep);
  color: rgba(255,255,255,0.7);
  padding: var(--gap-2xl) 0 calc(var(--gap-lg) + env(safe-area-inset-bottom));
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: var(--gap-xl);
  align-items: start;
}
.footer__name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: #fff;
}
.footer__sub {
  margin-top: 6px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: rgba(255,255,255,0.45);
}
.footer__contact li {
  margin-bottom: 8px;
  font-size: 14px;
  line-height: 1.8;
}
.footer__contact a {
  color: rgba(255,255,255,0.85);
  display: inline-block;
  padding: 6px 0;
}
.footer__contact a:hover { color: var(--accent-amber); }

.footer__legal {
  font-size: 12px;
  line-height: 1.8;
  color: rgba(255,255,255,0.45);
  border-top: 1px solid rgba(255,255,255,0.08);
  grid-column: 1 / -1;
  padding-top: var(--gap-md);
  margin-top: var(--gap-md);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--gap-sm);
}
.footer__credit a {
  color: rgba(255,255,255,0.65);
  border-bottom: 1px dotted rgba(255,255,255,0.3);
}


/* ==========================================================================
   Scroll Reveal（區段標題淡入）
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms ease, transform 600ms ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}


/* ==========================================================================
   響應式
   斷點：1200 / 1024 / 768 / 480 + landscape + reduced-motion
   ========================================================================== */


/* ≤ 1200｜中型筆電（14 吋 Mac、Surface 等）斷層處理 */
@media (max-width: 1200px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .hero__title { font-size: clamp(40px, 6vw, 64px); }
}


/* ≤ 1024 平板 */
@media (max-width: 1024px) {
  .section { padding: var(--gap-2xl) 0; }
  .section__head { margin-bottom: var(--gap-xl); }

  .section--cases { padding-bottom: var(--gap-2xl); }
  .section--contact { padding-top: var(--gap-2xl); }

  /* About */
  .about__grid { grid-template-columns: 1fr; gap: var(--gap-xl); }
  .about__photo img { aspect-ratio: 16/10; }
  .values { grid-template-columns: repeat(3, 1fr); gap: var(--gap-sm); }

  /* Services 維持 2 欄（從 1200 繼承） */
  .services-grid { grid-template-columns: repeat(2, 1fr); }

  /* Process：橫向時間軸 → 直向 */
  /* 關鍵：3 個 children (num/title/desc) + 2 欄 grid 會撞欄
     用 grid-template-areas 讓 num 跨兩 row、title/desc 各佔右側 */
  .process { grid-template-columns: 1fr; gap: var(--gap-xl); }
  .process::before { display: none; }
  .process__step {
    display: grid;
    grid-template-columns: 64px 1fr;
    grid-template-areas:
      "num title"
      "num desc";
    column-gap: var(--gap-md);
    row-gap: 4px;
    text-align: left;
    align-items: start;
  }
  .process__num   { grid-area: num; margin: 0; align-self: start; }
  .process__title { grid-area: title; margin-top: 0; }
  .process__desc  { grid-area: desc; }

  /* Cases featured 卡：橫排 → 直排 */
  .case-card--featured { flex-direction: column; grid-column: span 2; }
  .case-card--featured .case-card__photo {
    min-height: 240px;
    aspect-ratio: 16/10;
    flex: none;
  }
  .case-card--featured .case-card__body { padding: var(--gap-lg); }
  .cases-grid--single .case-card--featured { grid-column: auto; }

  /* Contact 兩欄 → 單欄 */
  .contact__grid { grid-template-columns: 1fr; min-height: auto; }
  .contact__map { min-height: 360px; }

  /* Footer 3 欄 → 2 欄 */
  .footer__inner { grid-template-columns: 1fr 1fr; }
}


/* ≤ 768 行動裝置 */
@media (max-width: 768px) {
  html { scroll-padding-top: 64px; }  /* 對齊 nav__inner 64px 高度 */

  .container { width: calc(100% - 32px); }
  .section { padding: var(--gap-xl) 0; }

  /* Nav 切換成漢堡 */
  .nav__menu, .nav__cta { display: none; }
  .nav__toggle { display: flex; }
  .nav__inner { height: 64px; }
  .nav.is-open .nav__mobile { display: flex; }

  /* Hero：用 svh 處理 LINE/IG/FB in-app browser 動態工具列
     min-height: auto 讓內容撐高度，避免 88vh 在 in-app browser 留空白 */
  .hero { min-height: auto; }
  .hero__content {
    padding-top: 64px;
    padding-bottom: 64px;
    min-height: calc(100vh - 64px);   /* 老瀏覽器 fallback */
    min-height: calc(100svh - 64px);  /* iOS 15.4+ / 現代瀏覽器，覆寫上一行 */
  }
  /* hero 背景焦點下移到 50%，避免下方暗區過大 */
  .hero__bg { background-position: center 50%; }
  .hero__title { font-size: clamp(36px, 8vw, 52px); }

  /* About values 維持 3 欄 → 切單欄 */
  .values { grid-template-columns: 1fr; }

  /* Services 2 欄 → 1 欄 */
  .services-grid { grid-template-columns: 1fr; }

  /* QC：保留 2×2（不切 1x4，避免手機要滑 4 屏） */
  .qc__grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .qc__title { font-size: clamp(28px, 5vw, 36px); }
  .qc__statement { margin-top: var(--gap-xl); padding-top: var(--gap-md); }

  /* Cases */
  .cases-grid { grid-template-columns: 1fr; }
  .case-card--featured { grid-column: span 1; }
  .case-card--featured .case-card__title { font-size: 22px; }

  /* Contact */
  .contact__line { padding: var(--gap-xl) var(--gap-lg); }
  .contact__line-id { font-size: 26px; }  /* 視覺重量讓給 CTA 按鈕 */
  .contact__map {
    aspect-ratio: 4/3;
    min-height: 280px;
  }

  /* Footer 2 欄 → 1 欄 */
  .footer__inner { grid-template-columns: 1fr; }
}


/* ≤ 480 小手機（iPhone SE 等） */
@media (max-width: 480px) {
  .section { padding: var(--gap-lg) 0; }
  .section__head { margin-bottom: var(--gap-lg); }
  .section__subtitle { font-size: 15px; }

  /* Hero 標題隱藏強制換行 */
  .hide-mobile { display: none; }
  .hero__title {
    font-size: clamp(30px, 8vw, 38px);
    letter-spacing: 0.01em;
  }
  .hero__subtitle { font-size: 15px; }
  .hero__ctas {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .hero__ctas .btn {
    flex: none;
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
  }

  /* Process 圓圈縮小 + 保持 grid-template-areas（從 1024 繼承） */
  .process__num {
    width: 48px;
    height: 48px;
    font-size: 20px;
  }
  .process__step {
    grid-template-columns: 48px 1fr;
    column-gap: var(--gap-sm);
  }
  .process__title { font-size: 16px; }
  .process__desc { font-size: 13px; }

  /* QC 標題 + 內文 收斂 */
  .qc__title {
    font-size: 24px;
    line-height: 1.4;
  }
  .qc__statement { font-size: 15px; line-height: 1.85; }

  /* Cases meta：dt/dd 改上下排 */
  .case-card__meta {
    grid-template-columns: 1fr;
    gap: 2px var(--gap-xs);
  }
  .case-card__meta dt {
    margin-top: 8px;
    font-size: 12px;
  }

  /* Contact LINE CTA */
  .contact__line { padding: var(--gap-lg) var(--gap-md); }
  .contact__line-icon { width: 48px; height: 48px; }
  .contact__line-id {
    font-size: 24px;
    letter-spacing: 0.02em;
  }
  .contact__line-desc { font-size: 14px; }

  /* Footer legal 改直排，避免 credit 跟 copyright 擠成一團 */
  .footer__legal {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
}


/* ≤ 360 極小手機（iPhone SE 1 代、折疊機外屏） */
@media (max-width: 360px) {
  /* nav 英文副標兩行擠壓 nav 高度，極窄手機隱藏 */
  .nav__brand-sub { display: none; }

  .hero__title {
    font-size: 26px;
    letter-spacing: 0;
  }
  .hero__subtitle { font-size: 14px; }
  .contact__line-id { font-size: 22px; }
  .qc__title { font-size: 22px; }
}


/* 橫向手機 / 矮 viewport（landscape）
   Hero min-height 在橫向手機下會擠壓 CTA */
@media (max-height: 500px) and (orientation: landscape) {
  .hero { min-height: 100vh; }
  .hero__content {
    padding-top: 56px;
    padding-bottom: 48px;
    max-width: none;
  }
  .hero__title { font-size: clamp(28px, 6vh, 40px); }
  .hero__subtitle { margin-top: var(--gap-md); font-size: 15px; }
  .hero__ctas { margin-top: var(--gap-md); }
}


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