/* ==========================================================================
   ONDAS 浪潮 · 傳統版公司網站樣式
   設計語彙：薄荷綠 #7dd3c0 ｜ 深藍 #16324a ｜ 珊瑚點綴 ｜ 大留白
   僅使用系統字型與本機資源，桌面到 320px 手機。
   ========================================================================== */

:root {
  --mint: #7dd3c0;
  --mint-soft: #e6f6f1;
  --mint-deep: #4db8a2;
  --navy: #16324a;
  --navy-deep: #0e2233;
  --navy-soft: #274b68;
  --coral: #f4795b;
  --coral-deep: #e05a3a;
  --ink: #22333f;
  --ink-soft: #52646f;
  --paper: #fbfdfc;
  --paper-2: #f2f8f5;
  --line: #dce9e3;
  --white: #ffffff;
  --shadow-sm: 0 2px 10px rgba(22, 50, 74, .07);
  --shadow-md: 0 10px 30px rgba(22, 50, 74, .12);
  --shadow-lg: 0 24px 60px rgba(14, 34, 51, .28);
  --radius: 14px;
  --radius-lg: 22px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC",
    "PingFang TC", "Microsoft JhengHei", "Helvetica Neue", Arial, sans-serif;
  --wrap: 1140px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-offset, 150px);
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
  background: var(--paper);
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--navy-soft); }
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: min(var(--wrap), 100% - 2.75rem);
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 200;
  padding: .7rem 1.2rem;
  background: var(--navy);
  color: var(--white);
  border-radius: 0 0 10px 10px;
  text-decoration: none;
  transition: top .2s ease;
}
.skip-link:focus { top: 0; color: var(--mint); }

/* ---------- 字型層級 ---------- */
.eyebrow {
  margin: 0 0 .9rem;
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--mint-deep);
}
.eyebrow.light { color: var(--mint); }

.section-title {
  margin: 0 0 .6rem;
  font-size: clamp(1.75rem, 1.2rem + 2.4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: .02em;
  color: var(--navy);
}

.lead {
  margin: 0 0 1rem;
  font-size: clamp(1.05rem, .98rem + .5vw, 1.3rem);
  font-weight: 500;
  color: var(--ink-soft);
}
.lead.light { color: rgba(255, 255, 255, .82); }

.display-line {
  margin: 0 0 1.1rem;
  font-size: clamp(1.15rem, 1rem + 1vw, 1.5rem);
  font-weight: 700;
  color: var(--navy-soft);
  position: relative;
  padding-left: 1.1rem;
}
.display-line::before {
  content: "";
  position: absolute;
  left: 0; top: .32em;
  width: 5px; height: 1.05em;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--mint-deep), var(--coral));
}

.sub-title {
  margin: 3.2rem 0 .4rem;
  font-size: clamp(1.2rem, 1.05rem + .8vw, 1.5rem);
  font-weight: 800;
  color: var(--navy);
}
.sub-note { margin: 0 0 1.4rem; font-size: .92rem; color: var(--ink-soft); }

/* ---------- 頁首 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251, 253, 252, .92);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  width: min(1280px, 100% - 2rem);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem 1.6rem;
  padding: .7rem 0;
}

.brand { display: inline-flex; align-items: center; }
.brand-logo {
  width: clamp(180px, 20vw, 240px);
  height: auto;
}

.site-nav { margin-left: auto; }
.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .15rem .95rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.site-nav a {
  display: inline-block;
  padding: .42rem .3rem;
  font-size: .92rem;
  font-weight: 600;
  color: var(--navy);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}
.site-nav a:hover { color: var(--coral-deep); border-color: var(--mint); }
.site-nav .nav-retour a {
  color: var(--coral-deep);
  white-space: nowrap;
}
.site-nav .nav-retour a:hover { border-color: var(--coral); }

@media (max-width: 900px) {
  .header-inner { justify-content: center; }
  .site-nav { margin-left: 0; }
  .site-nav ul { justify-content: center; }
}
@media (max-width: 560px) {
  .site-nav a { font-size: .86rem; padding: .35rem .28rem; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: min(92vh, 860px);
  display: grid;
  align-items: center;
  overflow: hidden;
  background: var(--navy-deep);
}
.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(160deg,
      rgba(14, 34, 51, .82) 0%,
      rgba(14, 34, 51, .55) 42%,
      rgba(14, 34, 51, .68) 100%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  width: min(1100px, 100% - 3rem);
  margin-inline: auto;
  padding: clamp(4.5rem, 10vh, 7rem) 0;
}
.hero-kicker {
  margin: 0 0 1.3rem;
  font-size: clamp(.8rem, .74rem + .4vw, .95rem);
  font-weight: 700;
  letter-spacing: .38em;
  color: var(--mint);
}
.hero-title {
  margin: 0 0 1.1rem;
  max-width: 21em;
  font-size: clamp(1.7rem, 1.1rem + 3.6vw, 3.3rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: .02em;
  color: var(--white);
  text-shadow: 0 2px 24px rgba(14, 34, 51, .45);
}
.hero-sub {
  margin: 0 0 2.2rem;
  font-size: clamp(.95rem, .9rem + .5vw, 1.12rem);
  color: rgba(230, 246, 241, .9);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
  margin-bottom: 2.4rem;
}

/* 按鈕 */
.btn {
  display: inline-block;
  padding: .78rem 1.7rem;
  font-size: .98rem;
  font-weight: 700;
  letter-spacing: .06em;
  border-radius: 999px;
  text-decoration: none;
  border: 2px solid transparent;
  transition: transform .16s ease, box-shadow .16s ease,
    background-color .16s ease, color .16s ease, border-color .16s ease;
}
.btn-solid {
  background: var(--mint);
  color: var(--navy-deep);
  box-shadow: 0 8px 22px rgba(125, 211, 192, .35);
}
.btn-solid:hover {
  background: var(--mint-deep);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(77, 184, 162, .4);
}
.btn-ghost {
  border-color: rgba(255, 255, 255, .75);
  color: var(--white);
}
.btn-ghost:hover {
  border-color: var(--coral);
  color: var(--coral);
  transform: translateY(-2px);
}
.footer-retour.btn-ghost {
  border-color: var(--navy-soft);
  color: var(--navy);
}
.footer-retour.btn-ghost:hover { border-color: var(--coral-deep); color: var(--coral-deep); }

.zoom-chip {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .45rem 1rem;
  font-size: .84rem;
  font-weight: 600;
  color: rgba(255, 255, 255, .92);
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, .4);
  border-radius: 999px;
  background: rgba(14, 34, 51, .35);
  transition: border-color .16s ease, background-color .16s ease;
}
.zoom-chip:hover { border-color: var(--mint); background: rgba(125, 211, 192, .18); }

/* ---------- 區塊骨架 ---------- */
.section { padding: clamp(4rem, 9vw, 6.8rem) 0; }
.about { background: var(--white); }
.services { background: var(--paper-2); }
.service { background: var(--white); }
.service.alt { background: var(--paper-2); }
.work { background: var(--white); }
.contact {
  background:
    radial-gradient(1100px 480px at 85% -10%, rgba(125, 211, 192, .16), transparent 60%),
    linear-gradient(180deg, var(--navy) 0%, var(--navy-deep) 100%);
  color: rgba(255, 255, 255, .88);
}
.contact .section-title { color: var(--white); }

.about-body { max-width: 46em; }
.about-body p { margin: 0 0 1.05rem; font-size: 1.06rem; }
.about-body p:last-child { margin-bottom: 0; }

/* ---------- 核心業務卡 ---------- */
.svc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.4rem;
  margin: 2.4rem 0 0;
  padding: 0;
  list-style: none;
}
.svc-card {
  position: relative;
  padding: 1.8rem 1.6rem 1.5rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
  overflow: hidden;
}
.svc-card::after {
  content: "";
  position: absolute;
  left: 1.6rem; right: 1.6rem; top: 0;
  height: 4px;
  border-radius: 0 0 4px 4px;
  background: linear-gradient(90deg, var(--mint-deep), var(--mint));
  opacity: 0;
  transition: opacity .18s ease;
}
.svc-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--mint);
}
.svc-card:hover::after { opacity: 1; }
.svc-card h3 {
  margin: .2rem 0 .55rem;
  font-size: 1.18rem;
  font-weight: 800;
  color: var(--navy);
}
.svc-card p { margin: 0 0 1rem; font-size: .95rem; color: var(--ink-soft); }
.svc-num {
  font-size: .8rem;
  font-weight: 800;
  letter-spacing: .22em;
  color: var(--coral);
}
.svc-more {
  display: inline-block;
  margin-right: 1rem;
  font-size: .88rem;
  font-weight: 700;
  color: var(--mint-deep);
  text-decoration: none;
}
.svc-more:hover { color: var(--coral-deep); }

/* ---------- 服務章節 ---------- */
.service-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  gap: clamp(2rem, 5vw, 4.2rem);
  align-items: center;
}
.service-grid.rev { grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); }
.service-text { max-width: 40em; }
.service-text.center { margin-inline: auto; text-align: center; }
.service-text.center .display-line { display: inline-block; text-align: left; }
.service-text > p { margin: 0 0 1.05rem; }
.service-text > p:last-of-type { margin-bottom: 0; }

.svc-list {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: .55rem;
}
.svc-list li {
  position: relative;
  padding-left: 1.65rem;
  font-weight: 500;
  color: var(--ink);
}
.svc-list li::before {
  content: "";
  position: absolute;
  left: .2rem; top: .58em;
  width: .52rem; height: .52rem;
  border-radius: 50%;
  background: var(--mint-deep);
  box-shadow: 0 0 0 4px var(--mint-soft);
}
.svc-list.inline-wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .6rem 1.1rem;
}
.svc-list.inline-wrap li { padding-left: 1.5rem; }
.service-text.center .svc-list li { text-align: left; }

@media (max-width: 860px) {
  .service-grid,
  .service-grid.rev { grid-template-columns: 1fr; }
  .service-text.center { text-align: left; }
  .svc-list.inline-wrap { justify-content: flex-start; }
}

/* ---------- 圖片卡（可放大） ---------- */
.photo-card { margin: 0; }
.photo-card .zoom-link { display: block; }
.photo-card img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  transition: transform .2s ease;
}
.photo-card figcaption {
  margin-top: .7rem;
  font-size: .85rem;
  color: var(--ink-soft);
  letter-spacing: .04em;
}
.src {
  display: inline-block;
  margin-left: .5rem;
  padding: .05rem .6rem;
  font-size: .74rem;
  font-weight: 600;
  color: var(--navy-soft);
  background: var(--mint-soft);
  border-radius: 999px;
  white-space: nowrap;
}

figure.pair-col { align-self: start; }
.pair-stack {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .9rem;
}
.pair-stack .zoom-link { display: block; }
.pair-stack img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
@media (max-width: 480px) {
  .pair-stack { grid-template-columns: 1fr 1fr; gap: .55rem; }
}

.figure-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin-top: 2.6rem;
}
@media (max-width: 720px) {
  .figure-pair { grid-template-columns: 1fr; gap: 1.6rem; }
}

/* 放大提示角標 */
.zoom-link { position: relative; }
.zoom-hint {
  position: absolute;
  right: .7rem; bottom: .7rem;
  padding: .28rem .75rem;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--navy-deep);
  background: rgba(125, 211, 192, .92);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity .18s ease, transform .18s ease;
  pointer-events: none;
}
.zoom-link:hover .zoom-hint,
.zoom-link:focus-visible .zoom-hint { opacity: 1; transform: translateY(0); }

/* ---------- 互動案例 ---------- */
.demo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.3rem;
}
@media (max-width: 720px) { .demo-grid { grid-template-columns: 1fr; } }

.demo-card {
  margin: 0;
  padding: 1rem;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
}
.demo-card .zoom-link {
  flex: 1;
  display: grid;
  align-items: center;
  background: var(--white);
  border-radius: calc(var(--radius) - 4px);
  overflow: hidden;
  min-height: 180px;
}
.demo-card img {
  width: 100%;
  height: 100%;
  max-height: 330px;
  object-fit: contain;
  transition: transform .2s ease;
}
.demo-card figcaption {
  margin-top: .8rem;
  font-size: .9rem;
  font-weight: 700;
  color: var(--navy);
}
.demo-card .src { margin-left: .45rem; }
.zoom-link:hover img { transform: scale(1.025); }

/* ---------- 作品組圖（不可裁切） ---------- */
.collage {
  margin: 2.8rem 0 0;
  padding: 0;
}
.collage .zoom-link {
  display: block;
  background: var(--navy-deep);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.collage img {
  width: 100%;
  aspect-ratio: 2200 / 1238;
  object-fit: contain;
  background: var(--navy-deep);
}
.collage figcaption {
  margin-top: .7rem;
  font-size: .88rem;
  color: var(--ink-soft);
}

/* ---------- 聯絡 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.4rem;
  margin: 2.6rem 0 0;
}
.contact-card {
  padding: 1.9rem 1.8rem;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(125, 211, 192, .35);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(4px);
}
.contact-tag {
  display: inline-block;
  margin: 0 0 .6rem;
  padding: .18rem .85rem;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--navy-deep);
  background: var(--mint);
  border-radius: 999px;
}
.contact-card h3 {
  margin: 0 0 .7rem;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--white);
}
.addr { margin: 0; font-size: .98rem; color: rgba(255, 255, 255, .85); }

.contact-mail {
  margin: 2.4rem 0 0;
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--mint);
}
.contact-mail a {
  color: var(--mint);
  text-decoration: underline;
  text-decoration-color: rgba(125, 211, 192, .5);
  text-underline-offset: .3em;
  word-break: break-all;
}
.contact-mail a:hover { color: var(--coral); text-decoration-color: var(--coral); }

/* ---------- 頁尾 ---------- */
.site-footer {
  padding: 2.8rem 0;
  background: var(--navy-deep);
  color: rgba(255, 255, 255, .72);
  border-top: 1px solid rgba(125, 211, 192, .25);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.6rem 2.6rem;
}
.footer-brand { min-width: 220px; }
.footer-logo { width: 132px; height: auto; margin-bottom: .5rem; }
.footer-brand p { margin: 0; font-size: .88rem; }
.footer-meta { margin-left: auto; max-width: 34em; }
.footer-meta p { margin: 0 0 .3rem; font-size: .8rem; line-height: 1.7; }
.footer-meta code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .76rem;
  color: var(--mint);
}
@media (max-width: 760px) {
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 1.4rem; }
  .footer-meta { margin-left: 0; }
}

/* ---------- Lightbox 對話框 ---------- */
.lightbox {
  padding: 0;
  border: none;
  background: transparent;
  max-width: min(94vw, 1320px);
  max-height: 94dvh;
  overflow: auto;
}
.lightbox::backdrop {
  background: rgba(14, 34, 51, .82);
  backdrop-filter: blur(3px);
}
.lightbox[open] { display: grid; }
.lightbox-frame {
  position: relative;
  display: grid;
  gap: .8rem;
  padding: clamp(.8rem, 2vw, 1.4rem);
  background: rgba(14, 34, 51, .55);
  border: 1px solid rgba(125, 211, 192, .3);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.lightbox-img {
  max-width: min(88vw, 1240px);
  max-height: min(65dvh, calc(94dvh - 180px));
  width: auto;
  height: auto;
  margin-inline: auto;
  object-fit: contain;
  border-radius: calc(var(--radius) - 4px);
}
.lightbox-caption { text-align: center; }
.lightbox-title {
  margin: 0 0 .15rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--white);
}
.lightbox-src {
  margin: 0;
  font-size: .82rem;
  letter-spacing: .05em;
  color: rgba(230, 246, 241, .8);
}
.lightbox-close {
  position: static;
  justify-self: end;
  min-height: 44px;
  padding: .5rem 1.05rem;
  font-family: inherit;
  font-size: .88rem;
  font-weight: 700;
  color: var(--navy-deep);
  background: var(--mint);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: background-color .16s ease, transform .16s ease;
}
.lightbox-close:hover { background: var(--coral); color: var(--white); transform: translateY(-1px); }

/* ---------- 回頂按鈕（site.js 產生） ---------- */
.to-top {
  position: fixed;
  right: clamp(.9rem, 3vw, 1.6rem);
  bottom: clamp(.9rem, 3vw, 1.6rem);
  z-index: 150;
  width: 46px;
  height: 46px;
  font-family: inherit;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--navy-deep);
  background: var(--mint);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: background-color .16s ease, transform .16s ease;
}
.to-top:hover { background: var(--coral); color: var(--white); transform: translateY(-2px); }
.to-top[hidden] { display: none; }

/* 舊瀏覽器 fallback：dialog polyfill 情境下居中 */
body.lb-open { overflow: hidden; }
body.lb-open .lightbox {
  position: fixed;
  inset: 0;
  margin: auto;
  display: grid;
  place-items: center;
}

/* ---------- 320px 極窄調整 ---------- */
@media (max-width: 380px) {
  body { font-size: 16px; }
  .hero-actions .btn { width: 100%; text-align: center; }
  .contact-card { padding: 1.5rem 1.2rem; }
  .demo-card { padding: .8rem; }
  .src { margin-left: .3rem; }
}