/* =========================================================
   北平烤鴨 官方網站樣式
   ========================================================= */

:root {
  --red: #8e1b14;          /* 宮廷紅 */
  --red-dark: #5e0f0a;
  --amber: #c8621f;        /* 烤鴨皮色 */
  --gold: #d9a441;
  --gold-light: #f5d48a;
  --cream: #fbf5ea;
  --paper: #fffdf8;
  --ink: #2b1a14;
  --muted: #7a6458;
  --line: #ead9c2;
  --line-green: #06c755;

  --font-serif: "Noto Serif TC", "Songti TC", serif;
  --font-sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;

  --radius: 14px;
  --shadow: 0 10px 30px rgba(94, 15, 10, .12);
  --header-h: 72px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

.container { width: min(1160px, 100% - 32px); margin-inline: auto; }
.container.narrow { width: min(780px, 100% - 32px); }

h1, h2, h3 { font-family: var(--font-serif); line-height: 1.3; margin: 0 0 .5em; }

.eyebrow {
  margin: 0 0 .5rem;
  font-size: .85rem;
  letter-spacing: .25em;
  color: var(--amber);
  font-weight: 700;
}

/* ---------- 按鈕 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4em;
  padding: .8em 1.6em;
  border-radius: 999px;
  border: 2px solid transparent;
  font: 700 1rem var(--font-sans);
  text-decoration: none;
  cursor: pointer;
  transition: transform .2s, background .2s, color .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--red); color: #fff; box-shadow: 0 6px 18px rgba(142, 27, 20, .3); }
.btn-primary:hover { background: var(--red-dark); }
.btn-ghost { border-color: var(--gold-light); color: var(--gold-light); }
.btn-ghost:hover { background: var(--gold-light); color: var(--red-dark); }
.btn-outline { border-color: var(--red); color: var(--red); background: transparent; }
.btn-outline:hover { background: var(--red); color: #fff; }
.btn-line { background: var(--line-green); color: #fff; }
.btn-block { width: 100%; }

/* ---------- 頁首 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 253, 248, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, box-shadow .3s;
}
.site-header.is-scrolled { border-color: var(--line); box-shadow: 0 4px 20px rgba(0,0,0,.05); }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }

.logo { display: flex; align-items: center; gap: .6rem; text-decoration: none; }
.logo-mark { width: 48px; height: 48px; flex: none; }
.logo-text { font: 900 1.3rem var(--font-serif); color: var(--red); line-height: 1.1; }
.logo-text small { display: block; font: 500 .62rem var(--font-sans); letter-spacing: .18em; color: var(--muted); }

.site-nav { display: flex; align-items: center; gap: 1.8rem; }
.site-nav a { text-decoration: none; font-weight: 500; position: relative; padding: .3em 0; }
.site-nav a:not(.nav-cta)::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 2px; background: var(--amber);
  transition: width .25s;
}
.site-nav a:not(.nav-cta):hover::after,
.site-nav a.is-active::after { width: 100%; }
.nav-cta { background: var(--red); color: #fff; padding: .45em 1.2em !important; border-radius: 999px; }
.nav-cta:hover { background: var(--red-dark); }

.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; margin: 5px 0; background: var(--red); transition: transform .3s, opacity .3s; }
.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); }

/* ---------- 主視覺 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 75% 40%, rgba(217, 164, 65, .35), transparent 45%),
    linear-gradient(135deg, var(--red-dark), var(--red) 60%, #a83a1a);
}
.hero::after {
  /* 傳統回紋 */
  content: ""; position: absolute; inset: 0; opacity: .07; pointer-events: none;
  background-image: repeating-linear-gradient(45deg, #fff 0 2px, transparent 2px 22px);
}
.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 2rem;
  min-height: min(calc(100svh - var(--header-h)), 760px);
  padding-block: 4rem;
}
.hero .eyebrow { color: var(--gold-light); }
.hero h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 900; }
.hero h1 span { color: var(--gold-light); }
.hero-lead { font-size: 1.08rem; max-width: 34em; opacity: .92; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin: 2rem 0; }
.hero-badges { list-style: none; padding: 0; margin: 0; display: flex; gap: 2.2rem; flex-wrap: wrap; }
.hero-badges li { font-size: .9rem; opacity: .9; }
.hero-badges strong { display: block; font: 900 2rem var(--font-serif); color: var(--gold-light); line-height: 1.1; }
.hero-visual img { width: 100%; max-width: 460px; margin-inline: auto; filter: drop-shadow(0 25px 40px rgba(0,0,0,.35)); animation: float 5s ease-in-out infinite; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* ---------- 區塊通用 ---------- */
.section { padding-block: clamp(4rem, 9vw, 7rem); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 3rem; }
.section-head h2 { font-size: clamp(1.8rem, 4vw, 2.6rem); color: var(--red); }
.section-head h2::after {
  content: ""; display: block; width: 56px; height: 3px; margin: .6em auto 0;
  background: linear-gradient(90deg, var(--gold), var(--amber));
}
.section-head p:not(.eyebrow) { color: var(--muted); margin: 0; }
.section-head.light h2 { color: var(--gold-light); }

/* ---------- 品牌故事 ---------- */
.about { background: var(--cream); }
.about-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.feature {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 2rem; text-align: center; transition: transform .3s, box-shadow .3s;
}
.feature:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.feature-icon {
  width: 64px; height: 64px; margin: 0 auto 1rem; border-radius: 50%;
  display: grid; place-items: center; background: #fbe9d6;
}
.feature-icon svg { width: 30px; height: 30px; fill: none; stroke: var(--amber); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.feature h3 { color: var(--red); font-size: 1.3rem; }
.feature p { color: var(--muted); margin: 0; }

/* ---------- 菜單 ---------- */
.menu-tabs { display: flex; justify-content: center; flex-wrap: wrap; gap: .6rem; margin-bottom: 2.5rem; }
.menu-tab {
  font: 500 .95rem var(--font-sans); padding: .5em 1.3em; border-radius: 999px;
  border: 1px solid var(--line); background: var(--paper); color: var(--ink); cursor: pointer;
  transition: background .2s, color .2s, border-color .2s;
}
.menu-tab:hover { border-color: var(--amber); }
.menu-tab.is-active { background: var(--red); border-color: var(--red); color: #fff; }

.menu-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.menu-card {
  background: var(--paper); border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); transition: transform .3s, box-shadow .3s;
}
.menu-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.menu-card.is-hidden { display: none; }

/* 菜色圖片：有實拍照片時，在 .menu-photo 加上 style="background-image:url(img/xxx.jpg)" 即可替換 */
.menu-photo {
  position: relative; aspect-ratio: 4 / 3;
  background-size: cover; background-position: center;
  background-color: var(--amber);
}
.menu-photo:not([style])::before {
  content: ""; position: absolute; inset: 15%;
  background: url(../img/duck.svg) center / contain no-repeat;
  opacity: .9;
}
.tone-1 { background-image: linear-gradient(135deg, #c8621f, #8e1b14); }
.tone-2 { background-image: linear-gradient(135deg, #d9893a, #a8471a); }
.tone-3 { background-image: linear-gradient(135deg, #8e1b14, #5e0f0a); }
.tone-4 { background-image: linear-gradient(135deg, #e0a85a, #b36a2a); }
.tone-5 { background-image: linear-gradient(135deg, #6e8b3d, #3f5a1f); }
.tone-6 { background-image: linear-gradient(135deg, #e6cfa3, #b89564); }
.tone-7 { background-image: linear-gradient(135deg, #f1e3c6, #d4b98a); }
.tone-8 { background-image: linear-gradient(135deg, #a7563a, #6b2d1d); }
.tone-9 { background-image: linear-gradient(135deg, #7a2335, #4a1020); }

.tag {
  position: absolute; top: 12px; left: 12px; z-index: 1;
  background: var(--gold); color: var(--red-dark);
  font-size: .8rem; font-weight: 700; padding: .2em .8em; border-radius: 999px;
}
.menu-body { padding: 1.3rem 1.4rem 1.5rem; }
.menu-body h3 { font-size: 1.2rem; margin-bottom: .3em; }
.menu-body p { margin: 0; color: var(--muted); font-size: .95rem; }
.menu-body .price { margin-top: .8rem; color: var(--red); font: 900 1.25rem var(--font-serif); }

/* ---------- 一鴨三吃 ---------- */
.three-ways { background: linear-gradient(160deg, var(--red-dark), var(--red)); color: #fff; }
.ways { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.ways li {
  position: relative; padding: 2.2rem 1.8rem;
  border: 1px solid rgba(245, 212, 138, .35); border-radius: var(--radius);
  background: rgba(255, 255, 255, .05);
}
.way-no {
  display: inline-block; margin-bottom: .8rem; padding: .15em .9em;
  background: var(--gold-light); color: var(--red-dark);
  font: 900 1rem var(--font-serif); border-radius: 6px;
}
.ways h3 { font-size: 1.4rem; color: var(--gold-light); }
.ways p { margin: 0; opacity: .9; }

/* ---------- 門市 ---------- */
.stores { background: var(--cream); }
.store-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.store-card {
  background: var(--paper); border-radius: var(--radius); padding: 1.8rem;
  border-top: 4px solid var(--red); box-shadow: 0 4px 16px rgba(0,0,0,.04);
}
.store-card h3 { color: var(--red); font-size: 1.35rem; }
.store-card dl { display: grid; grid-template-columns: auto 1fr; gap: .4rem 1rem; margin: 0 0 1.4rem; }
.store-card dt { color: var(--amber); font-weight: 700; }
.store-card dd { margin: 0; }
.store-card dd a { text-decoration: none; }
.store-card dd small { color: var(--muted); }
.store-single { display: grid; grid-template-columns: 1fr 1.3fr; gap: 1.5rem; align-items: stretch; }
.store-single .store-card { display: flex; flex-direction: column; justify-content: center; padding: 2.2rem; }
.store-actions { display: flex; flex-wrap: wrap; gap: .8rem; }
.store-map { border-radius: var(--radius); overflow: hidden; min-height: 340px; box-shadow: 0 4px 16px rgba(0,0,0,.06); }
.store-map iframe { display: block; width: 100%; height: 100%; min-height: 340px; border: 0; }

/* ---------- 預訂 ---------- */
.order-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.order-info h2 { font-size: clamp(1.8rem, 4vw, 2.4rem); color: var(--red); }
.order-steps { counter-reset: step; list-style: none; padding: 0; margin: 1.5rem 0; }
.order-steps li { counter-increment: step; position: relative; padding: 0 0 1.2rem 3.2rem; color: var(--muted); }
.order-steps li::before {
  content: counter(step); position: absolute; left: 0; top: 0;
  width: 2.2rem; height: 2.2rem; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--red); color: #fff; font-weight: 700;
}
.order-steps strong { display: block; color: var(--ink); }
.note { font-size: .9rem; color: var(--muted); background: var(--cream); padding: .8rem 1rem; border-radius: 8px; }
.contact-quick { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 1.5rem; }

.order-call {
  background: var(--paper); border: 1px solid var(--line); border-top: 4px solid var(--red);
  border-radius: var(--radius); padding: 2.5rem 2rem; text-align: center; box-shadow: var(--shadow);
}
.order-call-label { margin: 0; color: var(--amber); font-weight: 700; letter-spacing: .2em; }
.order-call-number {
  display: block; margin: .3rem 0; text-decoration: none;
  font: 900 clamp(2.2rem, 6vw, 3rem) var(--font-serif); color: var(--red); letter-spacing: .03em;
}
.order-call-hint { margin: 0 0 1.5rem; color: var(--muted); font-size: .92rem; }

/* ---------- FAQ ---------- */
.faq details { border-bottom: 1px solid var(--line); padding: 1.1rem 0; }
.faq summary {
  cursor: pointer; list-style: none; font-weight: 700; font-size: 1.05rem;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--red); font-size: 1.5rem; transition: transform .3s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { color: var(--muted); margin: .8rem 0 0; }

/* ---------- 頁尾 ---------- */
.site-footer { background: #24120d; color: #d8c6b5; padding-top: 4rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 2rem; padding-bottom: 2.5rem; }
.site-footer h4 { color: var(--gold-light); margin: 0 0 1rem; font-family: var(--font-serif); }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: .5rem; }
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--gold-light); }
.logo-footer .logo-text { color: var(--gold-light); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding-block: 1.2rem; font-size: .85rem; text-align: center; }
.footer-bottom p { margin: 0; }

/* ---------- 回到頂端 ---------- */
.back-to-top {
  position: fixed; right: 20px; bottom: 20px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--red); color: #fff; text-decoration: none; font-size: 1.2rem;
  box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transform: translateY(10px);
  transition: opacity .3s, transform .3s;
}
.back-to-top.is-visible { opacity: 1; pointer-events: auto; transform: none; }

/* ---------- 捲動淡入 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

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

/* ---------- 響應式 ---------- */
@media (max-width: 960px) {
  .about-grid, .menu-grid, .ways, .store-grid { grid-template-columns: repeat(2, 1fr); }
  .order-inner, .store-single { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .site-nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    padding: .5rem 16px 1.2rem;
    transform: translateY(-120%); transition: transform .3s;
    z-index: -1;
  }
  .site-nav.is-open { transform: none; }
  .site-nav a { padding: .9em 0; border-bottom: 1px solid var(--line); }
  .site-nav a::after { display: none; }
  .nav-cta { margin-top: 1rem; text-align: center; border-bottom: 0 !important; }

  .hero-inner { grid-template-columns: 1fr; text-align: center; padding-block: 3rem; min-height: auto; }
  .hero-visual { order: -1; }
  .hero-visual img { max-width: 260px; }
  .hero-lead { margin-inline: auto; }
  .hero-actions, .hero-badges { justify-content: center; }

  .about-grid, .menu-grid, .ways, .store-grid, .footer-grid { grid-template-columns: 1fr; }
  .field-row { flex-direction: column; gap: 0; }
}