/* =========================================================
   CHENYIN INCENSE 沉隱香道 — 全站共用樣式
   設計系統：沉香木褐 + 暖奶油底 + 餘燼金點綴
   版面：max-width 容器 + clamp() 留白 + flex/grid + RWD
   ========================================================= */

:root {
  /* 配色 */
  --color-primary: #4b3b30;        /* 沉香木褐（主色） */
  --color-primary-dark: #382b22;
  --color-primary-soft: #7a6757;
  --color-accent: #c08a3e;         /* 餘燼金（爐火餘溫） */
  --color-accent-dark: #a06f2a;
  --color-ink: #2c2722;            /* 主要文字 */
  --color-ink-soft: #685f55;       /* 次要文字 */
  --color-cream: #f6f1e7;          /* 暖奶油底 */
  --color-cream-deep: #ece3d3;
  --color-surface: #ffffff;
  --color-line: #e3dccd;
  --color-line-dark: rgba(255,255,255,.18);

  /* 字級階層 (clamp 流體) */
  --fs-display: clamp(2.3rem, 5.2vw, 4.2rem);
  --fs-h1: clamp(1.9rem, 4vw, 3rem);
  --fs-h2: clamp(1.5rem, 3vw, 2.2rem);
  --fs-h3: clamp(1.2rem, 2vw, 1.5rem);
  --fs-lead: clamp(1.05rem, 1.6vw, 1.3rem);
  --fs-body: 1rem;
  --fs-sm: .9rem;

  /* 版面 */
  --container: 1180px;
  --container-narrow: 820px;
  --pad-x: clamp(1.1rem, 4vw, 2.5rem);
  --section-y: clamp(3.5rem, 8vw, 6.5rem);
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 4px 14px rgba(40,48,44,.08);
  --shadow-md: 0 14px 40px rgba(40,48,44,.14);
  --ease: cubic-bezier(.4,.0,.2,1);

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

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--color-ink);
  background: var(--color-cream);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; }
:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 3px; }

/* ---------- 共用容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}
.container--narrow { max-width: var(--container-narrow); }
.section { padding-block: var(--section-y); }
.section--cream { background: var(--color-cream); }
.section--deep { background: var(--color-primary); color: #fff; }
.section--surface { background: var(--color-surface); }

/* ---------- 字體輔助 ---------- */
.eyebrow {
  display: inline-block;
  font-size: var(--fs-sm);
  letter-spacing: .22em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-accent-dark);
  margin-bottom: .9rem;
}
.section--deep .eyebrow { color: var(--color-accent); }
.display { font-family: var(--font-serif); font-size: var(--fs-display); letter-spacing: .01em; }
.display em { font-style: normal; color: var(--color-accent); }
.h1 { font-size: var(--fs-h1); font-family: var(--font-serif); }
.h2 { font-size: var(--fs-h2); font-family: var(--font-serif); }
.h3 { font-size: var(--fs-h3); }
.lead { font-size: var(--fs-lead); color: var(--color-ink-soft); max-width: 52ch; }
.section--deep .lead { color: rgba(255,255,255,.85); }
.muted { color: var(--color-ink-soft); }
.text-center { text-align: center; }
.mx-auto { margin-inline: auto; }

.section-head { max-width: 60ch; margin-bottom: clamp(2rem, 4vw, 3rem); }
.section-head.text-center { margin-inline: auto; }

/* ---------- 按鈕（相對內距，CTA 同尺寸） ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5em;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1;
  padding: .85em 1.7em;
  border-radius: 999px;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease), color .2s var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-dark); box-shadow: var(--shadow-md); }
.btn--accent { background: var(--color-accent); color: #2a2410; }
.btn--accent:hover { background: var(--color-accent-dark); color: #fff; box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn--ghost:hover { background: var(--color-primary); color: #fff; }
.section--deep .btn--ghost { color: #fff; border-color: rgba(255,255,255,.6); }
.section--deep .btn--ghost:hover { background: #fff; color: var(--color-primary); }
.btn--sm { padding: .6em 1.25em; font-size: .9rem; }
.btn--lg { padding: 1em 2.1em; font-size: 1.08rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: .9rem; }
.btn-row.text-center { justify-content: center; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(246,241,231,.85);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--color-line);
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; min-height: 72px;
}
.brand { display: flex; flex-direction: column; line-height: 1.1; }
.brand__name { font-family: var(--font-serif); font-size: 1.35rem; font-weight: 700; color: var(--color-primary); letter-spacing: .04em; }
.brand__tag { font-size: .7rem; letter-spacing: .28em; color: var(--color-ink-soft); text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: clamp(.6rem, 1.5vw, 1.4rem); }
.nav__link {
  font-size: .96rem; font-weight: 500; color: var(--color-ink-soft);
  padding: .4em 0; position: relative; transition: color .2s var(--ease);
}
.nav__link::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px;
  background: var(--color-accent); transition: width .25s var(--ease);
}
.nav__link:hover, .nav__link.is-active { color: var(--color-primary); }
.nav__link.is-active::after, .nav__link:hover::after { width: 100%; }
.nav__cta { margin-left: .4rem; }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  width: 44px; height: 44px; align-items: center; justify-content: center;
  background: none; border: none; cursor: pointer;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--color-primary); border-radius: 2px; transition: transform .3s var(--ease), opacity .3s var(--ease); }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 900px) {
  .nav-toggle { display: flex; }
  .nav {
    position: fixed; inset: 72px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--color-cream);
    border-bottom: 1px solid var(--color-line);
    padding: .5rem var(--pad-x) 1.5rem;
    transform: translateY(-120%);
    transition: transform .35s var(--ease);
    box-shadow: var(--shadow-md);
  }
  .nav.is-open { transform: translateY(0); }
  .nav__link { padding: .85em 0; border-bottom: 1px solid var(--color-line); }
  .nav__link::after { display: none; }
  .nav__cta { margin: 1rem 0 0; }
  .nav__cta .btn { width: 100%; }
}

/* ---------- Hero ---------- */
.hero { position: relative; color: #fff; isolation: isolate; }
.hero__bg {
  position: absolute; inset: 0; z-index: -2;
  background-size: cover; background-position: center;
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(35,69,57,.55) 0%, rgba(35,69,57,.7) 100%);
}
.hero__inner {
  min-height: min(82vh, 720px);
  display: flex; flex-direction: column; justify-content: center;
  padding-block: clamp(4rem, 12vh, 8rem);
  max-width: 44rem;
}
.hero .lead { color: rgba(255,255,255,.9); }
.hero__stats { display: flex; flex-wrap: wrap; gap: clamp(1.5rem, 5vw, 3rem); margin-top: 2.5rem; }
.hero__stat strong { display: block; font-family: var(--font-serif); font-size: clamp(1.6rem,3vw,2.2rem); color: var(--color-accent); }
.hero__stat span { font-size: .9rem; color: rgba(255,255,255,.8); }

/* ---------- Grid 工具 ---------- */
.grid { display: grid; gap: clamp(1.2rem, 2.5vw, 2rem); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

/* ---------- 卡片 ---------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.card__media { aspect-ratio: 4/3; overflow: hidden; background: var(--color-cream-deep); }
.card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.card:hover .card__media img { transform: scale(1.05); }
.card__body { padding: 1.4rem 1.5rem 1.6rem; display: flex; flex-direction: column; gap: .6rem; flex: 1; }
.card__title { font-size: 1.2rem; font-family: var(--font-serif); }
.card__price { font-weight: 700; color: var(--color-primary); }
.card__price .strike { color: var(--color-ink-soft); font-weight: 400; text-decoration: line-through; margin-right: .4em; font-size: .9em; }
.card__foot { margin-top: auto; padding-top: .4rem; }
.tag { display: inline-block; align-self: flex-start; font-size: .72rem; letter-spacing: .1em; font-weight: 600; padding: .25em .7em; border-radius: 999px; background: var(--color-cream-deep); color: var(--color-primary-dark); }
.tag--hot { background: var(--color-accent); color: #2a2410; }

/* ---------- Feature / 特點 ---------- */
.feature { text-align: center; padding: 1rem; }
.feature__icon {
  width: 60px; height: 60px; margin: 0 auto 1rem; border-radius: 50%;
  display: grid; place-items: center; font-size: 1.6rem;
  background: var(--color-cream-deep); color: var(--color-primary);
}
.section--deep .feature__icon { background: rgba(255,255,255,.12); color: var(--color-accent); }
.feature h3 { margin-bottom: .4rem; }
.feature p { color: var(--color-ink-soft); font-size: .96rem; }
.section--deep .feature p { color: rgba(255,255,255,.8); }

/* ---------- 圖文並排 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
.split--reverse .split__media { order: 2; }
.split__media img { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); width: 100%; }
.split__body h2 { margin-bottom: 1rem; }
.split__body p + p { margin-top: 1rem; }
@media (max-width: 760px) {
  .split { grid-template-columns: 1fr; }
  .split--reverse .split__media { order: 0; }
}

/* ---------- 步驟 / 清單 ---------- */
.steps { display: grid; gap: 1.5rem; counter-reset: step; }
.step { display: flex; gap: 1.2rem; align-items: flex-start; }
.step__num {
  flex: none; width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center; font-family: var(--font-serif); font-weight: 700;
  background: var(--color-primary); color: #fff;
}
.step__body h3 { margin-bottom: .3rem; }
.step__body p { color: var(--color-ink-soft); }

.checklist { list-style: none; padding: 0; display: grid; gap: .8rem; }
.checklist li { display: flex; gap: .7rem; align-items: flex-start; }
.checklist li::before { content: "✦"; color: var(--color-accent-dark); font-size: 1rem; line-height: 1.6; }

/* ---------- CTA Band ---------- */
.cta-band { text-align: center; }
.cta-band .h2 { margin-bottom: 1rem; }
.cta-band .lead { margin: 0 auto 1.8rem; }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 1rem; max-width: 760px; margin-inline: auto; }
.faq details {
  background: var(--color-surface); border: 1px solid var(--color-line);
  border-radius: var(--radius); padding: 1.1rem 1.4rem;
}
.faq summary { font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--color-accent-dark); font-size: 1.3rem; transition: transform .2s var(--ease); }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin-top: .8rem; color: var(--color-ink-soft); }

/* ---------- 表單 ---------- */
.form { display: grid; gap: 1.1rem; }
.form__row { display: grid; gap: 1.1rem; grid-template-columns: 1fr 1fr; }
@media (max-width: 560px){ .form__row { grid-template-columns: 1fr; } }
.field { display: grid; gap: .4rem; }
.field label { font-size: .9rem; font-weight: 600; }
.field input, .field textarea, .field select {
  font: inherit; padding: .8em 1em; border: 1.5px solid var(--color-line);
  border-radius: 10px; background: #fff; color: var(--color-ink); width: 100%;
}
.field textarea { min-height: 130px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--color-primary-soft); box-shadow: 0 0 0 3px rgba(90,133,118,.18); }

/* ---------- 資訊卡 / 聯絡 ---------- */
.info-grid { display: grid; gap: 1.2rem; }
.info-card { background: var(--color-surface); border: 1px solid var(--color-line); border-radius: var(--radius); padding: 1.4rem 1.5rem; }
.info-card h3 { font-size: 1.05rem; margin-bottom: .3rem; }
.info-card p, .info-card a { color: var(--color-ink-soft); font-size: .96rem; }
.info-card a:hover { color: var(--color-primary); }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-primary-dark); color: rgba(255,255,255,.8); padding-block: clamp(3rem, 6vw, 4.5rem) 2rem; }
.site-footer a { color: rgba(255,255,255,.8); }
.site-footer a:hover { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: clamp(1.5rem, 4vw, 3rem); }
@media (max-width: 760px){ .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 460px){ .footer-grid { grid-template-columns: 1fr; } }
.footer-brand .brand__name { color: #fff; }
.footer-brand p { margin-top: .8rem; font-size: .92rem; max-width: 32ch; }
.footer-col h4 { color: #fff; font-size: .95rem; margin-bottom: 1rem; letter-spacing: .04em; }
.footer-col ul { list-style: none; padding: 0; display: grid; gap: .6rem; font-size: .92rem; }
.footer-social { display: flex; gap: .8rem; margin-top: 1rem; }
.footer-social a { width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--color-line-dark); display: grid; place-items: center; transition: background .2s var(--ease), color .2s var(--ease); }
.footer-social a:hover { background: var(--color-accent); color: #2a2410; border-color: var(--color-accent); }
.footer-bottom { border-top: 1px solid var(--color-line-dark); margin-top: 2.5rem; padding-top: 1.5rem; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; font-size: .85rem; }

/* ---------- 動效 ---------- */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
  .reveal.is-visible { opacity: 1; transform: none; }
}

/* ---------- 頁面小標題 banner ---------- */
.page-hero { background: var(--color-primary); color: #fff; padding-block: clamp(3rem, 7vw, 5rem); }
.page-hero .eyebrow { color: var(--color-accent); }
.page-hero h1 { font-family: var(--font-serif); font-size: var(--fs-h1); margin-bottom: .8rem; }
.page-hero p { color: rgba(255,255,255,.85); max-width: 56ch; }