/* 虹曙英文站：配色、字型照虹曙 Shopify 站（黑白、Inter、按鈕圓角 14px、細灰框線 #DFDFDF）。
   字型不另外載入：有裝 Inter 就用 Inter，沒有就用系統字。手機優先。 */
:root {
  --ink: #000000;
  --ink-2: #262626;
  --dim: #5f5f5f;
  --line: #dfdfdf;
  --bg: #ffffff;
  --soft: #f2f2f2;
  --ok: #006400;
  --err: #8b0000;
  --r-btn: 14px;
  --r-in: 4px;
  --wrap: 1180px;
  --font: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 16px/1.65 var(--font); }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3 { font-weight: 700; line-height: 1.2; letter-spacing: -0.01em; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 5.2vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.2rem); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }
.wrap--narrow { max-width: 760px; }
@media (min-width: 768px) { .wrap { padding: 0 32px; } }
.sec { padding-top: clamp(48px, 8vw, 96px); padding-bottom: clamp(48px, 8vw, 96px); }
.sec--soft { background: var(--soft); }
.sec--dark { background: #0d0d0d; color: #fff; }
.sec--dark .dim { color: #b5b5b5; }
.kick { font-size: .78rem; letter-spacing: .16em; text-transform: uppercase; color: var(--dim); margin-bottom: .8em; }
.sec--dark .kick { color: #b5b5b5; }
.lead { font-size: 1.12rem; color: var(--ink-2); max-width: 46em; }
.dim { color: var(--dim); }
.note { font-size: .9rem; color: var(--dim); }

/* 頁首、頁尾 */
.top { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.94); backdrop-filter: saturate(1.4) blur(8px); border-bottom: 1px solid var(--line); }
.top__in { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; }
.brand { font-weight: 700; letter-spacing: .12em; text-decoration: none; font-size: .95rem; white-space: nowrap; }
.nav { display: flex; align-items: center; gap: 4px 18px; font-size: .92rem; }
.nav a { text-decoration: none; padding: 6px 0; }
.nav a:hover { text-decoration: underline; text-underline-offset: 4px; }
.nav .btn { padding: 0 16px; min-height: 38px; }
@media (max-width: 600px) { .nav .hide-sm { display: none; } }
.foot { border-top: 1px solid var(--line); padding: 40px 0 56px; font-size: .9rem; color: var(--dim); }
.foot__cols { display: grid; gap: 24px; }
@media (min-width: 768px) { .foot__cols { grid-template-columns: 2fr 1fr 1fr; } }
.foot b { color: var(--ink); }
.foot ul { list-style: none; margin: 0; padding: 0; }
.foot li { margin: 0 0 6px; }

/* 按鈕 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 48px; padding: 0 26px; border-radius: var(--r-btn); border: 1px solid var(--ink); background: transparent; color: var(--ink); font: 600 1rem/1 var(--font); text-decoration: none; cursor: pointer; transition: background .15s, color .15s, border-color .15s; touch-action: manipulation; }
.btn:hover { background: rgba(0,0,0,.08); }
.btn--fill { background: var(--ink); color: #fff; }
.btn--fill:hover { background: var(--ink-2); border-color: var(--ink-2); }
.btn[disabled] { opacity: .55; cursor: progress; }
.sec--dark .btn { border-color: #fff; color: #fff; }
.sec--dark .btn--fill { background: #fff; color: #000; }
.row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

/* 首頁主視覺：去背圖放白底，不滿版拉伸（原圖 1800 寬） */
.hero { padding-top: clamp(24px, 5vw, 64px); padding-bottom: clamp(40px, 6vw, 80px); }
.hero__grid { display: grid; gap: 24px; align-items: center; }
@media (min-width: 900px) { .hero__grid { grid-template-columns: 1.15fr 1fr; gap: 48px; } }
.hero__img img { width: 100%; max-width: 900px; margin: 0 auto; }
.price { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px; margin: 18px 0 4px; }
.price b { font-size: 1.9rem; }
.price span { color: var(--dim); font-size: .95rem; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; padding: 0; list-style: none; }
.tags li { border: 1px solid var(--line); border-radius: 40px; padding: 4px 12px; font-size: .85rem; color: var(--ink-2); }

.strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.strip__in { display: grid; grid-template-columns: 1fr 1fr; }
@media (min-width: 900px) { .strip__in { grid-template-columns: repeat(4, 1fr); } }
.strip__in > div { padding: 20px 16px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); font-size: .88rem; color: var(--dim); }
.strip__in b { display: block; color: var(--ink); font-size: 1.15rem; margin-bottom: 2px; }

.feat { display: grid; gap: 28px; }
@media (min-width: 768px) { .feat { grid-template-columns: repeat(2, 1fr); gap: 36px 48px; } }
@media (min-width: 1100px) { .feat { grid-template-columns: repeat(3, 1fr); } }
.feat h3 { margin-bottom: .35em; }
.feat p { color: var(--ink-2); margin: 0; }

.split { display: grid; gap: 28px; align-items: center; }
@media (min-width: 900px) { .split { grid-template-columns: 1fr 1fr; gap: 56px; } .split--rev > :first-child { order: 2; } }
.split figure, figure.fig { margin: 0; }
.split img, .fig img { border-radius: 10px; }
figcaption { font-size: .88rem; color: var(--dim); margin-top: 10px; }
.sec--dark figcaption { color: #b5b5b5; }

.box { display: grid; gap: 10px; padding: 0; margin: 0; list-style: none; counter-reset: box; }
.box li { display: flex; gap: 14px; align-items: baseline; border-bottom: 1px solid var(--line); padding: 10px 0; }
.box li::before { counter-increment: box; content: counter(box, decimal-leading-zero); font-size: .8rem; color: var(--dim); min-width: 22px; }

.gallery { display: grid; gap: 12px; grid-template-columns: 1fr; }
@media (min-width: 700px) { .gallery { grid-template-columns: repeat(3, 1fr); } }
.gallery img { border-radius: 10px; aspect-ratio: 3 / 2; object-fit: cover; width: 100%; }

.fr { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 8px; width: 100%; max-width: min(100%, 1000px); }

/* 規格表 */
.specs { display: grid; gap: 32px; }
@media (min-width: 900px) { .specs { grid-template-columns: 1fr 1fr; gap: 48px; } }
.tbl { width: 100%; border-collapse: collapse; font-size: .95rem; }
.tbl th, .tbl td { text-align: left; vertical-align: top; padding: 11px 0; border-bottom: 1px solid var(--line); }
.tbl th { font-weight: 500; color: var(--dim); width: 44%; padding-right: 16px; }
.tbl--wide th { width: 32%; }

/* FAQ */
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; padding: 18px 32px 18px 0; font-weight: 600; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 14px; font-size: 1.4rem; font-weight: 400; }
.faq details[open] summary::after { content: "\2212"; }
.faq details > div { padding: 0 0 18px; color: var(--ink-2); }

/* 內頁 */
.page-head { padding-top: clamp(36px, 6vw, 72px); padding-bottom: 8px; }
.prose h2 { font-size: 1.4rem; margin-top: 2em; }
.prose h2:first-child { margin-top: 0; }
.prose ul { padding-left: 1.2em; }
.prose li { margin-bottom: .4em; }

/* 訂購頁 */
.order-grid { display: grid; gap: 32px; }
@media (min-width: 960px) { .order-grid { grid-template-columns: 1.3fr 1fr; gap: 48px; align-items: start; } .order-side { position: sticky; top: 84px; } }
.form { display: grid; gap: 16px; }
.form .two { display: grid; gap: 16px; }
@media (min-width: 640px) { .form .two { grid-template-columns: 1fr 1fr; } }
.form label { display: grid; gap: 6px; font-size: .9rem; font-weight: 500; }
.form label small { font-weight: 400; color: var(--dim); }
.form input, .form select, .form textarea { width: 100%; font: 400 16px/1.4 var(--font); color: var(--ink); background: #fff; border: 1px solid #bdbdbd; border-radius: var(--r-in); padding: 12px; }
.form textarea { resize: vertical; }
.form input:focus, .form select:focus, .form textarea:focus { outline: 2px solid var(--ink); outline-offset: 0; border-color: var(--ink); }
.prodline { display: flex; gap: 14px; align-items: center; border: 1px solid var(--line); border-radius: 10px; padding: 12px; }
.prodline img { width: 96px; height: 64px; object-fit: contain; flex: none; }
.prodline b { display: block; }
.sum { border: 1px solid var(--line); border-radius: 10px; padding: 18px; background: #fff; }
.sum h2 { font-size: 1.1rem; margin-bottom: 12px; }
.sum__row { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: .95rem; }
.sum__row small { color: var(--dim); }
.sum__total { font-weight: 700; font-size: 1.15rem; border-bottom: 0; padding-top: 12px; }
.sum__twd { margin: 10px 0 0; font-size: .88rem; color: var(--ink-2); background: var(--soft); border-radius: 8px; padding: 10px 12px; }
.err { color: var(--err); background: #fbeeee; border-radius: 8px; padding: 10px 12px; margin: 0; }
.okbox { border: 1px solid var(--line); border-left: 4px solid var(--ok); border-radius: 10px; padding: 18px 20px; margin-bottom: 24px; }
.okbox--fail { border-left-color: var(--err); }
.status dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 12px 0 0; font-size: .95rem; }
.status dt { color: var(--dim); }
.status dd { margin: 0; }
.lookup { margin-top: 40px; border-top: 1px solid var(--line); padding-top: 28px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn { transition: none; } }