/* 專案捐款頁共用樣式（取代 Bootstrap、Astroid 版型與 Font Awesome）
 * 各頁主色由 <body style="--accent:…"> 設定 */

:root {
    --accent: #13a79d;
    --tag: #d64444;
    --text: #2c2e36;
    --muted: #5f6470;
    --line: #d9dce1;
    --cta: #ffc107;
    --topbar: #adb5bd;
    --footer-light: #a2938c;
    --footer-dark: #65493b;
    --wrap: 1140px;
    --radius: 8px;
    --font: "Noto Sans TC", "Microsoft JhengHei", "PingFang TC", sans-serif;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
    /* 由各頁的 --accent 推算；需寫在 body（與 inline --accent 同一層）才會用到該頁的主色 */
    --accent-dark: color-mix(in srgb, var(--accent) 75%, #000);
    --accent-soft: color-mix(in srgb, var(--accent) 12%, #fff);
    margin: 0;
    font-family: var(--font);
    font-size: 1rem;
    line-height: 1.75;
    color: var(--text);
    background: #fff;
    overflow-x: hidden;
}

img { max-width: 100%; height: auto; }
a { color: inherit; }
a:hover { color: #506aa0; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }

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

.skip-link { position: absolute; left: 8px; top: -60px; z-index: 1000; padding: 8px 12px; background: #fff; border-radius: var(--radius); }
.skip-link:focus { top: 8px; }

.icon { width: 1em; height: 1em; fill: currentColor; vertical-align: -0.125em; flex: none; }

/* ── 頁首 ───────────────────────────────────────── */

.topbar { background: var(--topbar); color: #fff; font-size: 0.9rem; padding: 4px 0; }
.topbar a, .topbar a:hover { color: #fff; text-decoration: none; }
.topbar__inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.topbar ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 20px; }
.topbar__contact li { display: inline-flex; align-items: center; gap: 6px; }
.topbar__social .icon { width: 1.15em; height: 1.15em; }
@media (max-width: 991.98px) { .topbar { display: none; } }

.site-header {
    position: sticky; top: 0; z-index: 50;
    background: #fff; border-bottom: 1px solid var(--line);
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}
.site-header__inner { display: flex; align-items: center; justify-content: space-between; min-height: 72px; gap: 16px; }
.site-header__logo { display: flex; align-items: center; padding: 8px 0; }
.site-header__logo img { width: auto; max-height: 56px; }

.site-header__toggle {
    display: none; width: 44px; height: 44px; padding: 0; border: 0; background: none; cursor: pointer; border-radius: var(--radius);
}
.burger, .burger::before, .burger::after {
    display: block; width: 26px; height: 3px; margin: 0 auto; background: var(--text); border-radius: 2px;
    transition: transform 0.2s, opacity 0.2s; position: relative;
}
.burger::before, .burger::after { content: ""; position: absolute; left: 0; }
.burger::before { top: -8px; }
.burger::after { top: 8px; }
.nav-open .burger { background: transparent; }
.nav-open .burger::before { transform: translateY(8px) rotate(45deg); }
.nav-open .burger::after { transform: translateY(-8px) rotate(-45deg); }

.site-nav ul { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 4px; }
.site-nav a { display: block; padding: 8px 12px; text-decoration: none; color: var(--text); white-space: nowrap; }
.site-nav a:hover, .site-nav a:focus-visible { color: #f39800; }
.site-nav .site-nav__donate { display: inline-flex; align-items: center; gap: 6px; background: #00a89d; color: #fff; border-radius: 10px; }
.site-nav .site-nav__donate:hover { color: #fff; background: #008f86; }

@media (max-width: 991.98px) {
    .site-header__toggle { display: block; order: -1; }
    .site-header__logo { margin: 0 auto; }
    .site-header__logo img { max-height: 44px; }
    .site-nav {
        position: fixed; inset: 0 auto 0 0; width: min(300px, 85vw); z-index: 60;
        background: #fff; box-shadow: 4px 0 16px rgba(0, 0, 0, 0.15);
        padding: 72px 16px 24px; overflow-y: auto;
        transform: translateX(-100%); visibility: hidden; transition: transform 0.25s, visibility 0.25s;
    }
    .nav-open .site-nav { transform: none; visibility: visible; }
    .site-nav ul { flex-direction: column; align-items: stretch; gap: 0; }
    .site-nav li + li { border-top: 1px solid var(--line); }
    .site-nav a { padding: 12px 8px; }
    .site-nav .site-nav__donate { margin-top: 12px; justify-content: center; }
    .site-header__toggle { position: relative; z-index: 70; }
    .nav-open::after { content: ""; position: fixed; inset: 0; z-index: 40; background: rgba(0, 0, 0, 0.35); }
}

/* ── 內容 ───────────────────────────────────────── */

.campaign { max-width: var(--wrap); margin: 0 auto; padding: 32px 16px 48px; }
@media (min-width: 768px) { .campaign { padding-top: 48px; } }

.campaign > * + * { margin-top: 0; }
.campaign p { margin: 0 0 1em; }
.campaign figure { margin: 0; }

.block { margin-bottom: 3rem; }
.block--tight { margin-bottom: 1.5rem; }
.center { text-align: center; }
.lead { font-size: 1.15rem; }
.strong { font-weight: 700; }
.accent { color: var(--accent); }
.alert { color: #d00; font-weight: 700; }
.small { font-size: 0.85rem; }

.img { display: block; margin: 0 auto; border-radius: 0.25rem; }
.banner { display: block; width: 100%; margin: 0 auto 3rem; border-radius: 0.25rem; }

.page-title { margin: 0 0 1rem; font-size: clamp(1.4rem, 3.5vw, 1.9rem); font-weight: 700; line-height: 1.4; text-align: center; color: var(--accent); }
.page-title--plain { color: var(--text); }
.page-title--big { font-size: clamp(2rem, 6vw, 3rem); text-align: left; }

/* 標題左右裝飾線 */
.ornate { display: flex; align-items: center; justify-content: center; gap: 0.75em; }
.ornate::before, .ornate::after { content: ""; flex: none; width: clamp(24px, 6vw, 56px); height: 3px; background: currentColor; }
@media (max-width: 575.98px) { .ornate::before, .ornate::after { display: none; } }

.badge-line { display: inline-block; padding: 2px 10px; background: var(--accent); color: #fff; font-size: 1.1rem; }

.section-title { margin: 0 0 0.75rem; font-size: clamp(1.3rem, 3vw, 1.5rem); font-weight: 700; line-height: 1.4; color: var(--accent); }
.section-title::before { content: "▌"; }
.text-lg { font-size: 1.15rem; }

/* 文字＋圖片兩欄，手機時上下排列 */
.split { display: grid; gap: 24px; align-items: center; margin-bottom: 3rem; }
@media (min-width: 992px) {
    .split { grid-template-columns: 1fr 1fr; }
    .split--8-4 { grid-template-columns: 2fr 1fr; }
    .split--4-8 { grid-template-columns: 1fr 2fr; }
    .split--10-2 { grid-template-columns: 5fr 1fr; }
    .split--flip > :first-child { order: 2; }
}
.split--always { grid-template-columns: 2fr 1fr; }

.quote { margin: 0 0 3rem; text-align: center; font-size: 1.15rem; }
.quote p { margin: 0 0 0.5rem; font-weight: 700; }
.quote footer { font-weight: 700; }
.quote--left p { text-align: left; }

.video { position: relative; margin: 0 0 3rem; aspect-ratio: 16 / 9; }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.cta { margin: 0 0 3rem; text-align: center; }

.list-plain { list-style: none; margin: 0 0 1em; padding: 0; }

/* 外框區塊（活動辦法等） */
.box { margin-bottom: 1.5rem; border: 3px solid var(--accent); }
.box__title { margin: 0; padding: 8px 16px; background: var(--accent); color: #fff; font-size: 1.35rem; font-weight: 700; text-align: center; }
.box__body { padding: 16px; }
@media (min-width: 768px) { .box__body { padding: 16px 48px 24px; } }
.box dl { margin: 0 0 1rem; }
.box dt { color: var(--accent); }
.box dt::before { content: "◆"; }
.box dd { margin: 0 0 0.75rem; }

/* 贈品介紹：桌機時文字與圖片交錯，下方加淡色線條 */
.gift { display: grid; gap: 16px; align-items: center; margin: 1.5rem 0; }
.gift h4 { margin: 0; font-size: 1rem; font-weight: 700; }
.gift p { margin: 0; }
@media (min-width: 992px) {
    .gift { grid-template-columns: 1fr 1fr; gap: 32px; }
    .gift--flip > :first-child { order: 2; }
    .gift__text { padding: 0 10%; border-bottom: 3px solid color-mix(in srgb, var(--accent) 55%, #fff); padding-bottom: 12px; }
}

.permit { margin: 1rem 0 3rem; text-align: center; color: var(--accent); }

/* ── 按鈕 ───────────────────────────────────────── */

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    min-height: 44px; padding: 8px 20px; border: 2px solid transparent; border-radius: 6px;
    font: inherit; font-weight: 500; line-height: 1.4; text-decoration: none; cursor: pointer;
}
.btn--accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn--accent:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; }
.btn--outline { background: #fff; border-color: var(--accent); color: var(--accent); }
.btn--outline:hover { background: var(--accent-soft); color: var(--accent-dark); }
.btn--cta { background: var(--cta); border-color: var(--cta); color: #212529; }
.btn--cta:hover { background: #e0a800; border-color: #d39e00; color: #212529; }

/* ── 捐款表單 ───────────────────────────────────── */

.donate { margin: 0 0 1.5rem; scroll-margin-top: 96px; }
.donate__form { border: 3px solid var(--accent); }
.donate__title { margin: 0; padding: 8px 16px; background: var(--accent); color: #fff; font-size: 1.3rem; font-weight: 700; line-height: 1.4; text-align: center; }
.donate__body { padding: 20px 16px; }
@media (min-width: 768px) { .donate__body { padding: 24px 32px; } }
.donate__intro { margin-bottom: 1rem; color: var(--accent); font-weight: 700; font-size: 1.1rem; }
.donate__intro p { margin: 0; }

.donate__group { margin: 0 0 1.25rem; padding: 0; border: 0; min-width: 0; }
.donate__legend { padding: 0; margin-bottom: 0.5rem; font-size: 1.15rem; font-weight: 700; color: var(--accent); }
.donate__legend::before { content: "▌"; }
.donate__legend em { font-style: normal; color: #d00; }

.donate__option { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 10px; padding: 6px 0; }
.donate__option input[type="radio"] { flex: none; width: 1.15em; height: 1.15em; margin: 0; accent-color: var(--accent); transform: translateY(0.15em); }
.donate__option label { flex: 1 1 0; min-width: 0; cursor: pointer; }
.donate__option:has(.donate__custom) label { flex: 0 1 auto; }
.donate__tag { margin-right: 0.5em; color: var(--tag); font-weight: 700; }
.donate__amount { margin: 0 0.25em; font-size: 1.3em; }
.donate__custom { display: block; flex: 1 1 240px; }
.donate__custom > span { margin-left: 6px; }
@media (max-width: 575.98px) {
    /* 手機：自訂金額欄位換行時與選項文字對齊 */
    .donate__custom { flex-basis: 100%; padding-left: calc(1.15em + 10px); }
}
.donate__custom input {
    width: 9em; min-height: 40px; padding: 4px 10px;
    border: 1px solid #ced4da; border-radius: 4px; font: inherit;
}

.donate__start { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 0 0 1rem; font-weight: 700; }
.donate__start select, .donate__field input {
    min-height: 40px; padding: 4px 10px; border: 1px solid #ced4da; border-radius: 4px; font: inherit; background: #fff;
}

.donate__field { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; margin: 0 0 1rem; }
.donate__field label { font-weight: 700; }
.donate__field input { flex: 1 1 280px; }
.donate__field small { flex-basis: 100%; color: var(--muted); }

.donate [aria-invalid="true"] { border-color: #d00; box-shadow: 0 0 0 2px rgba(221, 0, 0, 0.2); }

.donate__after { margin: 0 0 1rem; }
.donate__after p { margin: 0 0 0.5rem; }

.donate__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 1rem 0 0; }

.donate__error { margin: 1rem 0 0; padding: 10px 14px; border-radius: 4px; background: #fdecec; color: #b00020; font-weight: 700; text-align: center; }
.donate__error[hidden] { display: none; }

/* 付款方式按鈕（康橋專案） */
.donate__channels { display: grid; gap: 32px; justify-items: center; padding-top: 36px; }
.donate__channel-group {
    position: relative; width: 100%; max-width: 760px;
    padding: 36px 16px 20px; border: 5px solid var(--accent-soft); border-radius: 20px;
}
.donate__channel-title {
    position: absolute; top: -22px; left: 50%; transform: translateX(-50%);
    margin: 0; padding: 2px 28px; border-radius: 50px; white-space: nowrap;
    background: var(--accent-soft); color: #fff; font-size: 1.3rem; font-weight: 700;
}
.donate__channel-buttons { display: grid; gap: 12px; }
@media (min-width: 576px) { .donate__channel-buttons { grid-template-columns: 1fr 1fr; } }
.donate__channel {
    min-height: 60px; border: 0; border-radius: 10px; cursor: pointer;
    background: var(--accent); color: #fff; font: inherit; font-size: 1.3rem; font-weight: 700;
}
.donate__channel:hover { background: var(--accent-dark); }

/* ── 頁尾 ───────────────────────────────────────── */

.watering { display: flex; justify-content: flex-end; padding-bottom: 32px; }
.watering a { position: relative; display: block; width: 66%; }
@media (min-width: 768px) { .watering a { width: 50%; } }
.watering img { display: block; width: 100%; }
.watering__hover { position: absolute; inset: 0; opacity: 0; transition: opacity 0.2s; }
.watering a:hover .watering__hover, .watering a:focus-visible .watering__hover { opacity: 1; }

.site-footer { display: grid; grid-template-columns: repeat(3, 1fr); align-items: end; }
.site-footer img { display: block; width: 100%; }
.site-footer__info { padding: 0 8px 12px; text-align: center; font-weight: 700; }
.site-footer__info p { margin: 0; font-size: 1.05rem; }
.site-footer__info .site-footer__name { font-size: 1.6rem; }
.site-footer__band {
    position: relative; height: 150px;
    background: linear-gradient(to bottom, var(--footer-light) 0 25%, var(--footer-dark) 25% 100%);
}
.site-footer__band span {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    white-space: nowrap; color: #fff;
}
@media (max-width: 767.98px) {
    .site-footer__info, .site-footer__band span { display: none; }
    .site-footer__band { height: 60px; }
}
@media (min-width: 768px) and (max-width: 1199.98px) {
    .site-footer__info p { font-size: 0.9rem; }
    .site-footer__info .site-footer__name { font-size: 1.2rem; }
    .site-footer__band span { white-space: normal; width: 90%; text-align: center; font-size: 0.85rem; }
}

.back-to-top {
    position: fixed; right: 20px; bottom: 20px; z-index: 40;
    display: flex; align-items: center; justify-content: center; width: 44px; height: 44px;
    border-radius: 2px; background: #ffb400; color: #fff;
    opacity: 0; visibility: hidden; transition: opacity 0.2s, visibility 0.2s;
}
.back-to-top:hover { color: #fff; }
.back-to-top .icon { width: 22px; height: 22px; }
.back-to-top.is-visible { opacity: 1; visibility: visible; }