:root {
  --green: #1f6f5c;
  --green-dark: #154d40;
  --green-soft: #e8f2ee;
  --ink: #1d2a26;
  --muted: #5b6b66;
  --line: #d9e3df;
  --bg: #ffffff;
  --bg-alt: #f6f9f8;
  --radius: 10px;
  --max: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  line-height: 1.75; font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: var(--green); }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }

/* 頁首 */
header.site {
  position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--line); backdrop-filter: blur(6px);
}
header.site .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 16px; }
.brand { text-decoration: none; color: var(--ink); line-height: 1.2; display: flex; align-items: center; gap: 10px; }
.brand img { width: 38px; height: auto; }
.brand b { display: block; font-size: 18px; letter-spacing: .04em; }
.brand small { color: var(--muted); font-size: 11px; letter-spacing: .12em; }
nav.main { display: flex; gap: 22px; flex-wrap: wrap; }
nav.main a { color: var(--ink); text-decoration: none; font-size: 15px; }
nav.main a:hover, nav.main a.on { color: var(--green); }
.menu-btn { display: none; white-space: nowrap; flex-shrink: 0; background: none; border: 1px solid var(--line); border-radius: 6px; padding: 6px 10px; font-size: 15px; }

/* 主視覺 */
.hero {
  color: #fff; padding: 120px 0 110px;
  background: linear-gradient(rgba(10,40,32,.62), rgba(10,40,32,.72)), url(img/hero.jpg) center/cover;
}
.hero h1 { margin: 0 0 8px; font-size: clamp(28px, 5vw, 44px); letter-spacing: .08em; }
.hero p.slogan { margin: 0 0 28px; font-size: clamp(16px, 2.4vw, 20px); letter-spacing: .5em; opacity: .92; }
.btn {
  display: inline-block; padding: 10px 22px; border-radius: 999px; text-decoration: none;
  background: var(--green); color: #fff; font-weight: 600;
}
.btn.ghost { background: transparent; border: 1px solid rgba(255,255,255,.8); margin-left: 8px; }

/* 區塊 */
section { padding: 72px 0; }
section.alt { background: var(--bg-alt); }
.sec-title { text-align: center; margin: 0 0 40px; }
.sec-title h2 { margin: 0; font-size: 26px; letter-spacing: .06em; }
.sec-title span { color: var(--muted); font-size: 13px; letter-spacing: .2em; text-transform: uppercase; }

.about { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; }
.about img { border-radius: var(--radius); }

.grid { display: grid; gap: 20px; grid-template-columns: repeat(3, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px;
}
.card h3 { margin: 0 0 8px; font-size: 18px; color: var(--green-dark); }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card .no { color: var(--green); font-weight: 700; font-size: 13px; letter-spacing: .15em; }

.cases { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.cases li { background: #fff; border-left: 4px solid var(--green); border-radius: 6px; padding: 14px 18px; }

.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; text-align: center; }
.features div { padding: 28px 16px; border-radius: var(--radius); background: var(--green-soft); font-weight: 600; color: var(--green-dark); }

.quote {
  color: #fff; text-align: center; padding: 80px 0;
  background: linear-gradient(rgba(10,40,32,.7), rgba(10,40,32,.7)), url(img/banner2.jpg) center/cover;
}
.quote p { margin: 0 auto 6px; max-width: 760px; font-size: 18px; }
.quote small { opacity: .8; }

.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
.contact dl { margin: 0; align-content: start; display: grid; grid-template-columns: 5em 1fr; gap: 8px 12px; }
.contact dt { color: var(--muted); }
.contact dd { margin: 0; }
.todo { background: #fff6d6; border-radius: 4px; padding: 0 4px; }

/* 消息 */
.news { display: grid; gap: 18px; }
.news article { border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; }
.news h3 { margin: 0 0 4px; font-size: 18px; }
.news time, .tag { color: var(--muted); font-size: 13px; }
.tag { margin-left: 8px; background: var(--green-soft); color: var(--green-dark); padding: 1px 8px; border-radius: 999px; }
.news p { margin: 8px 0 0; color: var(--muted); }

.page-head { background: var(--green-dark); color: #fff; padding: 56px 0 44px; }
.page-head h1 { margin: 0; font-size: 28px; }
.prose { max-width: 760px; }
.links li { margin: 6px 0; }

footer.site { background: #10231e; color: #b9c8c3; font-size: 14px; padding: 28px 0; }
footer.site .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
footer.site a { color: #b9c8c3; text-decoration: none; margin-left: 14px; }

@media (max-width: 760px) {
  .menu-btn { display: block; }
  .brand small { font-size: 9px; letter-spacing: .06em; }
  nav.main { display: none; position: absolute; top: 64px; left: 0; right: 0; background: #fff;
             flex-direction: column; gap: 0; border-bottom: 1px solid var(--line); }
  nav.main.open { display: flex; }
  nav.main a { padding: 12px 16px; border-top: 1px solid var(--line); }
  .about, .contact { grid-template-columns: 1fr; }
  .grid, .features { grid-template-columns: 1fr; }
  section { padding: 52px 0; }
  .hero { padding: 88px 0 80px; }
  .hero p.slogan { letter-spacing: .25em; }
  .btn.ghost { margin: 10px 0 0; }
  footer.site a { margin: 0 14px 0 0; }
}
.case-groups { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-groups h3 { margin: 0 0 12px; font-size: 17px; color: var(--green-dark); }
.case-groups h3 small { color: var(--muted); font-weight: 400; margin-left: 6px; }
.case-groups .cases li { font-size: 15px; }
@media (max-width: 760px) { .case-groups { grid-template-columns: 1fr; } }

/* 聯絡表單 */
.contact-form { display: grid; gap: 12px; margin-top: 8px; }
.contact-form label { display: grid; gap: 4px; font-size: 14px; color: var(--muted); }
.contact-form label em { color: #c0392b; font-style: normal; }
.contact-form input, .contact-form select, .contact-form textarea {
  font: inherit; color: var(--ink); padding: 9px 12px; border: 1px solid var(--line);
  border-radius: 8px; background: #fff; width: 100%;
}
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { outline: 2px solid var(--green-soft); border-color: var(--green); }
.contact-form .row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.contact-form .hint { color: var(--muted); margin-top: -6px; }
.contact-form .consent { display: flex; gap: 8px; align-items: flex-start; font-size: 13px; }
.contact-form .consent input { width: auto; margin-top: 4px; }
.contact-form .hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.contact-form button { border: 0; cursor: pointer; justify-self: start; font: inherit; font-weight: 600; }
.contact-form button:disabled { opacity: .6; cursor: default; }
.form-msg { margin: 0; font-size: 14px; min-height: 1.4em; }
.form-msg.ok { color: var(--green); }
.form-msg.err { color: #c0392b; }
@media (max-width: 760px) { .contact-form .row2 { grid-template-columns: 1fr; } }

/* 線上客服 */
.chat-root { position: fixed; right: 16px; bottom: 16px; z-index: 50; font-size: 15px; }
.chat-fab { background: var(--green); color: #fff; border: 0; border-radius: 999px; padding: 12px 18px;
  font: inherit; font-weight: 600; box-shadow: 0 6px 20px rgba(0,0,0,.18); cursor: pointer; }
.chat-panel { width: min(360px, calc(100vw - 32px)); height: min(540px, calc(100vh - 32px)); background: #fff;
  border-radius: 14px; box-shadow: 0 12px 40px rgba(0,0,0,.25); display: flex; flex-direction: column; overflow: hidden; }
.chat-panel[hidden], .chat-fab[hidden], .chat-start[hidden] { display: none; }
.chat-head { background: var(--green-dark); color: #fff; padding: 12px 14px; display: flex; align-items: baseline; gap: 8px; }
.chat-head span { font-size: 12px; opacity: .8; }
.chat-close { margin-left: auto; background: none; border: 0; color: #fff; font-size: 16px; cursor: pointer; }
.chat-body { flex: 1; overflow-y: auto; padding: 12px; background: var(--bg-alt); display: flex; flex-direction: column; gap: 8px; }
.chat-msg { max-width: 85%; padding: 8px 12px; border-radius: 12px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
.chat-msg.staff { background: #fff; border: 1px solid var(--line); align-self: flex-start; }
.chat-msg.visitor { background: var(--green); color: #fff; align-self: flex-end; }
.chat-start { padding: 10px 12px 0; display: grid; gap: 6px; border-top: 1px solid var(--line); }
.chat-start input { font: inherit; font-size: 14px; padding: 7px 10px; border: 1px solid var(--line); border-radius: 8px; }
.chat-consent { font-size: 12px; color: var(--muted); display: flex; gap: 6px; align-items: flex-start; }
.chat-consent input { margin-top: 3px; }
.chat-input { display: flex; gap: 8px; padding: 10px 12px; border-top: 1px solid var(--line); }
.chat-input textarea { flex: 1; font: inherit; font-size: 14px; resize: none; padding: 7px 10px; border: 1px solid var(--line); border-radius: 8px; }
.chat-input button { background: var(--green); color: #fff; border: 0; border-radius: 8px; padding: 0 14px; font: inherit; font-weight: 600; cursor: pointer; }
.chat-input button:disabled { opacity: .6; }
.chat-err { margin: 0; padding: 0 12px 8px; font-size: 13px; color: #c0392b; min-height: 0; }
.chat-err:empty { display: none; }