:root {
  --green: #1FA855;
  --green-d: #168a45;
  --green-soft: #e8f6ee;
  --purple: #32114D;
  --purple-soft: #f1ecf5;
  --text: #2A2526;
  --sub: #6d6567;
  --bg: #f6f5f7;
  --card: #ffffff;
  --line: #e6e1e8;
  --warn: #b25b00;
  --warn-soft: #fff3e3;
  --danger: #c62835;
  --radius: 16px;
  --font: "Plus Jakarta Sans", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, "DM Mono", monospace;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
[hidden] { display: none !important; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: var(--font); font-size: 15px; line-height: 1.55; }
a { color: var(--green-d); }
button { font-family: inherit; font-size: inherit; cursor: pointer; }
input { font-family: inherit; font-size: 16px; }

.btn { border: 0; border-radius: 999px; padding: 0 18px; height: 42px; font-weight: 600; white-space: nowrap; }
.btn-pri { background: var(--green); color: #fff; }
.btn-pri:active { background: var(--green-d); }
.btn-out { background: #fff; color: var(--text); border: 1px solid var(--line); }
.ghost-btn { background: transparent; border: 0; color: var(--sub); padding: 6px 8px; border-radius: 8px; }
.ghost-btn:hover { background: var(--purple-soft); }
.lang-btn { background: #fff; border: 1px solid var(--line); color: var(--purple); border-radius: 999px; padding: 4px 12px; font-size: 13px; font-weight: 600; }

/* ---------- 登录 ---------- */
.login { min-height: 100vh; min-height: 100dvh; display: flex; align-items: center; justify-content: center; padding: 24px 16px;
  background: linear-gradient(160deg, var(--purple) 0%, #4a1f6b 55%, var(--green-d) 140%); }
.login-card { position: relative; width: 100%; max-width: 380px; background: #fff; border-radius: 24px; padding: 32px 24px 22px; text-align: center; box-shadow: 0 24px 60px -24px rgba(0,0,0,.45); }
.login-logo { height: 64px; width: auto; }
.login h1 { font-size: 22px; margin: 12px 0 4px; color: var(--purple); }
.login .sub { color: var(--sub); margin: 0 0 18px; }
.login form { display: flex; flex-direction: column; gap: 10px; }
.login input { height: 48px; border: 1px solid var(--line); border-radius: 12px; padding: 0 14px; text-align: center; letter-spacing: 3px; font-weight: 600; text-transform: uppercase; outline: none; }
.login input:focus { border-color: var(--green); box-shadow: 0 0 0 3px var(--green-soft); }
.login .btn { height: 48px; }
.login .err { color: var(--danger); margin: 10px 0 0; font-size: 14px; }
.login .fine { color: var(--sub); font-size: 13px; margin: 16px 0 0; }
.login .lang-btn { position: absolute; top: 14px; right: 14px; }

/* ---------- 主界面 ---------- */
.app { max-width: 860px; margin: 0 auto; padding-bottom: 96px; }
.preview-bar { background: var(--warn-soft); color: var(--warn); font-size: 13px; padding: 8px 16px; text-align: center; }
.top { display: flex; align-items: center; gap: 10px; padding: 14px 16px 6px; }
.top .logo { height: 34px; width: auto; }
.brand { flex: 1; min-width: 0; }
.brand-name { font-weight: 700; color: var(--purple); font-size: 17px; line-height: 1.2; }
.who { color: var(--sub); font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.search { display: flex; gap: 8px; padding: 8px 16px 4px; }
.search input { flex: 1; min-width: 0; height: 44px; border: 1px solid var(--line); border-radius: 999px; padding: 0 16px; background: #fff; outline: none; }
.search input:focus { border-color: var(--green); box-shadow: 0 0 0 3px var(--green-soft); }
.search .btn { height: 44px; }

.tabs { display: flex; gap: 4px; padding: 10px 16px 0; border-bottom: 1px solid var(--line); }
.tab { flex: 0 0 auto; background: transparent; border: 0; border-bottom: 3px solid transparent; padding: 8px 14px 9px; color: var(--sub); font-weight: 600; }
.tab.on { color: var(--purple); border-bottom-color: var(--green); }

.chips { display: flex; gap: 8px; overflow-x: auto; padding: 10px 16px 2px; scrollbar-width: none; }
.chips::-webkit-scrollbar { display: none; }
.chips.sub { padding-top: 6px; }
.chip { flex: 0 0 auto; border: 1px solid var(--line); background: #fff; color: var(--text); border-radius: 999px; padding: 5px 13px; font-size: 13px; white-space: nowrap; }
.chip .n { color: var(--sub); font-size: 12px; margin-left: 4px; }
.chip.on { background: var(--purple); border-color: var(--purple); color: #fff; }
.chip.on .n { color: #d8cce3; }
.chips.sub .chip.on { background: var(--green); border-color: var(--green); }
.chips.sub .chip.on .n { color: #e3f5ea; }
@media (min-width: 720px) { .chips { flex-wrap: wrap; } }

.list { padding: 12px 16px 0; display: grid; gap: 12px; }
.list.videos { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 10px; }
@media (min-width: 720px) { .list.videos { grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; } }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 14px 12px; cursor: pointer; transition: border-color .15s, box-shadow .15s; }
.card:hover { border-color: #d4cbd9; box-shadow: 0 6px 18px -12px rgba(50,17,77,.35); }
.card .meta { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 12px; color: var(--sub); margin-bottom: 4px; }
.card .meta .prod { color: var(--purple); font-weight: 700; }
.card .ttl { font-weight: 700; font-size: 16px; line-height: 1.4; margin: 0; }
.card .sum { color: var(--sub); font-size: 14px; margin: 6px 0 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.tag { font-size: 12px; color: var(--sub); background: var(--bg); border-radius: 6px; padding: 1px 8px; }
.tag.intl { background: var(--warn-soft); color: var(--warn); border: 1px dashed #e8c48f; }
.card .acts { display: flex; gap: 8px; margin-top: 12px; }
.card .acts .btn { height: 36px; font-size: 14px; flex: 1; }

.badge { display: inline-block; font-size: 11px; font-weight: 700; border-radius: 6px; padding: 1px 7px; }
.badge.vendor { background: var(--warn-soft); color: var(--warn); }
.badge.review { background: #fdecee; color: var(--danger); }
.badge.expired { background: #eee; color: #777; }
.badge.internal { background: var(--purple-soft); color: var(--purple); }
.badge.excl { background: var(--green-soft); color: var(--green-d); }

.vcard { padding: 0; overflow: hidden; }
.vcard .thumb { position: relative; aspect-ratio: 16 / 9; background: #1d1022; }
.vcard .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.vcard .thumb .play { position: absolute; inset: 0; margin: auto; width: 52px; height: 52px; border-radius: 50%; background: rgba(31,168,85,.92); display: flex; align-items: center; justify-content: center; }
.vcard .thumb .play::after { content: ""; border-left: 16px solid #fff; border-top: 10px solid transparent; border-bottom: 10px solid transparent; margin-left: 4px; }
.vcard .vb { padding: 10px 12px 12px; }
.vcard .ttl { font-size: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.vcard .meta { font-size: 11px; }
.vcard .thumb .play { width: 40px; height: 40px; }
.vcard .thumb .play::after { border-left-width: 13px; border-top-width: 8px; border-bottom-width: 8px; }
@media (min-width: 720px) { .vcard .ttl { font-size: 15px; } .vcard .thumb .play { width: 52px; height: 52px; } }

.empty { text-align: center; color: var(--sub); padding: 40px 16px; }
.empty .btn { margin-top: 14px; display: inline-flex; align-items: center; text-decoration: none; }
.more { text-align: center; color: var(--sub); padding: 18px; font-size: 13px; }

/* ---------- 详情 ---------- */
.sheet { position: fixed; inset: 0; z-index: 40; background: var(--bg); overflow-y: auto; -webkit-overflow-scrolling: touch; }
.sheet-top { position: sticky; top: 0; z-index: 2; background: rgba(246,245,247,.94); backdrop-filter: blur(6px); border-bottom: 1px solid var(--line); padding: 8px 12px; }
.sheet-top > * { max-width: 860px; margin: 0 auto; }
.sheet-body { max-width: 860px; margin: 0 auto; padding: 16px 16px 110px; }
.sheet-body .crumb { font-size: 13px; color: var(--sub); }
.sheet-body .crumb b { color: var(--purple); }
.sheet-body h1 { font-size: 22px; line-height: 1.35; margin: 6px 0 8px; }
.sheet-body .info { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 12px; color: var(--sub); margin-bottom: 14px; }
.sheet-body .lead { font-size: 15px; color: var(--text); background: #fff; border-left: 4px solid var(--green); border-radius: 0 10px 10px 0; padding: 10px 14px; margin: 0 0 16px; }
.video-wrap { position: relative; aspect-ratio: 16 / 9; background: #000; border-radius: 14px; overflow: hidden; margin-bottom: 16px; }
.video-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.code-box { background: #fff; border: 1px solid var(--line); border-radius: 14px; margin: 0 0 18px; overflow: hidden; }
.code-box .hd { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 10px 8px 14px; border-bottom: 1px solid var(--line); background: var(--purple-soft); }
.code-box .hd span { font-weight: 700; color: var(--purple); font-size: 13px; }
.code-box .btn { height: 34px; font-size: 14px; }
.code-box pre { margin: 0; padding: 12px 14px; overflow-x: auto; font-family: var(--mono); font-size: 13px; line-height: 1.5; background: #fcfbfd; }
.help-box { margin-top: 28px; background: #fff; border: 1px dashed #cfc5d6; border-radius: 14px; padding: 14px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; }
.help-box .btn { text-decoration: none; display: inline-flex; align-items: center; }
.link-btn { display: inline-flex; align-items: center; gap: 6px; margin: 4px 0 8px; text-decoration: none; }

/* Markdown 正文 */
.md { font-size: 15px; line-height: 1.75; word-break: break-word; }
.md h2 { font-size: 18px; margin: 22px 0 8px; color: var(--purple); }
.md h3 { font-size: 16px; margin: 18px 0 6px; }
.md h4 { font-size: 15px; margin: 14px 0 4px; }
.md p { margin: 8px 0; }
.md ul, .md ol { padding-left: 22px; margin: 8px 0; }
.md li.sub { margin-left: 18px; list-style-type: circle; }
.md code { font-family: var(--mono); font-size: 13px; background: var(--purple-soft); border-radius: 4px; padding: 1px 5px; }
.md blockquote { margin: 12px 0; padding: 10px 14px; background: var(--green-soft); border-radius: 10px; color: #20422d; }
.md hr { border: 0; border-top: 1px solid var(--line); margin: 18px 0; }
.md img { max-width: 100%; height: auto; border-radius: 10px; border: 1px solid var(--line); display: block; margin: 10px 0; }
.md-table { overflow-x: auto; margin: 10px 0; }
.md table { border-collapse: collapse; width: 100%; font-size: 14px; background: #fff; }
.md th, .md td { border: 1px solid var(--line); padding: 6px 10px; text-align: left; vertical-align: top; }
.md th { background: var(--purple-soft); color: var(--purple); }
.md-code { position: relative; margin: 10px 0; }
.md-code pre { margin: 0; background: #fcfbfd; border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; overflow-x: auto; font-family: var(--mono); font-size: 13px; line-height: 1.5; }
.md-code pre code { background: none; padding: 0; }
.md-code pre.wrap { white-space: pre-wrap; font-family: var(--font); font-size: 14px; padding-right: 64px; }
.md-copy { position: absolute; top: 6px; right: 6px; border: 1px solid var(--line); background: #fff; color: var(--green-d); border-radius: 8px; font-size: 12px; padding: 3px 10px; font-weight: 600; }

.wa-fab { position: fixed; right: 16px; bottom: calc(18px + env(safe-area-inset-bottom)); z-index: 30; width: 54px; height: 54px; border-radius: 50%; background: #25D366; color: #fff; display: flex; align-items: center; justify-content: center; box-shadow: 0 10px 24px -10px rgba(0,0,0,.5); }
.toast { position: fixed; left: 50%; bottom: 90px; transform: translateX(-50%); z-index: 60; background: rgba(42,37,38,.92); color: #fff; padding: 10px 18px; border-radius: 10px; font-size: 14px; max-width: calc(100% - 32px); text-align: center; }