/* 问渠科技 · 国内版官网样式（第 48 轮）。字体从本服务器 /vendor/ 取（第 34 轮）。 */
:root {
  --night: #08141b; --night-2: #0e1f28; --night-line: #1f3640; --night-ink: #e8f0f2; --night-muted: #8ea4ac;
  --paper: #f5f4ef; --surface: #fcfbf8; --ink: #11202a; --muted: #55666e; --line: #d8d5ca;
  --water: #1c9c8f; --water-ink: #0e6c63; --amber: #e8a50b; --amber-ink: #7c5600; --red: #c2412d;
  --serif-zh: "Noto Serif SC", "Songti SC", serif;
  --body: "Noto Sans SC", "IBM Plex Sans", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --paper: #0d191f; --surface: #132229; --ink: #e5edef; --muted: #94a6ad; --line: #26383f; --water-ink: #4fd1c1; --amber-ink: #f2c94c; color-scheme: dark; }
}
:root[data-theme="dark"] { --paper: #0d191f; --surface: #132229; --ink: #e5edef; --muted: #94a6ad; --line: #26383f; --water-ink: #4fd1c1; --amber-ink: #f2c94c; color-scheme: dark; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 16.5px/1.75 var(--body); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; }
img { max-width: 100%; display: block; }
:focus-visible { outline: 2px solid var(--water); outline-offset: 3px; }
.wrap { max-width: 1200px; margin: 0 auto; padding-inline: 20px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 12px; top: 12px; z-index: 50; background: var(--surface); padding: 6px 10px; }

/* ---------- 顶栏 ---------- */
header.top { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--night) 92%, transparent); backdrop-filter: blur(8px); color: var(--night-ink); border-bottom: 1px solid var(--night-line); }
header.top .wrap { display: flex; align-items: center; gap: 22px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; margin-right: auto; }
.brand svg { width: 30px; height: 30px; flex: none; }
.brand b { font: 700 19px/1 var(--serif-zh); letter-spacing: .06em; }
nav.main { display: flex; align-items: center; gap: 4px; }
nav.main > a, nav.main .dd > button { font: 500 15px/1 var(--body); color: var(--night-ink); text-decoration: none; background: none; border: 0; padding: 10px 12px; border-radius: 6px; cursor: pointer; }
nav.main > a:hover, nav.main .dd > button:hover, nav.main .dd.open > button { background: var(--night-2); }
nav.main a[aria-current="page"] { color: var(--water); }
.dd { position: relative; }
.dd > button::after { content: ""; display: inline-block; margin-left: 6px; border: 4px solid transparent; border-top-color: currentColor; transform: translateY(2px); }
.dd .menu { position: absolute; top: calc(100% + 6px); left: 0; min-width: 260px; background: var(--night-2); border: 1px solid var(--night-line); border-radius: 10px; padding: 8px; display: none; box-shadow: 0 18px 40px rgb(0 0 0 / .35); }
.dd.open .menu { display: block; }
@media (hover: hover) { .dd:hover .menu { display: block; } }
.dd .menu a { display: block; padding: 9px 12px; border-radius: 6px; text-decoration: none; font-size: 15px; }
.dd .menu a small { display: block; color: var(--night-muted); font-size: 13px; line-height: 1.4; }
.dd .menu a:hover { background: var(--night); }
.cta-top { font: 600 14px/1 var(--body); text-decoration: none; background: var(--water); color: #fff; padding: 11px 16px; border-radius: 6px; white-space: nowrap; }
.cta-top:hover { background: #17877c; }
.burger { display: none; background: none; border: 1px solid var(--night-line); color: var(--night-ink); border-radius: 6px; padding: 8px 10px; font: 500 14px/1 var(--body); }
@media (max-width: 980px) {
  .burger { display: inline-block; }
  nav.main { position: fixed; inset: 64px 0 auto 0; flex-direction: column; align-items: stretch; background: var(--night); border-bottom: 1px solid var(--night-line); padding: 8px 16px 16px; display: none; max-height: calc(100vh - 64px); overflow: auto; }
  nav.main.open { display: flex; }
  .dd .menu { position: static; display: block; box-shadow: none; border: 0; background: none; padding: 0 0 6px 12px; }
  .dd > button::after { display: none; }
  .cta-top { display: none; }
  nav.main .cta-m { display: block; text-align: center; margin-top: 8px; background: var(--water); color: #fff; }
}
@media (min-width: 981px) { nav.main .cta-m { display: none; } }

/* ---------- 首屏 ---------- */
.hero { position: relative; background: var(--night); color: var(--night-ink); overflow: hidden; }
.hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.hero .wrap { position: relative; z-index: 2; padding-block: 104px 72px; }
.eyebrow { font: 500 13px/1.4 var(--mono); letter-spacing: .16em; color: var(--water); margin: 0 0 18px; }
.hero h1 { margin: 0; font: 900 clamp(34px, 5.6vw, 70px)/1.16 var(--serif-zh); letter-spacing: .02em; max-width: 15em; text-wrap: balance; }
.hero h1 em { font-style: normal; color: var(--water); }
.hero h1 .nw { white-space: nowrap; }
@media (max-width: 520px) { .hero h1 .nw { white-space: normal; } }
.hero .lead { margin: 24px 0 0; max-width: 40em; font-size: clamp(16px, 1.6vw, 19px); color: #c9d6da; }
.hero .motto { margin: 30px 0 0; font: 500 15px/1.6 var(--serif-zh); color: var(--night-muted); }
.hero .btns { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.hero.sub .wrap { padding-block: 72px 56px; }
@media (max-width: 699px) { .hero:not(.sub) > .wrap:first-of-type { padding-top: 132px; } }
.hero.sub h1 { font-size: clamp(30px, 4.4vw, 52px); }
.crumbs { font: 400 13px/1.5 var(--mono); color: var(--night-muted); margin: 0 0 16px; }
.crumbs a { color: var(--night-muted); }

.btn { display: inline-flex; align-items: center; gap: 8px; font: 600 15px/1 var(--body); text-decoration: none; padding: 13px 20px; border-radius: 6px; border: 1px solid currentColor; color: inherit; background: transparent; cursor: pointer; }
.btn.solid { background: var(--water); border-color: var(--water); color: #fff; }
.btn.solid:hover { background: #17877c; border-color: #17877c; }
.btn:hover { border-color: var(--water); }
.btn.dark { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* ---------- 承诺三栏 ---------- */
.pillars { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--night-line); }
.pillars > div { padding: 26px 24px 30px 0; }
.pillars > div + div { padding-left: 24px; border-left: 1px solid var(--night-line); }
.pillars .no { font: 500 13px/1 var(--mono); color: var(--amber); }
.pillars h3 { margin: 10px 0 6px; font: 700 21px/1.35 var(--serif-zh); }
.pillars p { margin: 0; color: #b9c8cd; font-size: 15px; }
@media (max-width: 820px) { .pillars { grid-template-columns: 1fr; } .pillars > div + div { padding-left: 0; border-left: 0; border-top: 1px solid var(--night-line); } }

/* ---------- 正文分节 ---------- */
section.part { padding-block: 88px; border-bottom: 1px solid var(--line); }
section.part.alt { background: var(--surface); }
section.part.dark { background: var(--night); color: var(--night-ink); border-bottom-color: var(--night-line); }
.head { margin-bottom: 38px; max-width: 46em; }
.head .no { font: 500 13px/1 var(--mono); letter-spacing: .14em; color: var(--water-ink); }
section.dark .head .no { color: var(--water); }
.head h2 { margin: 10px 0 0; font: 700 clamp(28px, 3.6vw, 42px)/1.25 var(--serif-zh); text-wrap: balance; }
.head p { margin: 14px 0 0; color: var(--muted); font-size: 17.5px; }
section.dark .head p { color: var(--night-muted); }
@media (max-width: 820px) { section.part { padding-block: 60px; } }

/* 旗舰卡片 */
.flagships { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.flag { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; display: flex; flex-direction: column; }
.flag .shot { background: var(--night); aspect-ratio: 16 / 9; overflow: hidden; border-bottom: 1px solid var(--line); }
.flag .shot img { width: 100%; height: 100%; object-fit: cover; object-position: top left; }
.flag .txt { padding: 24px 26px 26px; display: flex; flex-direction: column; flex: 1; }
.tag { display: inline-block; font: 600 12px/1 var(--mono); letter-spacing: .08em; color: var(--amber-ink); border: 1px solid currentColor; border-radius: 999px; padding: 5px 10px; align-self: flex-start; }
.flag h3 { margin: 14px 0 8px; font: 700 26px/1.3 var(--serif-zh); }
.flag p { margin: 0 0 12px; color: var(--muted); }
.flag ul { margin: 0 0 18px; padding-left: 1.1em; }
.flag li { margin: 4px 0; }
.flag .more { margin-top: auto; font-weight: 600; color: var(--water-ink); text-decoration: none; }
.flag .more:hover { text-decoration: underline; }
@media (max-width: 900px) { .flagships { grid-template-columns: 1fr; } }

/* 普通卡片网格 */
.cards { display: grid; grid-template-columns: repeat(var(--n, 3), minmax(0, 1fr)); gap: 20px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 22px 22px 24px; display: flex; flex-direction: column; }
section.alt .card { background: var(--paper); }
section.dark .card { background: var(--night-2); border-color: var(--night-line); }
.card .shot { margin: -22px -22px 18px; border-radius: 12px 12px 0 0; overflow: hidden; aspect-ratio: 16 / 9; background: var(--night); }
.card .shot img { width: 100%; height: 100%; object-fit: cover; object-position: top left; }
.card h3 { margin: 0 0 8px; font: 700 20px/1.35 var(--serif-zh); }
.card p { margin: 0 0 10px; color: var(--muted); font-size: 15.5px; }
section.dark .card p { color: var(--night-muted); }
.card ul { margin: 0 0 12px; padding-left: 1.1em; font-size: 15.5px; }
.card .more { margin-top: auto; font-weight: 600; color: var(--water-ink); text-decoration: none; }
section.dark .card .more { color: var(--water); }
.card .more:hover { text-decoration: underline; }
@media (max-width: 980px) { .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .cards { grid-template-columns: 1fr; } }

/* 步骤 */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(var(--n, 4), minmax(0, 1fr)); gap: 0; counter-reset: s; }
.steps li { counter-increment: s; padding: 0 22px 0 0; position: relative; }
.steps li + li { padding-left: 22px; border-left: 1px solid var(--line); }
section.dark .steps li + li { border-left-color: var(--night-line); }
.steps li::before { content: counter(s, decimal-leading-zero); font: 500 13px/1 var(--mono); color: var(--water-ink); }
section.dark .steps li::before { color: var(--water); }
.steps b { display: block; margin: 8px 0 4px; font: 700 19px/1.35 var(--serif-zh); }
.steps span { color: var(--muted); font-size: 15px; }
section.dark .steps span { color: var(--night-muted); }
@media (max-width: 820px) { .steps { grid-template-columns: 1fr; gap: 18px; } .steps li + li { padding-left: 0; border-left: 0; } }

/* AI 做 / 人做 对照表与普通表 */
.tbl { overflow-x: auto; }
table.t { width: 100%; border-collapse: collapse; font-size: 15.5px; }
table.t th { text-align: left; font: 600 13px/1.3 var(--body); color: var(--muted); padding: 0 16px 10px 0; border-bottom: 2px solid var(--ink); }
table.t td { padding: 14px 16px 14px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
table.t td:first-child { font-weight: 600; }
table.ai th:first-child { color: var(--water-ink); }
table.ai th:last-child { color: var(--amber-ink); }
table.ai td:first-child { font-weight: 400; }
table.ai td { width: 50%; }

/* 图文两栏 */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 44px; align-items: center; }
.split.rev > :first-child { order: 2; }
.split h3 { margin: 0 0 10px; font: 700 26px/1.3 var(--serif-zh); }
.split p { color: var(--muted); }
.split ul { padding-left: 1.1em; }
.split + .split { margin-top: 64px; }
figure.shot { margin: 0; }
figure.shot img { border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 16px 40px rgb(8 20 27 / .14); }
figure.shot figcaption { margin-top: 10px; font: 400 13px/1.5 var(--mono); color: var(--muted); }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; gap: 22px; } .split.rev > :first-child { order: 0; } }

.gallery { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
@media (max-width: 760px) { .gallery { grid-template-columns: 1fr; } }

.note { margin-top: 22px; font-size: 14px; color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; padding: 0; list-style: none; }
.chips li { font: 500 14px/1 var(--body); border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; background: var(--surface); }
section.dark .chips li { border-color: var(--night-line); background: var(--night-2); }

/* 结尾号召 */
.cta { background: var(--night); color: var(--night-ink); padding-block: 72px; }
.cta .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
.cta h2 { margin: 0; font: 700 clamp(26px, 3.2vw, 36px)/1.3 var(--serif-zh); }
.cta p { margin: 8px 0 0; color: var(--night-muted); }

/* 文章（法律页等） */
.doc { max-width: 52em; }
.doc h2 { font: 700 22px/1.4 var(--serif-zh); margin: 40px 0 10px; }
.doc h3 { font: 700 18px/1.4 var(--body); margin: 26px 0 6px; }
.doc p, .doc li { color: var(--ink); }
.doc .meta { color: var(--muted); font-size: 14px; }

/* 表单 */
form.demo { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 20px; max-width: 760px; }
form.demo label { display: flex; flex-direction: column; gap: 6px; font-weight: 600; font-size: 15px; }
form.demo label.full, form.demo fieldset, form.demo .full { grid-column: 1 / -1; }
form.demo input[type=text], form.demo input[type=tel], form.demo input[type=email], form.demo select, form.demo textarea { font: 400 16px/1.4 var(--body); padding: 11px 12px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); color: var(--ink); }
form.demo textarea { min-height: 120px; resize: vertical; }
form.demo fieldset { border: 1px solid var(--line); border-radius: 8px; padding: 12px 16px; }
form.demo legend { font-weight: 600; padding: 0 6px; }
form.demo fieldset label { flex-direction: row; align-items: center; gap: 8px; font-weight: 400; display: inline-flex; margin: 4px 18px 4px 0; }
form.demo .agree { flex-direction: row; align-items: flex-start; gap: 10px; font-weight: 400; }
form.demo .hp { position: absolute; left: -9999px; }
form.demo .msg { grid-column: 1 / -1; min-height: 1.5em; font-weight: 600; }
form.demo .msg.ok { color: var(--water-ink); }
form.demo .msg.err { color: var(--red); }
@media (max-width: 640px) { form.demo { grid-template-columns: 1fr; } }

/* ---------- 页脚 ---------- */
footer.site { background: var(--night); color: var(--night-muted); padding-block: 56px 32px; font-size: 14.5px; }
footer.site .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; }
footer.site h3 { margin: 0 0 12px; font: 600 13px/1 var(--body); letter-spacing: .1em; color: var(--water); }
footer.site p { margin: 0 0 8px; }
footer.site a { color: var(--night-ink); text-decoration: none; }
footer.site a:hover { text-decoration: underline; }
footer.site ul { list-style: none; margin: 0; padding: 0; }
footer.site li { margin: 0 0 8px; }
footer.site .brandline { color: var(--night-ink); font: 700 18px/1.3 var(--serif-zh); margin-bottom: 10px; }
footer.site .ai { margin-top: 32px; padding-top: 16px; border-top: 1px solid var(--night-line); font-size: 13.5px; }
footer.site .base { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 6px 22px; align-items: center; font-size: 13.5px; }
footer.site .base img { display: inline-block; width: 16px; height: 16px; vertical-align: -3px; margin-right: 4px; }
@media (max-width: 900px) { footer.site .cols { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { footer.site .cols { grid-template-columns: 1fr; } }

.casecards .shot img { object-position: center; }
ol.plain { padding-left: 1.3em; }
ol.plain li { margin: 6px 0; }

form.demo select { font: 400 16px/1.4 var(--body); padding: 6px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--surface); color: var(--ink); margin-left: 6px; }