/* 一格数码 · 网站样式。颜色、字号、间距全部来自 02-设计规范/一格数码VI规范-v2.md */

:root {
  --paper: #F8F6F1;
  --paper-warm: #F6ECE2;
  --ink-bg: #171513;
  --ink-card: #23201D;
  --ink: #141414;
  --muted: #6F6A63;
  --faint: #A9A29A;
  --line: rgba(20, 20, 20, .12);
  --line-dark: rgba(243, 238, 232, .12);
  --on-dark: #F3EEE8;
  --on-dark-muted: #A59D94;
  --green: #C8FF00;
  --claude: #D97757;
  --codex: #0B6BE0;
  --ok: #2F8F5B;
  --warn: #C8862A;
  --alert: #D9483B;
  --accent: var(--ink);

  --font: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  --shadow: 0 1px 0 rgba(255, 255, 255, .9) inset, 0 1px 2px rgba(60, 30, 10, .06), 0 22px 44px -18px rgba(90, 45, 15, .28);
  --shadow-dark: 0 1px 0 rgba(255, 255, 255, .06) inset, 0 24px 48px -20px rgba(0, 0, 0, .6);

  --gutter: 44px;
  --block: 84px;
}

@media (max-width: 760px) {
  :root { --gutter: 16px; --block: 56px; }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; height: auto; }

.wrap { max-width: calc(1120px + var(--gutter) * 2); margin: 0 auto; padding: 0 var(--gutter); }
.screen { padding: var(--block) 0; }
.screen.warm { background: var(--paper-warm); }
.screen.dark { background: var(--ink-bg); color: var(--on-dark); }
.theme-claude { --accent: var(--claude); }
.theme-codex { --accent: var(--codex); background: #F7F9FC; }
.theme-codex.alt { background: #EDF2F8; }

/* ---------- 顶部导航 ---------- */
.nav { position: sticky; top: 0; z-index: 20; background: rgba(248, 246, 241, .92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; height: 68px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { height: 28px; width: auto; display: block; }
.brand span { font-family: var(--mono); font-size: 11px; letter-spacing: .18em; color: var(--muted); }
.nav-links { display: flex; gap: 28px; margin-left: auto; align-items: center; }
.nav-links a { text-decoration: none; font-size: 15px; color: var(--ink); }
.nav-links a:hover, .nav-links a.on { text-decoration: underline; text-underline-offset: 6px; }
.nav-links a.btn-primary { color: var(--paper); text-decoration: none; }
.nav-toggle { display: none; margin-left: auto; background: none; border: 1px solid var(--ink); border-radius: 12px; width: 44px; height: 40px; font-size: 18px; cursor: pointer; }
@media (max-width: 860px) {
  .brand span { display: none; }
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; left: 0; right: 0; top: 68px; flex-direction: column; align-items: stretch; gap: 0; background: var(--paper); border-bottom: 1px solid var(--line); padding: 8px var(--gutter) 20px; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav-links .btn { margin-top: 16px; border-bottom: 0; }
}

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 48px; padding: 0 22px; border-radius: 14px; font-size: 16px; font-weight: 600; text-decoration: none; border: 1px solid var(--ink); cursor: pointer; white-space: nowrap; }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: #2a2724; }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: rgba(20, 20, 20, .05); }
.nav .btn { height: 40px; font-size: 15px; padding: 0 16px; }
.dark .btn-primary, .btn-light { background: var(--on-dark); color: var(--ink); border-color: var(--on-dark); }
.dark .btn-ghost { color: var(--on-dark); border-color: rgba(243, 238, 232, .5); }
.link-arrow { font-weight: 600; text-decoration: none; }
.link-arrow::after { content: " →"; }
.link-arrow:hover { text-decoration: underline; text-underline-offset: 5px; }

/* ---------- 标题与章节头 ---------- */
.eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: var(--muted); }
.dark .eyebrow { color: var(--on-dark-muted); }
.section-head { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; }
.section-head .no { font-family: var(--mono); font-size: 14px; color: var(--accent); font-weight: 600; }
.dark .section-head .no { color: var(--green); }
.section-head .label { color: var(--muted); font-size: 14px; white-space: nowrap; }
.dark .section-head .label { color: var(--on-dark-muted); }
.section-head::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.dark .section-head::after { background: var(--line-dark); }
h1, h2, h3 { margin: 0; line-height: 1.25; }
.h-hero { font-size: 56px; font-weight: 900; letter-spacing: -.01em; }
.h-block { font-size: 40px; font-weight: 700; }
.h-card { font-size: 22px; font-weight: 700; }
.lead { font-size: 20px; color: var(--muted); max-width: 40em; margin: 16px 0 0; }
.dark .lead { color: var(--on-dark-muted); }
.small { font-size: 13px; color: var(--faint); }
@media (max-width: 760px) {
  .h-hero { font-size: 36px; }
  .h-block { font-size: 28px; }
  .h-card { font-size: 20px; }
  .lead { font-size: 17px; }
}
.block-title { margin-bottom: 40px; }

/* ---------- 首屏 ---------- */
.hero { padding: 96px 0 var(--block); }
.hero .tag { display: inline-block; font-family: var(--mono); font-size: 12px; letter-spacing: .18em; background: var(--ink); color: var(--paper); border-radius: 999px; padding: 4px 14px; margin-bottom: 24px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
@media (max-width: 900px) { .hero { padding-top: 56px; } .hero-grid { grid-template-columns: 1fr; gap: 32px; } }

/* ---------- 卡片 ---------- */
.card { background: linear-gradient(180deg, #FFFFFF, #FCF8F3); border-radius: 24px; box-shadow: var(--shadow); padding: 28px; }
.card-dark { background: var(--ink-card); border-radius: 24px; box-shadow: var(--shadow-dark); padding: 28px; color: var(--on-dark); }
.grid { display: grid; gap: 14px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) { .grid-3, .grid-2 { grid-template-columns: 1fr; } }

.icon-block { width: 52px; height: 52px; border-radius: 15px; display: grid; place-items: center; background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); margin-bottom: 18px; }
.icon-block svg { width: 26px; height: 26px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- 指导三档卡 ---------- */
.tiers { align-items: stretch; }
.tier { display: grid; grid-template-rows: auto auto auto 1fr auto; gap: 0; }
.tier .t-name { font-size: 22px; font-weight: 700; display: flex; align-items: center; gap: 10px; }
.tier .badge { font-size: 12px; font-weight: 700; background: var(--green); color: var(--ink); border-radius: 999px; padding: 2px 10px; }
.tier .t-price { font-size: 40px; font-weight: 800; margin: 18px 0 4px; line-height: 1.1; }
.tier .t-price small { font-size: 18px; font-weight: 700; margin-right: 2px; }
.tier .t-price.pending { font-size: 30px; }
.tier .t-fit { color: var(--on-dark-muted); font-size: 15px; min-height: 3.5em; margin: 6px 0 18px; }
.check-list { list-style: none; padding: 12px 0 0; margin: 0; }
.check-list li { padding: 6px 0 6px 28px; position: relative; }
.check-list li::before { content: ""; position: absolute; left: 3px; top: 14px; width: 12px; height: 7px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }
.tier .t-list { list-style: none; padding: 18px 0 0; margin: 0 0 24px; border-top: 1px solid var(--line-dark); font-size: 15px; }
.tier .t-list li { padding: 5px 0 5px 26px; position: relative; }
.tier .t-list li::before { content: ""; position: absolute; left: 2px; top: 13px; width: 12px; height: 7px; border-left: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(-45deg); opacity: .8; }
.tier .t-list li.key { font-weight: 700; }
.tier .btn { width: 100%; }
.card-dark.tier .t-price { color: var(--green); }
.card.tier { color: var(--ink); }
.card.tier .t-price { color: var(--ink); }
.card.tier .t-fit { color: var(--muted); }
.card.tier .t-list { border-top-color: var(--line); }
.card-dark.tier .btn { background: transparent; color: var(--on-dark); border-color: rgba(243, 238, 232, .5); }
.card.tier .btn { background: var(--ink); color: var(--paper); }
.tier-note { margin-top: 20px; color: var(--on-dark-muted); font-size: 14px; }

/* ---------- 交付流程条 ---------- */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; counter-reset: step; }
.flow li { list-style: none; position: relative; padding-top: 56px; }
.flow li::before { counter-increment: step; content: "0" counter(step); position: absolute; top: 0; left: 0; width: 40px; height: 40px; border-radius: 50%; background: var(--ink); color: var(--paper); font-family: var(--mono); font-size: 13px; display: grid; place-items: center; }
.flow li::after { content: ""; position: absolute; top: 20px; left: 48px; right: 8px; height: 1px; background: var(--line); }
.flow li:last-child::after { display: none; }
.flow b { display: block; font-size: 18px; }
.flow span { color: var(--muted); font-size: 14px; display: block; margin-top: 4px; }
.flow { padding: 0; margin: 0; }
@media (max-width: 860px) {
  .flow { grid-template-columns: 1fr; gap: 0; }
  .flow li { padding: 6px 0 22px 60px; }
  .flow li::after { top: 44px; bottom: 0; left: 20px; right: auto; width: 1px; height: auto; }
}

/* ---------- 终端截图框 ---------- */
.term { background: var(--ink-bg); border-radius: 20px; box-shadow: var(--shadow-dark); overflow: hidden; }
.term-bar { display: flex; gap: 8px; padding: 14px 16px; border-bottom: 1px solid var(--line-dark); }
.term-bar i { width: 11px; height: 11px; border-radius: 50%; background: #4A4540; }
.term pre { margin: 0; padding: 20px 22px 24px; font-family: var(--mono); font-size: 13.5px; line-height: 1.8; color: #CFC8C0; white-space: pre-wrap; word-break: break-word; }
.term .p { color: var(--on-dark-muted); }
.term .ok { color: #5FC48C; }
.term-caption { margin-top: 10px; }

/* ---------- 场景卡 ---------- */
.scene .tagline { display: inline-block; font-size: 13px; border: 1px solid var(--accent); color: var(--accent); border-radius: 999px; padding: 1px 12px; margin-bottom: 14px; }
.scene .tagline.first { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.scene .cmp { margin-top: 16px; display: grid; gap: 8px; font-size: 15px; }
.scene .cmp div { display: grid; grid-template-columns: 52px 1fr; gap: 8px; }
.scene .cmp em { font-style: normal; font-size: 12px; font-family: var(--mono); color: var(--faint); padding-top: 3px; }

/* ---------- 强调条 ---------- */
.callout { background: linear-gradient(180deg, #FFFFFF, #FCF8F3); box-shadow: var(--shadow); border-radius: 18px; padding: 20px 24px 20px 30px; position: relative; overflow: hidden; }
.callout::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 6px; background: var(--accent); }
.callout b { display: block; font-size: 17px; }
.callout span { color: var(--muted); font-size: 15px; }

/* ---------- 价目行 ---------- */
.price-group { margin-top: 36px; }
.price-group h3 { font-size: 20px; margin-bottom: 8px; }
.price-row { display: grid; grid-template-columns: 1fr auto auto; gap: 16px; align-items: center; padding: 16px 4px; border-bottom: 1px solid var(--line); text-decoration: none; }
.price-row:hover { background: rgba(20, 20, 20, .03); }
.price-row .nm { font-weight: 600; }
.price-row .nm small { display: block; font-weight: 400; color: var(--muted); font-size: 13px; }
.price-row .pr { font-weight: 800; font-size: 20px; color: var(--ink); }
.pill { display: inline-block; font-size: 12px; border-radius: 999px; padding: 2px 10px; border: 1px solid currentColor; white-space: nowrap; }
.pill.ok { color: var(--ok); }
.pill.alert { color: var(--alert); }
@media (max-width: 600px) { .price-row { grid-template-columns: 1fr auto; } .price-row .pill { grid-column: 2; justify-self: end; } }

/* ---------- 常见问题折叠 ---------- */
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; padding: 20px 44px 20px 0; font-weight: 700; font-size: 17px; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 6px; top: 16px; font-size: 24px; font-weight: 300; }
.faq details[open] summary::after { content: "−"; }
.faq .ans { padding: 0 0 20px; color: var(--muted); max-width: 68em; }
.faq .ans p { margin: 0 0 10px; }

/* ---------- 文章与页面正文 ---------- */
.page-head { padding: 72px 0 40px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 68ch) 240px; gap: 64px; justify-content: space-between; }
.toc { position: sticky; top: 100px; align-self: start; font-size: 14px; }
.toc .eyebrow { display: block; margin-bottom: 10px; }
.toc a { display: block; text-decoration: none; color: var(--muted); padding: 4px 0 4px 12px; border-left: 1px solid var(--line); }
.toc a.h3 { padding-left: 24px; }
.toc a:hover { color: var(--ink); border-left-color: var(--ink); }
@media (max-width: 960px) { .article-layout { grid-template-columns: 1fr; } .toc { display: none; } }
.prose { max-width: 68ch; font-size: 16px; }
.prose h2 { font-size: 26px; margin: 2em 0 .6em; }
.prose h3 { font-size: 20px; margin: 1.6em 0 .5em; }
.prose p, .prose ul, .prose ol { margin: 0 0 1.1em; }
.prose li { margin: .3em 0; }
.prose a { text-underline-offset: 4px; }
.prose code { font-family: var(--mono); font-size: .9em; background: rgba(20, 20, 20, .06); border-radius: 6px; padding: 1px 6px; }
.prose pre { background: var(--ink-card); color: #E6E0D8; border-radius: 16px; padding: 18px 20px; overflow-x: auto; font-size: 14px; line-height: 1.7; }
.prose pre code { background: none; padding: 0; color: inherit; }
.prose blockquote { margin: 1.4em 0; background: linear-gradient(180deg, #FFFFFF, #FCF8F3); box-shadow: var(--shadow); border-radius: 18px; padding: 16px 22px 16px 28px; position: relative; overflow: hidden; }
.prose blockquote::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 6px; background: var(--accent); }
.prose blockquote p:last-child { margin: 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.4em 0; font-size: 15px; }
.prose th { background: rgba(20, 20, 20, .05); text-align: left; }
.prose th, .prose td { border-bottom: 1px solid var(--line); padding: 10px 12px; }
.prose img { border-radius: 16px; }
.meta { color: var(--faint); font-size: 13px; font-family: var(--mono); letter-spacing: .04em; }

/* ---------- 教程列表 ---------- */
.post-list { border-top: 1px solid var(--line); }
.post-item { display: grid; grid-template-columns: 1fr auto; gap: 20px; padding: 24px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.post-item h3 { font-size: 20px; margin-bottom: 6px; }
.post-item p { margin: 0; color: var(--muted); font-size: 15px; }
.post-item:hover h3 { text-decoration: underline; text-underline-offset: 5px; }
.pager { display: flex; justify-content: space-between; margin-top: 32px; }

/* ---------- 下单步骤 ---------- */
.steps { counter-reset: s; display: grid; gap: 12px; padding: 0; margin: 0; }
.steps li { list-style: none; display: grid; grid-template-columns: 44px 1fr; gap: 16px; align-items: start; }
.steps li::before { counter-increment: s; content: counter(s); width: 40px; height: 40px; border-radius: 50%; background: var(--ink); color: var(--paper); display: grid; place-items: center; font-family: var(--mono); font-size: 14px; }
.steps b { display: block; font-size: 17px; padding-top: 6px; }
.steps span { color: var(--muted); font-size: 15px; }
.qr { width: 180px; border-radius: 16px; box-shadow: var(--shadow); }

/* ---------- 页脚 ---------- */
.footer { background: var(--ink-bg); color: var(--on-dark-muted); padding: 56px 0 40px; font-size: 14px; }
.footer .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; }
.footer img { height: 26px; width: auto; }
.footer h4 { color: var(--on-dark); font-size: 14px; margin: 0 0 12px; }
.footer a { display: block; text-decoration: none; padding: 3px 0; }
.footer a:hover { color: var(--on-dark); }
.footer .copy { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line-dark); font-size: 13px; }
@media (max-width: 760px) { .footer .cols { grid-template-columns: 1fr 1fr; } .footer .cols > div:first-child { grid-column: 1 / -1; } }

.center-cta { display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; }
.mt-0 { margin-top: 0; } .mt-24 { margin-top: 24px; } .mt-40 { margin-top: 40px; }