:root {
  --ink: #10261f;
  --ink-soft: #4b5f58;
  --paper: #f6f3ec;
  --paper-deep: #ece7db;
  --card: #fffdf8;
  --line: #dcd6c8;
  --forest: #07322a;
  --forest-2: #0c4136;
  --forest-line: #1d5548;
  --green: #087b62;
  --mint-strong: #19b78a;
  --mint: #a5f1d6;
  --on-dark: #f2fbf7;
  --on-dark-soft: #b6d0c7;
  --amber: #f0b44c;
  --display: 'Bricolage Grotesque', 'PingFang SC', 'Hiragino Sans GB', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --body: Inter, 'PingFang SC', 'Hiragino Sans GB', 'Noto Sans SC', 'Microsoft YaHei', -apple-system, 'Segoe UI', sans-serif;
  --gutter: clamp(16px, 4vw, 48px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 17px/1.6 var(--body); -webkit-font-smoothing: antialiased; }
h1, h2, h3, p, ol, ul, dl, dd { margin: 0; padding: 0; }
ol, ul { list-style: none; }
a { color: inherit; }
img, svg { display: block; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: -999px; top: 8px; z-index: 30; background: var(--mint); color: var(--forest); padding: 8px 14px; border-radius: 8px; }
.skip:focus { left: 16px; }
:focus-visible { outline: 3px solid var(--mint-strong); outline-offset: 2px; }

h1, h2 { font-family: var(--display); font-weight: 700; letter-spacing: -0.025em; line-height: 1.05; text-wrap: balance; }
h2 { font-size: clamp(32px, 4.6vw, 52px); }
h3 { font-family: var(--display); font-weight: 650; font-size: 23px; line-height: 1.2; letter-spacing: -0.01em; }
.eyebrow { font-size: 14px; font-weight: 600; color: var(--green); margin-bottom: 14px; }
.nb { white-space: nowrap; }
.lede { color: var(--ink-soft); font-size: clamp(17px, 1.6vw, 20px); max-width: 60ch; margin-top: 18px; }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 12px; font-weight: 600; font-size: 16px; text-decoration: none; transition: background .15s, color .15s, transform .15s; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--mint); color: var(--forest); }
.btn-primary:hover { background: #c3f7e4; }
.btn-ghost { color: var(--on-dark); box-shadow: inset 0 0 0 1.5px var(--forest-line); }
.btn-ghost:hover { background: var(--forest-2); }
.btn-dark { background: var(--forest); color: var(--mint); white-space: nowrap; }
.btn-dark:hover { background: var(--forest-2); }

/* 顶部导航 */
.nav { position: sticky; top: 0; z-index: 20; background: var(--forest); color: var(--on-dark); border-bottom: 1px solid var(--forest-line); }
.nav-row { display: flex; align-items: center; gap: 28px; min-height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 700 21px/1 var(--display); letter-spacing: -0.02em; color: inherit; }
.nav-links { display: flex; gap: 24px; font-size: 15px; }
.nav-links a { text-decoration: none; color: var(--on-dark-soft); }
.nav-links a:hover { color: var(--on-dark); }
.nav-side { display: flex; align-items: center; gap: 16px; font-size: 15px; margin-left: auto; }
.nav-side a:not(.btn) { color: var(--on-dark-soft); text-decoration: none; white-space: nowrap; }
.nav-side a:not(.btn):hover { color: var(--on-dark); }
.nav-side .btn { min-height: 40px; padding: 0 16px; font-size: 15px; border-radius: 10px; white-space: nowrap; }

/* 首屏 */
.hero { position: relative; overflow: hidden; background: var(--forest); color: var(--on-dark); }
.hero-link { position: absolute; right: -180px; top: -140px; width: 860px; height: 860px; opacity: .55; pointer-events: none; }
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr); gap: clamp(32px, 5vw, 72px); align-items: center; padding-top: clamp(48px, 7vw, 92px); padding-bottom: clamp(56px, 7vw, 100px); }
.hero .eyebrow { color: var(--mint); }
.hero h1 { font-size: clamp(42px, 6.2vw, 76px); }
.hero .lede { color: var(--on-dark-soft); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-note { margin-top: 18px; font-size: 14px; color: var(--on-dark-soft); }

.desk { background: var(--card); color: var(--ink); border-radius: 18px; overflow: hidden; box-shadow: 0 30px 70px -20px rgba(0, 0, 0, .55); font-size: 14px; line-height: 1.4; }
.desk-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--line); font-weight: 600; }
.desk-bar small { font-weight: 500; color: var(--ink-soft); }
.desk-body { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); }
.convo { display: flex; flex-direction: column; gap: 10px; padding: 16px; background: var(--paper); min-height: 330px; }
.bubble { max-width: 88%; padding: 9px 12px; border-radius: 12px; animation: rise .45s ease both; }
.bubble.in { align-self: flex-start; background: var(--card); border-bottom-left-radius: 4px; }
.bubble.out { align-self: flex-end; background: #d9f5ea; border-bottom-right-radius: 4px; animation-delay: .5s; }
.bubble.in.late { animation-delay: 1s; }
.bubble small { display: block; margin-top: 4px; color: var(--ink-soft); font-size: 12px; }
.convo-tag { align-self: center; margin-top: auto; padding: 3px 10px; border-radius: 99px; background: var(--paper-deep); color: var(--ink-soft); font-size: 12px; }
.quote { padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.quote h3 { font-size: 16px; }
.dims { display: flex; flex-wrap: wrap; gap: 5px; }
.dims li { padding: 2px 8px; border-radius: 6px; background: var(--paper-deep); font-size: 12px; font-weight: 500; }
.sum { display: grid; gap: 6px; }
.sum div { display: flex; justify-content: space-between; gap: 12px; }
.sum dt { color: var(--ink-soft); }
.sum dd { font-weight: 600; font-variant-numeric: tabular-nums; }
.sum .pay { padding-top: 8px; border-top: 1px dashed var(--line); font-size: 16px; }
.flag { margin-top: auto; padding: 8px 10px; border-radius: 8px; background: #e0f4ec; color: #075c49; font-size: 12.5px; font-weight: 500; }

/* 一笔交易的流程 */
section { padding: clamp(64px, 9vw, 120px) 0; }
.deal-grid { display: grid; grid-template-columns: minmax(0, 380px) minmax(0, 1fr); gap: clamp(32px, 6vw, 88px); margin-top: 56px; align-items: start; }
.ticket { position: sticky; top: 100px; background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 22px; font-size: 15px; }
.ticket-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 16px; font-weight: 600; }
.pill { padding: 3px 11px; border-radius: 99px; background: var(--forest); color: var(--mint); font-size: 13px; font-weight: 600; white-space: nowrap; }
.meter { display: grid; grid-template-columns: repeat(5, 1fr); gap: 5px; margin-bottom: 18px; }
.meter i { height: 5px; border-radius: 3px; background: var(--paper-deep); transition: background .3s; }
.meter i.on { background: var(--mint-strong); }
.ticket .sum { gap: 9px; }
.ticket-note { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 14px; }
.stages { position: relative; }
.stages::before { content: ''; position: absolute; left: 19px; top: 8px; bottom: 8px; width: 2px; background: var(--line); }
.stage { position: relative; padding: 0 0 clamp(44px, 7vw, 92px) 64px; }
.stage:last-child { padding-bottom: 0; }
.num { position: absolute; left: 0; top: 0; display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; background: var(--paper); border: 2px solid var(--line); font: 700 16px/1 var(--display); color: var(--ink-soft); transition: background .25s, color .25s, border-color .25s; }
.stage.active .num { background: var(--forest); border-color: var(--forest); color: var(--mint); }
.stage p { color: var(--ink-soft); margin-top: 10px; max-width: 58ch; }
.stage ul { margin-top: 14px; display: grid; gap: 7px; font-size: 16px; max-width: 58ch; }
.stage li { position: relative; padding-left: 20px; }
.stage li::before { content: ''; position: absolute; left: 0; top: .72em; width: 9px; height: 2px; background: var(--mint-strong); }

/* 自动翻译 */
.translation { background: var(--paper-deep); }
.twin { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 44px; }
.pane { display: flex; flex-direction: column; gap: 10px; padding: 20px; border-radius: 16px; background: var(--card); border: 1px solid var(--line); font-size: 16px; line-height: 1.45; }
.pane-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding-bottom: 10px; border-bottom: 1px solid var(--line); font-size: 15px; }
.pane-head span { padding: 2px 10px; border-radius: 99px; background: var(--forest); color: var(--mint); font-size: 13px; font-weight: 600; }
.msg { max-width: 90%; padding: 10px 13px; border-radius: 12px; }
.msg.in { align-self: flex-start; background: var(--paper); border-bottom-left-radius: 4px; }
.msg.out { align-self: flex-end; background: #d9f5ea; border-bottom-right-radius: 4px; }
.msg small { display: block; margin-top: 5px; color: var(--ink-soft); font-size: 13px; }
.twin-note { margin-top: 12px; color: var(--ink-soft); font-size: 14px; }
.perks { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px 36px; margin-top: 44px; }
.perks strong { display: block; font: 650 19px/1.3 var(--display); margin-bottom: 6px; }
.perks span { color: var(--ink-soft); font-size: 16px; }

/* 团队 */
.team { background: var(--forest); color: var(--on-dark); }
.team .eyebrow { color: var(--mint); }
.team .lede { color: var(--on-dark-soft); }
.team-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 80px); align-items: center; }
.handover { background: var(--forest-2); border: 1px solid var(--forest-line); border-radius: 16px; padding: 22px; font-size: 15px; }
.handover-head { font-weight: 600; margin-bottom: 16px; }
.people { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.person { flex: 1; min-width: 0; padding: 10px 12px; border-radius: 10px; background: var(--forest); }
.person small { display: block; color: var(--on-dark-soft); font-size: 12px; }
.arrow { flex: none; color: var(--mint); font-weight: 700; }
.handover li { display: flex; gap: 10px; padding: 8px 0; border-top: 1px solid var(--forest-line); color: var(--on-dark-soft); }
.handover li::before { content: '✓'; color: var(--mint); font-weight: 700; }
.team-points { margin-top: 56px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; border-top: 1px solid var(--forest-line); padding-top: 28px; }
.team-points p { color: var(--on-dark-soft); font-size: 15px; margin-top: 8px; }
.team-points h3 { font-size: 19px; }

/* AI */
.ai-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(32px, 6vw, 80px); align-items: center; }
.ai ul { margin-top: 22px; display: grid; gap: 14px; }
.ai li strong { display: block; font-weight: 600; }
.ai li span { color: var(--ink-soft); font-size: 16px; }
.lock { background: var(--card); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; }
.lock-step { padding: 18px 22px; }
.lock-step + .lock-step { border-top: 1px dashed var(--line); }
.lock-step small { display: block; color: var(--ink-soft); font-size: 13px; margin-bottom: 6px; }
.lock-step.engine { background: var(--paper); }
.lock-text { font-size: 18px; line-height: 1.5; }
.tok { padding: 1px 6px; border-radius: 5px; background: #d9f5ea; color: #075c49; font-weight: 600; font-variant-numeric: tabular-nums; white-space: nowrap; }
.engine .tok { background: var(--forest); color: var(--mint); font: 500 14px/1.4 ui-monospace, 'SF Mono', Menlo, monospace; }

/* 风控与合规 */
.ledger { margin-top: 44px; border-top: 2px solid var(--ink); }
.ledger div { display: grid; grid-template-columns: minmax(0, 300px) minmax(0, 1fr); gap: 8px 32px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.ledger dt { font-weight: 600; font-family: var(--display); font-size: 19px; }
.ledger dd { color: var(--ink-soft); }

/* 套餐 */
.plans-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: clamp(32px, 6vw, 80px); align-items: start; }
.tier { display: grid; grid-template-columns: 130px minmax(0, 1fr); gap: 4px 20px; padding: 20px 0; border-top: 1px solid var(--line); }
.tier:last-child { border-bottom: 1px solid var(--line); }
.tier strong { font: 650 21px/1.3 var(--display); }
.tier span { color: var(--ink-soft); }

/* 适用行业 */
.industries { background: var(--paper-deep); }
.fit { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 4px 20px; padding: 18px 0; border-top: 1px solid var(--line); }
.fit:last-child { border-bottom: 1px solid var(--line); }
.fit strong { font: 650 19px/1.3 var(--display); }
.fit span { color: var(--ink-soft); }

/* 桌面客户端下载 */
.download { background: var(--paper-deep); }
.download-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: clamp(32px, 6vw, 80px); align-items: start; }
.get { display: flex; align-items: center; justify-content: space-between; gap: 12px 24px; padding: 18px 0; border-top: 1px solid var(--line); }
.get strong { display: block; font: 650 21px/1.3 var(--display); }
.get span { color: var(--ink-soft); font-size: 15px; }
.install summary { font-size: 16px; }
.install p { padding-bottom: 10px; font-size: 15px; }
.install a { color: var(--green); }

/* 常见问题 */
.faq-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.8fr); gap: clamp(32px, 6vw, 80px); }
details { border-top: 1px solid var(--line); }
details:last-child { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; padding: 18px 32px 18px 0; font-weight: 600; list-style: none; position: relative; }
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; position: absolute; right: 4px; top: 14px; font-size: 24px; color: var(--green); }
details[open] summary::after { content: '–'; }
details p { padding-bottom: 20px; color: var(--ink-soft); max-width: 66ch; }

/* 收尾与页脚 */
.closing { background: var(--forest); color: var(--on-dark); padding: clamp(56px, 8vw, 96px) 0; }
.closing-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px; }
.closing h2 { max-width: 16em; }
.closing p { color: var(--on-dark-soft); margin-top: 12px; max-width: 54ch; }
footer { background: var(--forest); color: var(--on-dark-soft); border-top: 1px solid var(--forest-line); padding: 28px 0 36px; font-size: 14px; }
.foot-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 28px; }
.foot-row .brand { color: var(--on-dark); font-size: 18px; }
.legal { margin-top: 16px; max-width: 86ch; font-size: 13px; }

@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

@media (max-width: 1120px) {
  .nav-links { display: none; }
  .nav-side { margin-left: auto; }
}

@media (max-width: 1020px) {
  .hero-grid, .team-grid, .ai-grid, .plans-grid, .download-grid, .faq-grid { grid-template-columns: minmax(0, 1fr); }
  .deal-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; margin-top: 36px; }
  .ticket { top: 69px; z-index: 5; padding: 12px 14px; border-radius: 12px; box-shadow: 0 10px 24px -14px rgba(16, 38, 31, .4); }
  .ticket-head { margin-bottom: 8px; }
  .meter { margin-bottom: 0; }
  .ticket .sum, .ticket-note { display: none; }
  .team-points { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .perks { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .nav-row { gap: 12px; min-height: 60px; }
  .nav-side { gap: 12px; font-size: 14px; }
  .nav-signin { display: none; }
  .ticket { top: 61px; }
  .hero-link { right: -320px; top: 40px; width: 640px; height: 640px; }
  .desk-body { grid-template-columns: minmax(0, 1fr); }
  .convo { min-height: 0; }
  .stages::before { left: 15px; }
  .stage { padding-left: 46px; }
  .num { width: 32px; height: 32px; font-size: 14px; }
  .team-points { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .twin, .perks { grid-template-columns: minmax(0, 1fr); }
  .ledger div, .tier, .fit { grid-template-columns: minmax(0, 1fr); }
  .get { flex-direction: column; align-items: stretch; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .bubble { animation: none; }
  .btn, .meter i, .num { transition: none; }
}