/* ============================================================
   VibeNote 官网 · 站点样式
   ============================================================ */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--page);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; }
::selection { background: color-mix(in srgb, var(--brand) 25%, transparent); }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.wrap-wide { max-width: 1360px; margin: 0 auto; padding: 0 28px; }

/* ---------- 顶栏 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(18px) saturate(1.6);
  -webkit-backdrop-filter: blur(18px) saturate(1.6);
  background: color-mix(in srgb, var(--page) 78%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 60%, transparent);
}
.nav-in { max-width: 1360px; margin: 0 auto; padding: 0 28px; height: 56px; display: flex; align-items: center; gap: 22px; }
.logo { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 15.5px; letter-spacing: .2px; text-decoration: none; }
.logo img { width: 22px; height: 22px; border-radius: 6px; }
.nav-links { display: flex; gap: 4px; margin-left: 8px; }
.nav-links a {
  text-decoration: none; font-size: 13px; color: var(--mut);
  padding: 6px 11px; border-radius: 8px;
}
.nav-links a:hover { color: var(--ink); background: var(--card-2); }
.nav-end { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.ctl {
  display: inline-flex; align-items: center; justify-content: center;
  height: 32px; min-width: 32px; padding: 0 9px;
  border: 1px solid var(--line); border-radius: 9px;
  background: var(--card); color: var(--mut);
  font-family: inherit; font-size: 12.5px; font-weight: 500;
  cursor: pointer; gap: 5px;
}
.ctl[hidden] { display: none; }
.ctl:hover { color: var(--ink); border-color: var(--vn-bg-3); }
.ctl svg { width: 15px; height: 15px; }
.language-picker { position: relative; display: inline-flex; align-items: center; color: var(--mut); }
.language-picker select {
  appearance: none; -webkit-appearance: none;
  field-sizing: content;
  height: 34px; padding: 0 23px 0 26px;
  border: 0; border-radius: 7px; background: transparent; color: inherit;
  font: inherit; font-size: 13px; cursor: pointer;
}
.language-picker select:hover { color: var(--ink); background: var(--card-2); }
.language-picker select:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.language-picker option { background: var(--card); color: var(--ink); }
.language-picker svg { position: absolute; pointer-events: none; }
.language-globe { left: 6px; width: 14px; height: 14px; }
.language-chevron { right: 5px; width: 12px; height: 12px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  height: 40px; padding: 0 22px;
  border-radius: 11px; border: 0;
  background: var(--brand); color: #fff;
  font-size: 14.5px; font-weight: 600; font-family: inherit;
  text-decoration: none; cursor: pointer;
}
.btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn.lg { height: 46px; padding: 0 26px; font-size: 15.5px; border-radius: 10px; }
.btn.ghost { background: var(--card); color: var(--ink); border: 1px solid var(--line); }
.btn.ghost:hover { border-color: var(--vn-bg-3); filter: none; }

/* ---------- Hero ---------- */
.hero { padding: 76px 0 30px; text-align: center; position: relative; z-index: 0; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(90deg, color-mix(in srgb, var(--ink) 4%, transparent) 1px, transparent 1px),
    linear-gradient(color-mix(in srgb, var(--ink) 4%, transparent) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(80% 62% at 50% 34%, #000 35%, transparent 100%);
  mask-image: radial-gradient(80% 62% at 50% 34%, #000 35%, transparent 100%);
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--mono); font-size: 11px; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--mut);
}
.eyebrow .d { width: 6px; height: 6px; border-radius: 50%; background: var(--vn-green); }
.hero h1 {
  margin: 26px auto 0; max-width: 22ch;
  font-size: clamp(38px, 5.4vw, 62px);
  line-height: 1.06; font-weight: 700; letter-spacing: -.025em;
  overflow-wrap: break-word; hyphens: auto;
  text-wrap: balance;
}
html:lang(ja) .hero h1 span { display: inline-block; }
.hero .sub {
  margin: 20px auto 0; max-width: 640px;
  font-size: clamp(16px, 1.8vw, 19px); line-height: 1.6; color: var(--mut);
  text-wrap: balance;
}
.hero-cta { margin-top: 34px; display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }
.download-icon { display: none; width: 22px; height: 22px; flex-shrink: 0; }
.hero-cta.has-current { display: grid; grid-template-columns: repeat(2, max-content); gap: 10px 22px; }
.hero-cta .is-current { grid-column: 1 / -1; justify-self: center; height: 54px; padding: 0 30px; font-size: 17px; gap: 10px; }
.hero-cta .is-current .download-icon { display: block; }
.hero-cta.has-current .btn:not(.is-current) {
  height: auto; padding: 6px 0; border: 0; border-radius: 0;
  background: transparent; color: var(--mut); font-size: 13px; font-weight: 500;
  text-decoration: underline; text-underline-offset: 4px;
}
.hero-cta.has-current .btn:not(.is-current):hover { color: var(--ink); transform: none; }
.hero-cta.has-current .btn:not(.is-current) .download-icon { display: block; width: 16px; height: 16px; }
.hero-benefits { max-width: 1060px; margin: 60px auto 0; padding: 30px 0; border: 1px solid var(--line); border-radius: 16px; background: color-mix(in srgb, var(--card) 70%, var(--page)); list-style: none; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.hero-benefit { display: flex; align-items: flex-start; gap: 16px; padding: 0 28px; text-align: left; }
.hero-benefit + .hero-benefit { border-left: 1px solid var(--line); }
.hero-benefit > svg { width: 26px; height: 26px; flex-shrink: 0; margin-top: 3px; color: var(--brand); }
.hero-benefit > div { min-width: 0; }
.hero-benefit strong { display: block; font-size: 20px; font-weight: 650; line-height: 1.5; letter-spacing: -.3px; }
.hero-benefit span { display: block; margin-top: 10px; font-size: 14px; line-height: 1.75; color: var(--ink-2); text-wrap: pretty; }
.agents-row { margin-top: 26px; font-size: 13px; color: var(--dim); }
.agents-row .agent-names { display: block; margin-top: 6px; line-height: 1.7; }
.hero-shot { margin-top: 54px; max-width: 1060px; margin-left: auto; margin-right: auto; }
.hero-carousel { position: relative; aspect-ratio: 1728 / 1084; }
.hero-carousel .mock-frame { position: absolute; inset: 0; opacity: 0; transition: opacity .5s ease; }
.hero-carousel .mock-frame.is-on { opacity: 1; }
.hero-dots { display: flex; gap: 8px; justify-content: center; margin-top: 14px; }
.hero-dots button { width: 8px; height: 8px; border-radius: 999px; border: 0; padding: 0; background: color-mix(in srgb, var(--vn-fg) 16%, transparent); cursor: pointer; transition: width .3s ease, background .3s ease; }
.hero-dots button.is-on { width: 22px; background: var(--brand); }
@media (prefers-reduced-motion: reduce) { .hero-carousel .mock-frame { transition: none; } }
.hero-shot .cap { margin-top: 16px; font-size: 12.5px; color: var(--dim); text-align: center; }

/* ---------- 分节 ---------- */
.section { padding: 96px 0 0; }
#pains { padding-top: 64px; }
.sec-head { max-width: 720px; }
.sec-head.center { margin: 0 auto; text-align: center; }
.kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono);
  font-size: 11px; font-weight: 500; letter-spacing: .14em;
  color: var(--brand); text-transform: uppercase;
}
.kicker .no {
  width: 22px; height: 22px; border-radius: 7px;
  background: color-mix(in srgb, var(--brand) 13%, transparent);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 10px; letter-spacing: 0;
}
.section h2 {
  margin-top: 16px;
  font-size: clamp(27px, 3.4vw, 38px);
  line-height: 1.22; font-weight: 720; letter-spacing: -.02em;
  text-wrap: balance;
}
.section .lead { margin-top: 14px; font-size: 16.5px; line-height: 1.65; color: var(--mut); }

/* 01 问题卡 */
.pains { margin-top: 44px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.pain {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; padding: 26px 28px 28px;
}
.pain .no {
  width: 30px; height: 30px; border-radius: 9px;
  background: color-mix(in srgb, var(--pn, var(--brand)) 13%, transparent);
  color: var(--pn, var(--brand));
  display: flex; align-items: center; justify-content: center;
  font-size: 13.5px; font-weight: 700;
}
.pain h3 { margin-top: 16px; font-size: 18.5px; font-weight: 700; letter-spacing: -.2px; }
.pain p { margin-top: 10px; font-size: 14.5px; line-height: 1.7; color: var(--mut); }
.pain.c1 { --pn: var(--vn-red); }
.pain.c2 { --pn: var(--vn-orange); }
.pain.c3 { --pn: var(--vn-purple); }
.pain.c4 { --pn: var(--vn-aqua); }

/* 02 四步 + 追溯链 */
.steps { margin-top: 46px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; counter-reset: step; }
.step {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; padding: 22px 22px 24px; position: relative;
}
.step .sno {
  display: inline-flex; align-items: center; justify-content: center;
  height: 24px; padding: 0 10px; border-radius: 999px;
  background: var(--card-2); border: 1px solid var(--line);
  font-size: 12px; font-weight: 650; color: var(--mut);
}
.step h3 { margin-top: 14px; font-size: 17.5px; font-weight: 700; }
.step p { margin-top: 9px; font-size: 13.5px; line-height: 1.7; color: var(--mut); }
.step .entry {
  margin-top: 14px; font-family: var(--mono); font-size: 11.5px; color: var(--dim);
}
.trace {
  margin-top: 22px;
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  padding: 22px 26px 24px;
}
.trace-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 600; color: var(--vn-green);
}
.trace-tag .d { width: 7px; height: 7px; border-radius: 50%; background: var(--vn-green); }
.trace-chain { margin-top: 14px; display: flex; flex-direction: column; align-items: stretch; gap: 10px; }
.tlink {
  display: flex; align-items: center; gap: 10px;
  background: var(--page-2); border: 1px solid var(--line);
  border-radius: 11px; padding: 12px 16px;
}
.tlink .kind {
  flex: none; font-size: 10.5px; font-weight: 700; letter-spacing: .8px;
  padding: 3px 8px; border-radius: 6px;
}
.tlink.k-issue .kind { color: var(--vn-red); background: color-mix(in srgb, var(--vn-red) 13%, transparent); }
.tlink.k-design .kind { color: var(--vn-accent); background: color-mix(in srgb, var(--vn-accent) 13%, transparent); }
.tlink.k-plan .kind { color: var(--vn-orange); background: color-mix(in srgb, var(--vn-orange) 14%, transparent); }
.tlink .body { min-width: 0; }
.tlink .t { font-size: 13.5px; font-weight: 600; line-height: 1.4; }
.tlink .s { margin-top: 3px; font-size: 12px; color: var(--mut); }
.tlink .s code { font-family: var(--mono); font-size: 11px; }
.tarrow { align-self: center; transform: rotate(90deg); color: var(--dim); font-size: 15px; flex: none; }
.trace-note { margin-top: 16px; font-size: 13.5px; color: var(--mut); line-height: 1.65; }

/* 03 能力网格 */
.fgroups { margin-top: 46px; display: flex; flex-direction: column; gap: 36px; }
.fgroup-h { display: flex; align-items: baseline; gap: 12px; }
.fgroup-h b { font-size: 16px; font-weight: 700; }
.fgroup-h span { font-size: 13px; color: var(--mut); }
.feats { margin-top: 14px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.feats.g2 { grid-template-columns: repeat(2, 1fr); }
.feat {
  background: var(--card); border: 1px solid var(--line);
  border-radius: 16px; padding: 22px 24px 24px;
}
.feat .fi {
  width: 34px; height: 34px; border-radius: 10px;
  background: color-mix(in srgb, var(--fc, var(--brand)) 13%, transparent);
  color: var(--fc, var(--brand));
  display: flex; align-items: center; justify-content: center;
}
.feat .fi svg { width: 17px; height: 17px; }
.feat h3 { margin-top: 15px; font-size: 16.5px; font-weight: 700; }
.feat p { margin-top: 8px; font-size: 13.5px; line-height: 1.7; color: var(--mut); }
.feat { display: flex; flex-direction: column; }
.feat .foot { margin-top: auto; padding-top: 14px; border-top: 1px solid var(--line); font-family: var(--mono); font-size: 11px; color: var(--dim); }
.feat.f1 { --fc: var(--vn-accent); }
.feat.f2 { --fc: var(--vn-purple); }
.feat.f3 { --fc: var(--vn-orange); }
.feat.f4 { --fc: var(--vn-red); }
.feat.f5 { --fc: var(--vn-green); }
.feat.f6 { --fc: var(--vn-aqua); }
.feat.f7 { --fc: var(--vn-grey-2); }
.feat.f8 { --fc: var(--vn-accent); }

/* 04 数据 */
.shot-cap { margin-top: 14px; font-size: 12.5px; color: var(--dim); }

/* 04 批注 */
.anno-example { margin-top: 30px; }
.anno-example > figcaption { margin-bottom: 14px; font-size: 12.5px; font-weight: 500; color: var(--mut); }
.anno-compare { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; align-items: stretch; }
.anno-panel { min-width: 0; padding: 20px; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: 14px; background: var(--card); }
.anno-col-head { margin-bottom: 18px; }
.anno-col-head h3 { font-size: 16px; line-height: 1.5; font-weight: 650; }
.anno-col-head > p { margin-top: 5px; font-size: 13px; line-height: 1.6; color: var(--mut); }
.anno-chat { display: flex; flex: 1; flex-direction: column; gap: 12px; }
.anno-bubble { width: 92%; padding: 10px 12px; border-radius: 10px 10px 10px 2px; background: var(--card-2); font-size: 13px; line-height: 1.6; color: var(--ink-2); }
.anno-bubble > b { display: block; margin-bottom: 4px; font-size: 11px; font-weight: 600; color: var(--mut); }
.anno-bubble ol { margin: 6px 0 0 18px; }
.anno-bubble li + li { margin-top: 3px; }
.anno-bubble.is-you { align-self: flex-end; border-radius: 10px 10px 2px 10px; background: color-mix(in srgb, var(--brand) 10%, var(--card)); color: var(--ink-1); }
.anno-cards { display: flex; flex: 1; flex-direction: column; justify-content: space-between; gap: 10px; }
.anno-card { padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--page); }
.anno-card header { display: flex; align-items: center; gap: 8px; }
.anno-number { flex: none; width: 20px; height: 20px; display: inline-flex; align-items: center; justify-content: center; border-radius: 5px; background: color-mix(in srgb, var(--brand) 12%, transparent); font-family: var(--mono); font-size: 10px; color: var(--brand); }
.anno-card h4 { font-size: 13.5px; font-weight: 650; }
.anno-state { margin-left: auto; display: inline-flex; align-items: center; gap: 4px; flex: none; font-size: 11px; color: var(--mut); }
.anno-state svg { width: 12px; height: 12px; }
.anno-state.is-resolved { color: color-mix(in srgb, var(--vn-green) 70%, var(--ink)); }
.anno-card blockquote { margin: 8px 0; padding-left: 8px; border-left: 2px solid color-mix(in srgb, var(--brand) 50%, var(--line)); color: var(--mut); font-size: 12.5px; line-height: 1.5; }
.anno-card > p { display: flex; align-items: baseline; gap: 8px; font-size: 13px; line-height: 1.6; color: var(--ink-1); }
.anno-card > p + p { margin-top: 4px; }
.anno-card > p > b { flex: none; width: 32px; font-size: 11px; font-weight: 600; color: var(--mut); }
.anno-card > p > span { min-width: 0; }

/* 05 同步与协作 */
.local-duo { margin-top: 40px; display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.local-col { min-width: 0; padding-top: 24px; border-top: 1px solid var(--line); display: flex; flex-direction: column; align-items: flex-start; }
.local-label { display: flex; align-items: center; gap: 8px; font-size: 12px; font-weight: 500; color: var(--brand); }
.local-label svg { width: 16px; height: 16px; }
.local-col h3 { margin-top: 14px; font-size: 19px; line-height: 1.4; font-weight: 700; }
.local-col p { margin-top: 10px; font-size: 14.5px; line-height: 1.75; color: var(--mut); }
.local-steps { width: 100%; margin-top: auto; padding-top: 24px; display: flex; flex-wrap: wrap; gap: 10px 20px; list-style: none; font-size: 12px; line-height: 1.6; color: var(--ink-2); }
.local-steps li { display: flex; align-items: baseline; gap: 7px; }
.local-steps li > span:first-child { font-family: var(--mono); font-size: 10px; color: var(--dim); }

/* FAQ */
.faqs { margin-top: 40px; border-top: 1px solid var(--line); }
.faq { border-bottom: 1px solid var(--line); }
.faq summary {
  list-style: none; cursor: pointer;
  display: flex; align-items: center; gap: 14px;
  padding: 19px 4px; font-size: 16px; font-weight: 600;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .pm { margin-left: auto; color: var(--dim); font-size: 18px; font-weight: 400; transition: transform .18s ease; }
.faq[open] summary .pm { transform: rotate(45deg); }
.faq .a { padding: 0 4px 20px; font-size: 14.5px; line-height: 1.75; color: var(--mut); max-width: 760px; }
.faq .a ul { margin: 12px 0; padding-left: 20px; }
.faq .a li + li { margin-top: 10px; }
.faq .a strong { color: var(--ink-1); font-weight: 600; }
.faq .a code { font-family: var(--mono); font-size: 12.5px; background: var(--card-2); border: 1px solid var(--line); border-radius: 5px; padding: 1px 6px; }

/* CTA */
.cta { padding: 110px 0 90px; text-align: center; }
.cta h2 { font-size: clamp(30px, 4vw, 46px); font-weight: 800; letter-spacing: -.5px; }
.cta p { margin: 16px auto 0; max-width: 560px; font-size: 16.5px; line-height: 1.65; color: var(--mut); }
.cta .hero-cta { margin-top: 30px; }
.cta .fn { margin-top: 18px; font-size: 12.5px; color: var(--dim); }

/* 页脚 */
footer.foot { border-top: 1px solid var(--line); padding: 30px 0 40px; }
.foot-in { max-width: 1360px; margin: 0 auto; padding: 0 28px; display: flex; flex-wrap: wrap; align-items: center; gap: 18px; font-size: 12.5px; color: var(--dim); }
.foot-in .sp { flex: 1; }
.foot-in a { color: var(--mut); text-decoration: none; }
.foot-in a:hover { color: var(--ink); }

/* 响应式 */
@media (max-width: 960px) {
  .pains, .local-duo { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .feats { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
}
@media (max-width: 760px) {
  .hero-benefits { grid-template-columns: 1fr; padding: 0; margin-top: 40px; }
  .hero-benefit { padding: 22px 24px; gap: 14px; }
  .hero-benefit + .hero-benefit { border-left: 0; border-top: 1px solid var(--line); }
  .hero-benefit > svg { width: 24px; height: 24px; margin-top: 2px; }
  .hero-benefit strong { font-size: 18px; }
  .hero-benefit span { margin-top: 6px; }
}
@media (max-width: 800px) {
  .anno-compare { grid-template-columns: 1fr; gap: 18px; }
  .anno-panel { padding: 16px; }
}
@media (max-width: 600px) {
  .nav-in { padding: 0 16px; gap: 12px; }
  .language-picker select { max-width: 125px; text-overflow: ellipsis; }
  html:lang(zh) .hero h1 span { display: block; }
  html:lang(ja) .hero h1 { font-size: clamp(30px, 9vw, 38px); }
  .steps, .feats, .feats.g2 { grid-template-columns: 1fr; }
  .hero { padding-top: 56px; }
}