:root {
  --bg: #f7f5f0;
  --paper: #ffffff;
  --ink: #1b1d22;
  --muted: #5d6068;
  --line: #e2ded5;
  --blue: #1f4a9a;
  --blue-soft: #e8edf7;
  --fill: #1f4a9a;
  --red: #b3261e;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --w: 1120px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --paper: #1c1f25;
    --ink: #ece9e2;
    --muted: #a3a6ae;
    --line: #2e323a;
    --blue: #7ea3ea;
    --blue-soft: #1f2836;
    --fill: #2a56a8;
    --red: #e0675e;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.8 var(--sans); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); }
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 700; line-height: 1.3; margin: 0; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--paper); padding: 8px 12px; z-index: 20; }
.skip:focus { left: 8px; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

/* nav */
.nav { position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 10px max(16px, calc((100% - var(--w)) / 2)); background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; font: 700 18px var(--serif); color: var(--ink); text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 50%; }
.nav nav { display: flex; align-items: center; gap: 22px; }
.nav nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
.nav nav a:hover { color: var(--ink); }
.nav nav .nav-cta { color: #fff; background: var(--fill); padding: 6px 16px; border-radius: 999px; }
.menu { display: none; background: none; border: 1px solid var(--line); color: var(--ink); padding: 4px 12px; border-radius: 6px; font: inherit; font-size: 14px; }

/* layout */
main > section, .journey { max-width: var(--w); margin-left: auto; margin-right: auto; padding-left: 16px; padding-right: 16px; }
.block { padding-top: 104px; }
.block-head { margin-bottom: 36px; max-width: 760px; }
.num { font: 600 13px var(--sans); color: var(--red); letter-spacing: .12em; margin: 0 0 10px; }
.block-head h2 { font-size: clamp(28px, 4vw, 40px); }
.sub { color: var(--muted); margin: 10px 0 0; }
.mini { font: 600 14px var(--sans); color: var(--muted); letter-spacing: .08em; margin: 0 0 12px; }

/* hero */
.hero { display: grid; grid-template-columns: 1.15fr .85fr; gap: 64px; align-items: center; padding-top: 64px; }
.kicker { color: var(--red); font-weight: 600; letter-spacing: .08em; margin: 0 0 18px; font-size: 14px; }
.hero h1 { font-size: clamp(36px, 5.4vw, 58px); letter-spacing: .01em; }
.lead { font-size: 18px; color: var(--muted); margin: 24px 0 32px; max-width: 32em; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-block; padding: 11px 22px; border: 1px solid var(--ink); border-radius: 999px; color: var(--ink); text-decoration: none; font-weight: 600; font-size: 15px; transition: transform .15s; }
.btn:hover { transform: translateY(-1px); }
.btn.primary { background: var(--fill); border-color: var(--fill); color: #fff; }
.stats { display: flex; gap: 40px; margin: 44px 0 0; padding-top: 24px; border-top: 1px solid var(--line); }
.stats dt { font: 700 30px var(--serif); color: var(--blue); }
.stats dd { margin: 0; color: var(--muted); font-size: 14px; }
.portrait { margin: 0; position: relative; max-width: 420px; justify-self: end; width: 100%; }
.portrait > img { border-radius: 6px; aspect-ratio: 4 / 5; object-fit: cover; width: 100%; background: #c9ccd3; }
.portrait figcaption { position: absolute; left: -24px; bottom: 28px; display: flex; align-items: center; gap: 10px; background: var(--paper); border: 1px solid var(--line); border-radius: 999px; padding: 6px 18px 6px 6px; box-shadow: 0 8px 24px rgb(0 0 0 / .12); }
.portrait figcaption img { width: 44px; height: 44px; border-radius: 50%; }
.portrait figcaption span { font-size: 13px; color: var(--muted); line-height: 1.4; }
.portrait figcaption b { display: block; font: 700 16px var(--serif); color: var(--ink); }

/* journey */
.journey { list-style: none; margin-top: 64px; margin-bottom: 0; display: grid; grid-template-columns: repeat(6, 1fr); gap: 0; }
.journey li { border-top: 2px solid var(--line); }
.journey li:first-child { border-top-color: var(--red); }
.journey a { display: block; padding: 14px 8px 0 0; color: var(--ink); text-decoration: none; font-size: 15px; }
.journey a:hover { color: var(--blue); }
.journey span { display: block; font-size: 12px; color: var(--red); letter-spacing: .1em; }

/* cards */
.cards { display: grid; gap: 20px; }
.cards.three { grid-template-columns: repeat(3, 1fr); }
.cards.four { grid-template-columns: repeat(4, 1fr); }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 6px; padding: 26px; display: flex; flex-direction: column; }
.tag { margin: 0 0 12px; font-size: 13px; font-weight: 600; color: var(--blue); }
.card h3 { font-size: 20px; margin-bottom: 12px; }
.card p { margin: 0; color: var(--muted); }
.fit { margin: auto 0 0; padding-top: 14px; border-top: 1px dashed var(--line); display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; font-size: 14px; }
.fit dt { color: var(--red); font-weight: 600; }
.fit dd { margin: 0; }
.sayings { list-style: none; padding: 0; margin: 40px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.sayings li { font-family: var(--serif); font-size: 18px; padding: 4px 0 4px 16px; border-left: 2px solid var(--red); }

/* proof */
.roles-wrap { margin-bottom: 32px; }
.roles { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.roles li { padding: 6px 14px; background: var(--paper); border: 1px solid var(--line); border-radius: 4px; font-size: 14px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.filters button { font: inherit; font-size: 14px; padding: 5px 14px; border-radius: 999px; border: 1px solid var(--line); background: none; color: var(--muted); cursor: pointer; }
.filters button.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.wall { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.wall figure { margin: 0; }
.wall figure.big { grid-column: span 2; grid-row: span 2; }
.wall img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 4px; background: var(--line); }
.wall figure.big img { aspect-ratio: auto; height: calc(100% - 40px); }
.wall figcaption { font-size: 13px; color: var(--muted); margin-top: 8px; line-height: 1.5; }
.wall figcaption em { font-style: normal; color: var(--red); margin-right: 6px; }
.wall figure[hidden] { display: none; }

/* check */
.check { margin-top: 56px; padding: 32px; background: var(--paper); border: 1px solid var(--line); border-radius: 6px; }
.check h3 { font-size: 24px; }
.quiz { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 16px; margin-top: 20px; }
.quiz label { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border: 1px solid var(--line); border-radius: 6px; cursor: pointer; transition: border-color .15s, background .15s; }
.quiz label:has(input:checked) { border-color: var(--blue); background: var(--blue-soft); }
.quiz input { width: 18px; height: 18px; margin-top: 5px; accent-color: var(--blue); flex: none; }
.quiz-result { margin-top: 16px; padding: 18px 22px; border-left: 3px solid var(--red); background: var(--bg); display: grid; grid-template-columns: auto 1fr; gap: 20px; align-items: center; }
.score { margin: 0; font: 700 20px var(--serif); color: var(--muted); }
.score span { font-size: 40px; color: var(--red); }
.verdict { margin: 0; }
.verdict a { font-weight: 600; }

/* path */
.flow { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(5, 1fr); counter-reset: f; }
.flow li { counter-increment: f; position: relative; padding: 20px 20px 20px 0; border-top: 2px solid var(--blue); }
.flow li::before { content: counter(f); position: absolute; top: -14px; left: 0; width: 26px; height: 26px; border-radius: 50%; background: var(--fill); color: #fff; font-size: 13px; display: grid; place-items: center; }
.flow b { display: block; font: 700 19px var(--serif); margin: 10px 0 6px; }
.flow span { color: var(--muted); font-size: 14px; }
.ladder-title { margin-top: 48px; }
.ladder { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); counter-reset: l; }
.ladder li { counter-increment: l; background: var(--paper); padding: 24px 26px; }
.ladder h4 { font-size: 21px; display: flex; gap: 10px; align-items: baseline; }
.ladder h4::before { content: "0" counter(l); font: 600 13px var(--sans); color: var(--red); }
.ladder .dur { font-size: 13px; color: var(--blue); margin: 4px 0 0; }
.ladder p { margin: 8px 0 0; color: var(--muted); }
.promises { list-style: none; padding: 0; margin: 32px 0 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.promises li { color: var(--muted); font-size: 15px; }
.promises b { display: block; color: var(--ink); font: 700 18px var(--serif); margin-bottom: 4px; }
.quote { margin: 48px 0 0; font: 700 clamp(22px, 3vw, 30px)/1.5 var(--serif); }
.quote cite { display: block; font: 400 14px var(--sans); color: var(--muted); margin-top: 8px; font-style: normal; }

/* faq */
.faq { max-width: 820px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 18px 32px 18px 0; font: 700 18px var(--serif); list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 14px; font: 400 24px var(--sans); color: var(--muted); }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0 0 20px; color: var(--muted); }

/* contact */
.contact { padding-bottom: 96px; }
.contact-box { background: var(--fill); color: #fff; border-radius: 8px; padding: clamp(28px, 5vw, 52px); display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; }
.contact-box .num { color: #ffd6d2; }
.contact-box h2 { font-size: clamp(26px, 3.6vw, 36px); margin: 4px 0 16px; }
.contact-box p { opacity: .92; margin: 0 0 12px; }
.contact-box .small { font-size: 14px; opacity: .8; }
.contact-box a { color: #fff; }
.qrs { display: flex; gap: 16px; }
.qr { margin: 0; background: #fff; color: #1b1d22; border-radius: 6px; padding: 12px; width: 180px; text-align: center; }
.qr img { width: 156px; height: 156px; object-fit: contain; margin: 0 auto; }
.qr figcaption { font-size: 12px; color: #5d6068; margin-top: 6px; line-height: 1.5; }
.qr figcaption b { display: block; font-size: 14px; color: #1b1d22; }

.foot { border-top: 1px solid var(--line); text-align: center; padding: 24px 16px; color: var(--muted); font-size: 13px; }
.foot p { margin: 4px 0; }
.foot a { color: var(--muted); }
.beian { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px 20px; }
.beian a { display: inline-flex; align-items: center; gap: 4px; text-decoration: none; }
.beian a:hover { text-decoration: underline; }

/* responsive */
@media (max-width: 960px) {
  .cards.four { grid-template-columns: repeat(2, 1fr); }
  .wall { grid-template-columns: repeat(3, 1fr); }
  .contact-box { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 40px; padding-top: 32px; }
  .portrait { justify-self: center; max-width: 340px; }
  .portrait figcaption { left: 12px; }
  .journey { grid-template-columns: repeat(5, minmax(88px, 1fr)); overflow-x: auto; }
  .cards.three, .ladder, .sayings, .promises { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; margin-left: 14px; }
  .flow li { border-top: 0; border-left: 2px solid var(--blue); padding: 0 0 24px 28px; }
  .flow li::before { left: -14px; top: 0; }
  .flow b { margin-top: 0; }
  .quiz { grid-template-columns: 1fr; }
  .block { padding-top: 72px; }
}
@media (max-width: 760px) {
  .menu { display: block; }
  .nav nav { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0; background: var(--bg); border-bottom: 1px solid var(--line); padding: 8px 16px 16px; }
  .nav.open nav { display: flex; }
  .nav nav a { padding: 10px 0; }
  .nav nav .nav-cta { text-align: center; margin-top: 8px; }
  .stats { gap: 24px; }
  .stats dt { font-size: 24px; }
  .cards.four { grid-template-columns: 1fr; }
  .wall { grid-template-columns: repeat(2, 1fr); }
  .wall figure.big { grid-row: auto; }
  .wall figure.big img { aspect-ratio: 4 / 3; height: auto; }
  .check { padding: 20px; }
  .quiz-result { grid-template-columns: 1fr; gap: 6px; }
  .qrs { justify-content: center; }
  .qr { width: 50%; max-width: 180px; }
  .qr img { width: 100%; height: auto; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } .btn { transition: none; } }

/* credentials */
.creds { display: grid; grid-template-columns: 1.4fr 1fr; gap: 24px; margin-top: 32px; }

/* timeline */
.timeline { list-style: none; padding: 0; margin: 0 0 48px; position: relative; max-width: 860px; }
.timeline::before { content: ""; position: absolute; left: 76px; top: 8px; bottom: 8px; width: 2px; background: var(--line); }
.timeline li { display: grid; grid-template-columns: 64px 1fr; gap: 28px; padding: 8px 0; position: relative; }
.timeline li::before { content: ""; position: absolute; left: 72px; top: 17px; width: 10px; height: 10px; border-radius: 50%; background: var(--paper); border: 2px solid var(--red); }
.timeline time { font: 600 14px var(--sans); color: var(--red); padding-top: 2px; }
.timeline p { margin: 0; }

/* press */
.press-title { margin-top: 48px; }
.press { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.press a { display: flex; flex-direction: column; gap: 6px; height: 100%; padding: 20px 22px; background: var(--paper); border: 1px solid var(--line); border-radius: 6px; color: var(--ink); text-decoration: none; transition: border-color .15s; }
.press a:hover { border-color: var(--blue); }
.press .src { font-size: 12px; color: var(--red); font-weight: 600; letter-spacing: .04em; }
.press b { font: 700 17px/1.45 var(--serif); }
.press q, .press .note { font-size: 14px; color: var(--muted); }
.press q { quotes: "“" "”"; }

/* views */
.views { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: start; }
.thesis { margin: 0; font: 700 clamp(22px, 2.8vw, 30px)/1.55 var(--serif); padding-left: 20px; border-left: 3px solid var(--red); }
.judgments { list-style: none; counter-reset: j; padding: 0; margin: 0; }
.judgments li { counter-increment: j; padding: 0 0 18px 40px; position: relative; color: var(--muted); }
.judgments li::before { content: "0" counter(j); position: absolute; left: 0; top: 2px; font: 600 13px var(--sans); color: var(--red); }
.judgments b { display: block; color: var(--ink); font: 700 18px var(--serif); margin-bottom: 2px; }
.layers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); margin-top: 40px; }
.layers div { background: var(--paper); padding: 22px 24px; }
.layers span { font-size: 13px; color: var(--blue); font-weight: 600; }
.layers b { display: block; font: 700 22px var(--serif); margin: 2px 0 6px; }
.layers p { margin: 0; color: var(--muted); font-size: 15px; }
.answer { margin: 28px 0 0; font: 700 clamp(19px, 2.4vw, 24px)/1.6 var(--serif); }
.talks-title { margin-top: 48px; }
.talks { list-style: none; padding: 0; margin: 0; columns: 2; column-gap: 40px; }
.talks li { break-inside: avoid; padding: 12px 0; border-bottom: 1px solid var(--line); font-family: var(--serif); font-size: 17px; }
.talks span { display: block; font: 13px var(--sans); color: var(--muted); margin-top: 2px; }

@media (max-width: 960px) {
  .press { grid-template-columns: repeat(2, 1fr); }
  .nav nav { gap: 16px; }
  .nav nav a { font-size: 14px; }
}
@media (max-width: 900px) {
  .creds, .views, .layers { grid-template-columns: 1fr; }
  .views { gap: 28px; }
  .talks { columns: 1; }
  .journey { grid-template-columns: repeat(6, minmax(88px, 1fr)); }
}
@media (max-width: 760px) {
  .press { grid-template-columns: 1fr; }
  .timeline::before { left: 70px; }
  .timeline li { grid-template-columns: 58px 1fr; gap: 26px; }
  .timeline li::before { left: 66px; }
  .timeline time { font-size: 13px; }
}