/* ==========================================================================
   九州拉美（北京）国际商务公司 — 视觉体系
   Anchor: Pentagram (Information Architecture school)
   Type-as-image · strict grid · flat color blocks · zero radius · zero shadow
   ========================================================================== */

/* ---------- 1. Tokens ---------- */
:root {
  /* Ground & ink — the entire palette is 3 hues + 1 accent */
  --ink:          #101114;   /* near-black, the primary voice */
  --ink-soft:     #3A3D45;   /* body copy */
  --ink-mute:     #6E727C;   /* captions, metadata */
  --ground:       #FBFAF7;   /* bone white page */
  --surface:      #F2F0EA;   /* cream section ground */
  --rule:         #DCD8CE;   /* 1px hairlines */
  --rule-strong:  #101114;

  /* Accent — 中国红, used as flat block only */
  --accent:       #C8102E;
  --accent-ink:   #FFFFFF;
  --accent-tint:  #F7EAEC;

  /* Market identity blocks (flat fields, not gradients) */
  --mx:           #1F5B4E;   /* Mexico — deep green */
  --ar:           #6E9BC4;   /* Argentina — celeste */

  /* Type */
  --font-display: "Poppins", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body:    "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono:    "IBM Plex Mono", "Consolas", monospace;

  /* Spacing ladder — 8pt base */
  --s1: 8px;  --s2: 16px; --s3: 24px; --s4: 32px;
  --s5: 48px; --s6: 64px; --s7: 96px; --s8: 128px; --s9: 176px;

  /* Grid */
  --page-max: 1440px;
  --gutter: 40px;

  /* Motion */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --dur: 420ms;
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-soft);
  background: var(--ground);
  text-wrap: pretty;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul, ol { list-style: none; }

::selection { background: var(--accent); color: #fff; }

/* ---------- 3. Layout primitives ---------- */
.wrap {
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.grid12 {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--s3);
}
.grid12 > * { min-width: 0; }
.rule { border-top: 1px solid var(--rule); }
.rule-ink { border-top: 1px solid var(--ink); }

section { position: relative; }
.section { padding-block: var(--s8); }
.section--tight { padding-block: var(--s7); }

/* ---------- 4. Type scale (Pentagram: colossal display) ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink);
  line-height: .94;
  letter-spacing: -.035em;
  text-wrap: balance;
}
.d-xl { font-size: clamp(3.4rem, 8.2vw, 8.6rem); }
.d-lg { font-size: clamp(2.8rem, 6.4vw, 6.4rem); }
.d-md { font-size: clamp(2.2rem, 4.4vw, 4.4rem); }
.d-sm { font-size: clamp(1.7rem, 3vw, 2.9rem); }

.h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.15rem, 1.7vw, 1.5rem);
  line-height: 1.28;
  letter-spacing: -.015em;
  color: var(--ink);
  text-wrap: pretty;
}
.lede {
  font-size: clamp(1.05rem, 1.5vw, 1.34rem);
  line-height: 1.62;
  color: var(--ink-soft);
  max-width: 60ch;
}
.body p + p { margin-top: var(--s2); }
.mono {
  font-family: var(--font-mono);
  font-size: .688rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.mono--ink { color: var(--ink); }
.mono--accent { color: var(--accent); }

/* ---------- 5. Header ---------- */
.hdr {
  position: fixed; inset: 0 0 auto 0; z-index: 900;
  background: rgba(251,250,247,.86);
  backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.hdr.is-stuck { border-bottom-color: var(--rule); }
.hdr__in {
  display: flex; align-items: center; justify-content: space-between;
  height: 78px; gap: var(--s4);
}
.brand { display: flex; align-items: center; gap: 13px; flex-shrink: 0; }
.brand__mark {
  width: 40px; height: 40px; flex-shrink: 0;
  object-fit: contain; display: block;
}
.brand__txt { display: flex; flex-direction: column; line-height: 1.1; min-width: 0; }
.brand__cn {
  font-family: var(--font-display); font-weight: 700; font-size: 1.16rem;
  color: var(--ink); letter-spacing: .04em;
}
.brand__en {
  font-family: var(--font-mono); font-size: .563rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-mute); margin-top: 4px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* 深色底（CTA 区）中的品牌区反白；页脚为浅色底，品牌区与顶栏保持一致 */
.block--ink .brand__cn { color: #fff; }
.block--ink .brand__en { color: rgba(255,255,255,.55); }

.nav { display: flex; align-items: center; gap: var(--s4); }
.nav__link {
  font-size: .875rem; font-weight: 500; color: var(--ink-soft);
  position: relative; padding-block: 6px;
  transition: color 200ms var(--ease);
}
.nav__link::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 0;
  background: var(--accent); transition: width 260ms var(--ease);
}
.nav__link:hover { color: var(--ink); }
.nav__link:hover::after, .nav__link.is-active::after { width: 100%; }
.nav__link.is-active { color: var(--ink); }

.hdr__cta {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--ink); color: #fff;
  padding: 11px 20px; font-size: .813rem; font-weight: 600;
  letter-spacing: .02em;
  transition: background 200ms var(--ease), transform 200ms var(--ease);
}
.hdr__cta:hover { background: var(--accent); }
.hdr__cta:active { transform: translateY(1px); }

/* 语言切换 */
.lang {
  display: flex; align-items: center; gap: 1px;
  border: 1px solid var(--rule); padding: 2px;
  flex-shrink: 0;
}
.lang__btn {
  font-family: var(--font-mono); font-size: .625rem; letter-spacing: .1em;
  padding: 6px 9px; color: var(--ink-mute); text-transform: uppercase;
  transition: background 180ms var(--ease), color 180ms var(--ease);
}
.lang__btn:hover { color: var(--ink); }
.lang__btn.is-on { background: var(--ink); color: #fff; }

.hdr__right { display: flex; align-items: center; gap: var(--s3); }

.burger { display: none; width: 40px; height: 40px; position: relative; }
.burger span {
  position: absolute; left: 9px; width: 22px; height: 1.5px; background: var(--ink);
  transition: transform 260ms var(--ease), opacity 160ms linear;
}
.burger span:nth-child(1) { top: 15px; }
.burger span:nth-child(2) { top: 21px; }
.burger span:nth-child(3) { top: 27px; }
.burger.is-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.drawer {
  position: fixed; inset: 78px 0 0 0; z-index: 890;
  background: var(--ground);
  padding: var(--s5) var(--gutter) var(--s6);
  transform: translateY(-102%); visibility: hidden;
  transition: transform 420ms var(--ease), visibility 420ms;
  overflow-y: auto;
}
.drawer.is-open { transform: translateY(0); visibility: visible; }
.drawer__link {
  display: block; font-family: var(--font-display); font-weight: 600;
  font-size: 1.85rem; color: var(--ink); padding-block: 14px;
  border-bottom: 1px solid var(--rule); letter-spacing: -.02em;
}
.drawer__foot { margin-top: var(--s5); display: grid; gap: 6px; }

/* ---------- 6. Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 16px 28px; font-size: .938rem; font-weight: 600;
  letter-spacing: .01em; position: relative; overflow: hidden;
  transition: color 260ms var(--ease), border-color 260ms var(--ease);
}
.btn span { position: relative; z-index: 2; }
.btn::before {
  content: ""; position: absolute; inset: 0; z-index: 1;
  transform: scaleX(0); transform-origin: left;
  transition: transform 340ms var(--ease);
}
.btn:hover::before { transform: scaleX(1); }
.btn__arrow { position: relative; z-index: 2; transition: transform 260ms var(--ease); }
.btn:hover .btn__arrow { transform: translateX(5px); }

.btn--solid { background: var(--ink); color: #fff; }
.btn--solid::before { background: var(--accent); }

.btn--ghost { border: 1px solid var(--rule-strong); color: var(--ink); }
.btn--ghost::before { background: var(--ink); }
.btn--ghost:hover { color: #fff; }

.btn--onDark { border: 1px solid rgba(255,255,255,.42); color: #fff; }
.btn--onDark::before { background: #fff; }
.btn--onDark:hover { color: var(--ink); }

.link-arrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: .875rem; font-weight: 600; color: var(--ink);
  border-bottom: 1px solid var(--ink); padding-bottom: 4px;
  transition: color 200ms var(--ease), border-color 200ms var(--ease), gap 200ms var(--ease);
}
.link-arrow:hover { color: var(--accent); border-color: var(--accent); gap: 16px; }

/* ---------- 7. Hero ---------- */
.hero { padding-top: 168px; padding-bottom: var(--s6); }
.hero__meta {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: var(--s3); padding-bottom: var(--s3); margin-bottom: var(--s5);
  border-bottom: 1px solid var(--ink);
  flex-wrap: wrap;
}
.hero__meta .mono { white-space: nowrap; }
.hero__meta .mono:nth-child(2) { flex: 1 1 auto; text-align: center; }
.hero__title { position: relative; }
.hero__title .ln { display: block; overflow: hidden; }
.hero__title .ln > i {
  display: block; font-style: normal;
  transform: translateY(105%);
  animation: rise 900ms var(--ease) forwards;
}
.hero__title .ln:nth-child(2) > i { animation-delay: 110ms; }
.hero__title .ln:nth-child(3) > i { animation-delay: 220ms; }
@keyframes rise { to { transform: translateY(0); } }

.hero__sub {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: var(--s5); align-items: end;
  margin-top: var(--s5);
}
.hero__sub .lede { max-width: 46ch; }

.flagpair { display: flex; gap: 4px; align-items: center; }
.flag {
  display: grid; place-items: center;
  width: 52px; height: 38px; flex-shrink: 0;
}
.flag svg { width: 100%; height: 100%; }
.flag--cn svg, .flag--mx svg, .flag--ar svg { border: 1px solid var(--rule); }

/* Stat bar */
.statbar {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
  margin-top: var(--s6);
}
.stat { padding: var(--s4) var(--s3) var(--s4) 0; border-right: 1px solid var(--rule); }
.stat:last-child { border-right: none; }
.stat__num {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2.1rem, 3.6vw, 3.4rem); line-height: 1;
  letter-spacing: -.04em; color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.stat__num em { font-style: normal; font-size: .42em; letter-spacing: 0; margin-left: 4px; }
.stat__lbl { margin-top: 12px; font-size: .813rem; color: var(--ink-mute); line-height: 1.5; }

/* ---------- 8. Marquee ---------- */
.marquee {
  border-bottom: 1px solid var(--rule);
  overflow: hidden; background: var(--surface);
  padding-block: 18px;
}
.marquee__row {
  display: flex; gap: var(--s5); width: max-content;
  animation: slide 42s linear infinite;
}
.marquee__row span {
  font-family: var(--font-mono); font-size: .688rem;
  letter-spacing: .2em; text-transform: uppercase; color: var(--ink-mute);
  white-space: nowrap;
}
.marquee__row span b { color: var(--ink); font-weight: 600; }
@keyframes slide { to { transform: translateX(-50%); } }

/* ---------- 9. Numbered sections ---------- */
.sec-head {
  display: grid; grid-template-columns: 92px 1fr; gap: var(--s4);
  padding-top: var(--s4); border-top: 1px solid var(--ink);
  margin-bottom: var(--s6);
}
.sec-head__num {
  font-family: var(--font-mono); font-size: .75rem; letter-spacing: .14em;
  color: var(--accent);
}
.sec-head__body { max-width: 74ch; }
.sec-head__body .display { margin-bottom: var(--s3); }

/* ---------- 10. Service rows (spreads, not cards) ---------- */
.svc { border-top: 1px solid var(--rule); }
.svc__row {
  display: grid; grid-template-columns: 92px 1.05fr 1.35fr;
  gap: var(--s4); padding-block: var(--s5);
  border-bottom: 1px solid var(--rule);
  position: relative; transition: background 300ms var(--ease);
  color: inherit;
}
/* 可点击的文章行：标题下方出现「阅读全文 →」 */
a.svc__row { cursor: pointer; }
a.svc__row .svc__tags::after {
  content: "阅读全文 →"; font-family: var(--font-mono); font-size: .625rem;
  letter-spacing: .1em; color: var(--accent); align-self: center;
  margin-left: 4px; opacity: 0; transform: translateX(-6px);
  transition: opacity 300ms var(--ease), transform 300ms var(--ease);
}
a.svc__row:hover .svc__tags::after { opacity: 1; transform: none; }
.svc__row::after {
  content: ""; position: absolute; left: 0; bottom: -1px; height: 2px; width: 0;
  background: var(--accent); transition: width 460ms var(--ease);
}
.svc__row:hover::after { width: 100%; }
.svc__row:hover { background: var(--surface); }
.svc__num { font-family: var(--font-mono); font-size: .75rem; color: var(--ink-mute); letter-spacing: .12em; }
.svc__tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: var(--s3); }
.tag {
  font-family: var(--font-mono); font-size: .625rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-mute);
  border: 1px solid var(--rule); padding: 5px 10px;
}
.svc__desc { color: var(--ink-soft); font-size: .969rem; }

/* ---------- 11. Color block / market panel ---------- */
.block { padding: var(--s7) var(--s6); position: relative; overflow: hidden; }
.block--ink { background: var(--ink); color: #fff; }
.block--accent { background: var(--accent); color: #fff; }
.block--surface { background: var(--surface); }
.block--mx { background: var(--mx); color: #fff; }
.block--ar { background: var(--ar); color: var(--ink); }
.block .display, .block h3 { color: inherit; }
.block__num {
  position: absolute; right: var(--s4); top: var(--s4);
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(5rem, 13vw, 12rem); line-height: .8;
  opacity: .12; letter-spacing: -.05em; user-select: none;
}
.block--accent .block__num { opacity: .18; }

.markets { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--rule); }
.market { padding: var(--s6) var(--s5); }
.market .mono { color: rgba(255,255,255,.62); }
.market--ar .mono { color: rgba(16,17,20,.55); }
.market__title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2.4rem, 5vw, 4.2rem); line-height: .98;
  letter-spacing: -.04em; margin: var(--s3) 0 var(--s2);
}
.market__en { font-family: var(--font-mono); font-size: .688rem; letter-spacing: .18em; text-transform: uppercase; opacity: .7; }
.market__list { margin-top: var(--s4); border-top: 1px solid rgba(255,255,255,.22); }
.market--ar .market__list { border-top-color: rgba(16,17,20,.2); }
.market__list li {
  padding-block: 13px; border-bottom: 1px solid rgba(255,255,255,.16);
  font-size: .906rem; display: flex; gap: 12px; align-items: baseline;
}
.market--ar .market__list li { border-bottom-color: rgba(16,17,20,.14); }
.market__list li::before {
  content: ""; width: 5px; height: 5px; background: currentColor;
  flex-shrink: 0; transform: translateY(-3px); opacity: .65;
}

/* ---------- 11b. 摄影图 ---------- */
.photo { position: relative; overflow: hidden; background: var(--surface); }
.photo img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  filter: saturate(.9) contrast(1.02);
  transition: transform 900ms var(--ease);
}
.photo:hover img { transform: scale(1.035); }
.photo--wide { aspect-ratio: 16/7; }
.photo--tall { aspect-ratio: 4/5; }
.photo--sq { aspect-ratio: 1/1; }
.photo__cap {
  position: absolute; left: 0; bottom: 0;
  background: rgba(16,17,20,.82); color: #fff;
  padding: 10px 16px;
}
.photo__cap .mono { color: rgba(255,255,255,.85); }

/* 双图并置（市场页） */
.photoPair { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--rule); }
.photoPair > * { position: relative; }
.photoPair img { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; filter: saturate(.9) contrast(1.02); }
.photoPair figcaption {
  position: absolute; left: 0; bottom: 0; right: 0;
  background: linear-gradient(to top, rgba(16,17,20,.86), rgba(16,17,20,0));
  padding: 40px 20px 16px; color: #fff;
}
.photoPair figcaption .mono { color: rgba(255,255,255,.8); }

/* 首页横幅图带 */
.band { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--rule); }
.band figure { position: relative; overflow: hidden; background: var(--surface); margin: 0; }
.band img {
  width: 100%; aspect-ratio: 3/2; object-fit: cover; display: block;
  filter: saturate(.88) contrast(1.03);
  transition: transform 800ms var(--ease);
}
.band figure:hover img { transform: scale(1.04); }
.band figcaption {
  position: absolute; inset: auto 0 0 0;
  background: linear-gradient(to top, rgba(16,17,20,.88), rgba(16,17,20,0));
  padding: 48px 20px 16px;
}
.band figcaption .h3 { color: #fff; font-size: 1.05rem; }
.band figcaption .mono { color: rgba(255,255,255,.75); }

@media (max-width: 960px) {
  .band { grid-template-columns: 1fr 1fr; }
  .band figure:last-child { grid-column: 1 / -1; }
}
@media (max-width: 620px) {
  .band { grid-template-columns: 1fr; }
  .band figure:last-child { grid-column: auto; }
  .photoPair { grid-template-columns: 1fr; }
  .photo--wide { aspect-ratio: 4/3; }
}

/* ---------- 12. Process ---------- */
.process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--rule); }
.step { background: var(--ground); padding: var(--s5) var(--s4); }
.step__num {
  font-family: var(--font-mono); font-size: .688rem; letter-spacing: .16em;
  color: var(--accent); margin-bottom: var(--s4); display: block;
}
.step .h3 { margin-bottom: 12px; }
.step p { font-size: .875rem; color: var(--ink-mute); line-height: 1.65; }

/* ---------- 13. Team / expertise ---------- */
.expertise { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s5); }
.exp__bar { height: 3px; background: var(--ink); margin-bottom: var(--s3); transition: background 300ms var(--ease); }
.exp:hover .exp__bar { background: var(--accent); }
.exp p { font-size: .906rem; color: var(--ink-mute); margin-top: 10px; }

/* ---------- 14. Insights ---------- */
.insights { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--rule); }
.ins { background: var(--ground); padding: var(--s5); display: flex; flex-direction: column; gap: var(--s3); transition: background 300ms var(--ease); color: inherit; }
.ins .h3 { transition: color 240ms var(--ease); }
a.ins:hover .h3 { color: var(--accent); }
.ins:hover { background: var(--surface); }
.ins__cat { font-family: var(--font-mono); font-size: .625rem; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
.ins .h3 { flex: 1; }
.ins__foot { display: flex; justify-content: space-between; align-items: center; padding-top: var(--s2); border-top: 1px solid var(--rule); }

/* ---------- 15. CTA band ---------- */
.cta { background: var(--ink); color: #fff; padding-block: var(--s8); position: relative; overflow: hidden; }
.cta .display { color: #fff; }
.cta__in { display: grid; grid-template-columns: 1.4fr 1fr; gap: var(--s6); align-items: end; }
.cta .lede { color: rgba(255,255,255,.72); }
.cta__acts { display: flex; flex-direction: column; gap: var(--s3); align-items: flex-start; }

/* ---------- 16. Footer ---------- */
.ftr { background: var(--ground); padding-top: var(--s7); padding-bottom: var(--s5); }
.ftr__top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: var(--s5); padding-bottom: var(--s6); }
.ftr__blurb { font-size: .875rem; color: var(--ink-mute); max-width: 36ch; margin-top: var(--s3); line-height: 1.7; }
.ftr__col h4 {
  font-family: var(--font-mono); font-size: .625rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--ink); margin-bottom: var(--s3); font-weight: 600;
}
.ftr__col li { margin-bottom: 11px; }
.ftr__col a { font-size: .875rem; color: var(--ink-mute); transition: color 200ms var(--ease); }
.ftr__col a:hover { color: var(--accent); }
.ftr__btm {
  border-top: 1px solid var(--rule); padding-top: var(--s4);
  display: flex; justify-content: space-between; gap: var(--s3); flex-wrap: wrap;
}

/* ---------- 17. Inner page hero ---------- */
.phero { padding-top: 158px; padding-bottom: var(--s6); }
.phero__crumb { display: flex; gap: 10px; align-items: center; margin-bottom: var(--s5); }
.phero__crumb a:hover { color: var(--accent); }
.phero__grid { display: grid; grid-template-columns: 1.35fr 1fr; gap: var(--s6); align-items: end; }

/* ---------- 17b. Article page ---------- */
.ahero { padding-top: 158px; padding-bottom: var(--s6); border-bottom: 1px solid var(--rule); }
.ahero__crumb { display: flex; gap: 10px; align-items: center; margin-bottom: var(--s5); flex-wrap: wrap; }
.ahero__crumb a:hover { color: var(--accent); }
.ahero__grid { display: grid; grid-template-columns: 1fr 260px; gap: var(--s6); align-items: end; }
.ahero__cat {
  font-family: var(--font-mono); font-size: .625rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--accent); margin-bottom: var(--s3); display: block;
}
.ahero__t { font-size: clamp(2.1rem, 4.6vw, 4.1rem); }
.ahero__lede { margin-top: var(--s4); max-width: 62ch; }
.ahero__meta { border-left: 1px solid var(--rule); padding-left: var(--s4); display: flex; flex-direction: column; gap: 10px; }
.ahero__meta span { font-family: var(--font-mono); font-size: .625rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-mute); }

/* 正文排版 */
.prose { padding-block: var(--s7); }
.prose__grid {
  position: relative;
  max-width: 980px;
  margin-inline: auto;
  padding-left: 216px;   /* 左侧留给目录 */
}
.prose h2 {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.4rem, 2.4vw, 2.05rem); line-height: 1.2; letter-spacing: -.022em;
  color: var(--ink); margin-top: var(--s6); margin-bottom: var(--s3);
}
.prose__grid > h2:first-child { margin-top: 0; }
.prose p { font-size: 1.031rem; line-height: 1.82; color: var(--ink-soft); max-width: 68ch; }
.prose p + p { margin-top: var(--s3); }
.prose em { font-style: normal; background: var(--accent-tint); padding: 1px 5px; }

/* 要点列表（小标题 + 说明） */
.points { margin-top: var(--s4); border-top: 1px solid var(--ink); max-width: 68ch; }
.points__item { padding-block: var(--s4); border-bottom: 1px solid var(--rule); }
.points__t {
  font-family: var(--font-display); font-weight: 600; font-size: 1.06rem;
  color: var(--ink); margin-bottom: 8px; display: flex; gap: 12px; align-items: baseline;
}
.points__t::before {
  content: ""; width: 6px; height: 6px; background: var(--accent);
  flex-shrink: 0; transform: translateY(-2px);
}
.points__d { font-size: .969rem; line-height: 1.78; color: var(--ink-soft); padding-left: 18px; }

/* 侧栏目录：绝对定位在左栏，随页面滚动 */
.prose__toc {
  position: absolute; left: 0; top: 0; width: 176px;
}
.prose__toc h4 {
  font-family: var(--font-mono); font-size: .625rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink); margin-bottom: var(--s3);
  padding-bottom: 10px; border-bottom: 1px solid var(--ink);
}
.prose__toc a { display: block; font-size: .813rem; color: var(--ink-mute); padding-block: 7px; transition: color 200ms var(--ease); }
.prose__toc a:hover { color: var(--accent); }

/* 结论条 */
.takeaway { margin-top: var(--s6); background: var(--ink); color: #fff; padding: var(--s5) var(--s6); }
.takeaway h3 {
  font-family: var(--font-mono); font-size: .625rem; letter-spacing: .16em;
  text-transform: uppercase; color: rgba(255,255,255,.55); margin-bottom: var(--s4);
}
.takeaway ol { counter-reset: tk; display: grid; gap: var(--s3); }
.takeaway li {
  counter-increment: tk; position: relative; padding-left: 44px;
  font-size: 1.031rem; line-height: 1.66; color: rgba(255,255,255,.92);
}
.takeaway li::before {
  content: "0" counter(tk); position: absolute; left: 0; top: 2px;
  font-family: var(--font-mono); font-size: .75rem; letter-spacing: .1em; color: var(--accent);
}

/* 免责 + 落款 */
.prose__foot { margin-top: var(--s6); padding-top: var(--s4); border-top: 1px solid var(--rule); max-width: 68ch; }
.prose__foot p { font-size: .813rem; line-height: 1.72; color: var(--ink-mute); }
.prose__sign { margin-top: var(--s4); display: flex; justify-content: space-between; gap: var(--s4); flex-wrap: wrap; }
.prose__sign span { font-family: var(--font-mono); font-size: .625rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-mute); }

/* 相关阅读 */
.related { background: var(--surface); padding-block: var(--s7); }
.related__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--rule); margin-top: var(--s5); }
.related__card { background: var(--surface); padding: var(--s5); display: flex; flex-direction: column; gap: var(--s3); transition: background 300ms var(--ease); }
.related__card:hover { background: var(--ground); }
.related__cat { font-family: var(--font-mono); font-size: .625rem; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
.related__card .h3 { flex: 1; }
.related__card:hover .h3 { color: var(--accent); }

@media (max-width: 1100px) {
  .prose__grid { padding-left: 0; }
  .prose__toc { display: none; }
  .ahero__grid { grid-template-columns: 1fr; gap: var(--s4); }
  .ahero__meta { border-left: 0; border-top: 1px solid var(--rule); padding-left: 0; padding-top: var(--s3); flex-direction: row; flex-wrap: wrap; gap: var(--s4); }
  .related__grid { grid-template-columns: 1fr; }
}

/* ---------- 18. Accordion ---------- */
.acc { border-top: 1px solid var(--ink); }
.acc__item { border-bottom: 1px solid var(--rule); }
.acc__btn {
  width: 100%; display: grid; grid-template-columns: 64px 1fr 32px;
  gap: var(--s3); align-items: center; text-align: left;
  padding-block: var(--s4); transition: color 240ms var(--ease);
}
.acc__btn:hover { color: var(--accent); }
.acc__q { font-family: var(--font-display); font-weight: 600; font-size: 1.06rem; color: var(--ink); transition: color 240ms var(--ease); }
.acc__btn:hover .acc__q { color: var(--accent); }
.acc__ico { position: relative; width: 18px; height: 18px; justify-self: end; }
.acc__ico::before, .acc__ico::after {
  content: ""; position: absolute; background: currentColor; transition: transform 300ms var(--ease), opacity 300ms;
}
.acc__ico::before { left: 0; top: 8px; width: 18px; height: 1.5px; }
.acc__ico::after { top: 0; left: 8px; width: 1.5px; height: 18px; }
.acc__item.is-open .acc__ico::after { transform: scaleY(0); }
.acc__panel { overflow: hidden; height: 0; transition: height 380ms var(--ease); }
.acc__panel > div { padding-bottom: var(--s4); max-width: 78ch; }
.acc__panel { display: grid; grid-template-columns: 64px 1fr; gap: var(--s3); }

/* ---------- 19. Form ---------- */
.form { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s4); }
.field { display: flex; flex-direction: column; gap: 9px; }
.field--full { grid-column: 1 / -1; }
.field label { font-family: var(--font-mono); font-size: .625rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-mute); }
.field input, .field select, .field textarea {
  font-family: inherit; font-size: .938rem; color: var(--ink);
  padding: 13px 0; border: none; border-bottom: 1px solid var(--rule);
  background: transparent; transition: border-color 220ms var(--ease);
  border-radius: 0; appearance: none;
}
.field textarea { resize: vertical; min-height: 110px; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-bottom-color: var(--ink);
}
.field input::placeholder, .field textarea::placeholder { color: #B4B7BE; }
.field select { background-image: none; }

.contactinfo { display: grid; gap: var(--s4); }
.ci { padding-bottom: var(--s3); border-bottom: 1px solid var(--rule); }
.ci h4 { font-family: var(--font-mono); font-size: .625rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink); margin-bottom: 10px; }
.ci p { font-size: .906rem; color: var(--ink-soft); }

/* ---------- 20. Utilities ---------- */
.mt-s3 { margin-top: var(--s3); } .mt-s4 { margin-top: var(--s4); }
.mt-s5 { margin-top: var(--s5); } .mt-s6 { margin-top: var(--s6); }
.two-col { display: grid; grid-template-columns: 92px 1fr; gap: var(--s4); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s6); align-items: start; }
.split--wide { grid-template-columns: 1.25fr 1fr; }
.lede-list li {
  padding-block: var(--s2); border-bottom: 1px solid var(--rule);
  display: grid; grid-template-columns: 84px 1fr; gap: var(--s3); font-size: .938rem;
}
.lede-list li span:first-child { font-family: var(--font-mono); font-size: .688rem; letter-spacing: .12em; color: var(--ink-mute); text-transform: uppercase; padding-top: 4px; }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 700ms var(--ease), transform 700ms var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 21. Tweaks ---------- */
.twk-toggle {
  position: fixed; right: 22px; bottom: 22px; z-index: 950;
  width: 46px; height: 46px; background: var(--ink); color: #fff;
  display: grid; place-items: center; font-family: var(--font-mono);
  font-size: .625rem; letter-spacing: .08em;
  transition: background 200ms var(--ease);
}
.twk-toggle:hover { background: var(--accent); }
.twk {
  position: fixed; right: 22px; bottom: 80px; z-index: 950; width: 274px;
  background: var(--ink); color: #fff; padding: 18px;
  display: none; flex-direction: column; gap: 15px;
}
.twk.is-open { display: flex; }
.twk__h { font-family: var(--font-mono); font-size: .625rem; letter-spacing: .16em; text-transform: uppercase; opacity: .75; }
.twk__row { display: flex; flex-direction: column; gap: 7px; }
.twk__row label { font-size: .75rem; opacity: .68; }
.twk__sw { display: flex; gap: 8px; }
.twk__sw button { width: 26px; height: 26px; border: 1px solid rgba(255,255,255,.28); }
.twk__sw button.is-on { outline: 2px solid #fff; outline-offset: 2px; }
.twk__seg { display: flex; border: 1px solid rgba(255,255,255,.24); }
.twk__seg button { flex: 1; padding: 7px 0; font-size: .688rem; color: rgba(255,255,255,.62); }
.twk__seg button.is-on { background: #fff; color: var(--ink); }

/* ---------- 22. Responsive ---------- */
@media (max-width: 1180px) {
  :root { --gutter: 28px; }
  .nav { gap: var(--s3); }
  .hdr__cta { display: none; }
  .ftr__top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 960px) {
  :root { --s8: 96px; --s7: 72px; --s6: 48px; }
  .nav { display: none; }
  .burger { display: block; }
  .hero { padding-top: 130px; }
  .hero__sub { grid-template-columns: 1fr; gap: var(--s4); }
  .statbar { grid-template-columns: 1fr 1fr; }
  .stat { border-bottom: 1px solid var(--rule); padding-right: var(--s3); }
  .stat:nth-child(2n) { border-right: none; }
  .stat:nth-last-child(-n+2) { border-bottom: none; }
  .sec-head { grid-template-columns: 52px 1fr; }
  .svc__row { grid-template-columns: 52px 1fr; row-gap: var(--s3); }
  .svc__row > .svc__num { grid-column: 1; }
  .process { grid-template-columns: 1fr 1fr; }
  .markets { grid-template-columns: 1fr; }
  .expertise { grid-template-columns: 1fr; gap: var(--s5); }
  .insights { grid-template-columns: 1fr; }
  .cta__in { grid-template-columns: 1fr; gap: var(--s5); }
  .phero__grid { grid-template-columns: 1fr; gap: var(--s5); }
  .split, .split--wide { grid-template-columns: 1fr; gap: var(--s5); }
  .form { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; gap: var(--s3); }
  .block { padding: var(--s6) var(--s4); }
}

@media (max-width: 620px) {
  :root { --gutter: 20px; --s8: 76px; --s7: 58px; }
  body { font-size: 15px; overflow-x: hidden; }
  /* 文章页窄屏收紧 */
  .ahero { padding-top: 130px; }
  .ahero__t { font-size: clamp(1.7rem, 9vw, 2.4rem); }
  .ahero__lede { font-size: 1rem; }
  .prose__grid { max-width: 100%; }
  .prose p, .points, .prose__foot { max-width: 100%; }
  .takeaway { padding: var(--s4); }
  .takeaway li { padding-left: 34px; font-size: .969rem; }
  .points__d { padding-left: 0; }
  .prose__sign { flex-direction: column; gap: var(--s2); }
  /* 顶栏在窄屏收紧：品牌英文名限宽省略、语言按钮缩小、间距压缩 */
  .hdr__in { gap: 10px; }
  .brand { gap: 9px; min-width: 0; }
  .brand__txt { min-width: 0; overflow: hidden; }
  .brand__en { max-width: 96px; }
  .hdr__right { gap: 8px; flex-shrink: 0; }
  .lang { padding: 1px; }
  .lang__btn { padding: 5px 6px; font-size: .563rem; letter-spacing: .06em; }
  .burger { width: 34px; }
  .d-xl { font-size: clamp(2.5rem, 12vw, 3.6rem); }
  .hero__meta { gap: 10px; }
  .hero__meta .mono:nth-child(2) { display: none; }
  .hero__meta .mono { font-size: .625rem; white-space: normal; }
  .flagpair { order: -1; }
  .flag { width: 42px; height: 30px; }
  .stat__num { font-size: clamp(1.9rem, 11vw, 2.8rem); }
  .stat__lbl { font-size: .75rem; }
  .process { grid-template-columns: 1fr; }
  .ftr__top { grid-template-columns: 1fr; gap: var(--s5); }
  .lede-list li { grid-template-columns: 1fr; gap: 4px; }
  .acc__btn { grid-template-columns: 40px 1fr 24px; gap: 12px; }
  .acc__panel { grid-template-columns: 1fr; }
  .block__num { font-size: 5rem; right: var(--s3); top: var(--s3); }
  .cta__acts { width: 100%; }
  .cta__acts .btn { width: 100%; justify-content: space-between; }
  .btn { padding: 15px 22px; font-size: .875rem; }
  .sec-head { grid-template-columns: 1fr; gap: var(--s2); }
  .svc__row { grid-template-columns: 1fr; row-gap: 12px; }
  .svc__row > .svc__num { grid-column: auto; }
  .insights { grid-template-columns: 1fr !important; }
  .ins { padding: var(--s4); }
  .drawer__link { font-size: 1.5rem; }
  .brand__cn { font-size: 1.03rem; }
  .brand__en { font-size: .469rem; letter-spacing: .06em; }
  .brand__mark { width: 34px; height: 34px; }
  .brand { gap: 10px; }
  .phero { padding-top: 122px; }
  .hero { padding-top: 108px; }
  .twk { right: 12px; left: 12px; width: auto; bottom: 74px; }
  .twk-toggle { right: 12px; bottom: 12px; }
  .split, .split--wide { gap: var(--s4); }
  .two-col { gap: var(--s3); }
  .block { padding: var(--s5) var(--s4); }
  .market { padding: var(--s5) var(--s4); }
  .wrap { padding-inline: var(--gutter); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
  .hero__title .ln > i { transform: none; }
}

/* ---------- 23. Theme: 深夜（dark） ---------- */
html[data-theme="dark"] {
  --ink:        #F4F2ED;
  --ink-soft:   #C3C1BA;
  --ink-mute:   #8B8981;
  --ground:     #131417;
  --surface:    #1B1D21;
  --rule:       #2C2F35;
  --rule-strong:#F4F2ED;
  --accent:     #E2334F;
  --accent-tint:#2A1B1F;
  --mx:         #2C7A69;
  --ar:         #7FA6CB;
}
html[data-theme="dark"] .block--ink { background: #1B1D21; border: 1px solid var(--rule); }
html[data-theme="dark"] .hdr { background: rgba(19,20,23,.86); }
html[data-theme="dark"] .btn--solid { background: #F4F2ED; color: #131417; }
html[data-theme="dark"] .twk { background: #0B0C0E; }
html[data-theme="dark"] .block--ar { color: #131417; }