/* ============================================================
   进一步 FURTHER — institutional trading site
   ============================================================ */

:root {
  --cream: #f4f0e8;
  --cream-2: #ebe6dc;
  --paper: #faf8f4;
  --white: #ffffff;
  --ink: #141414;
  --ink-2: #1c1c1c;
  --ink-soft: #2a2a2a;
  --muted: #6a655c;
  --muted-2: #8a8478;
  --line: #ddd6c8;
  --line-dark: rgba(244, 240, 232, 0.14);
  --forest: #1e3a32;
  --forest-hover: #162e28;
  --gold: #9a8060;
  --nav-h: 76px;
  --wrap: 1180px;
  --serif: "Noto Serif SC", "Source Serif 4", "Songti SC", Georgia, "Times New Roman", serif;
  --sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

html,
body {
  overflow-x: hidden;
  max-width: 100%;
}

body {
  font-family: var(--sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font-family: inherit;
}

ul,
ol {
  list-style: none;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 100;
  background: var(--forest);
  color: var(--cream);
  padding: 8px 14px;
  border-radius: 999px;
}

.skip-link:focus {
  top: 12px;
}

.wrap {
  width: min(var(--wrap), calc(100% - 80px));
  margin-inline: auto;
}

/* ---------- Typography ---------- */

.eyebrow {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 18px;
}

.eyebrow.light {
  color: rgba(244, 240, 232, 0.62);
}

.section-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.85rem, 3.6vw, 3.15rem);
  line-height: 1.28;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.section-lead,
.body-lg {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--muted);
  max-width: 36em;
}

.body-lg {
  margin: 22px 0 16px;
}

.section-head {
  max-width: 720px;
  margin-bottom: 64px;
}

.section-head .section-lead {
  margin-top: 18px;
}

.section-head.light .section-title {
  color: var(--cream);
}

.num {
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  background: none;
  transition: background 0.35s var(--ease), color 0.35s var(--ease), border-color 0.35s var(--ease), transform 0.35s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-solid {
  background: var(--forest);
  color: var(--cream);
}

.btn-solid:hover {
  background: var(--forest-hover);
}

.btn-ghost-light {
  border-color: rgba(244, 240, 232, 0.55);
  color: var(--cream);
  background: rgba(255, 255, 255, 0.06);
}

.btn-ghost-light:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: var(--cream);
}

.btn-text-light {
  color: var(--cream);
  padding: 0 8px;
  height: 46px;
}

.btn-text-light:hover {
  opacity: 0.75;
}

.btn-light {
  background: var(--cream);
  color: var(--ink);
}

.btn-light:hover {
  background: var(--white);
}

/* ---------- Nav ---------- */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  height: var(--nav-h);
  background: var(--paper);
  border-bottom: 1px solid transparent;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease), backdrop-filter 0.4s var(--ease);
}

.nav.is-scrolled {
  background: rgba(250, 248, 244, 0.78);
  border-bottom-color: var(--line);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.nav-inner {
  width: min(1280px, calc(100% - 48px));
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 32px;
}

.logo {
  display: flex;
  flex-direction: column;
  line-height: 1;
  flex-shrink: 0;
}

.logo-zh,
.footer-brand .logo-zh {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.logo-en,
.footer-brand .logo-en {
  font-size: 9px;
  letter-spacing: 0.34em;
  color: var(--muted);
  margin-top: 5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-left: auto;
}

.nav-links a {
  font-size: 13px;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 1px;
  background: var(--forest);
  transition: width 0.35s var(--ease);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  margin-left: auto;
  border: 0;
  background: none;
  cursor: pointer;
  position: relative;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--ink);
  margin: 6px auto;
  transition: transform 0.3s var(--ease), opacity 0.3s;
}

.nav.is-open .nav-toggle span:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.nav.is-open .nav-toggle span:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  z-index: 49;
  background: var(--paper);
  padding: 40px 32px;
}

.mobile-menu[hidden] {
  display: none;
}

.mobile-menu-inner {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.mobile-menu-inner a {
  font-family: var(--serif);
  font-size: 1.6rem;
}

.mobile-menu-inner .btn {
  width: fit-content;
  margin-top: 12px;
}

body.menu-open {
  overflow: hidden;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  margin-top: var(--nav-h);
  min-height: calc(100vh - var(--nav-h));
  min-height: calc(100dvh - var(--nav-h));
  display: flex;
  align-items: flex-end;
  color: var(--cream);
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(28%) contrast(1.08) brightness(0.72);
  transform: scale(1.04);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 12, 10, 0.18) 0%, rgba(10, 12, 10, 0.28) 40%, rgba(10, 12, 10, 0.72) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(var(--wrap), calc(100% - 80px));
  margin: 0 auto 110px;
  animation: heroIn 1.1s var(--ease) both;
}

.hero h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2.4rem, 6.2vw, 4.8rem);
  line-height: 1.18;
  letter-spacing: 0.02em;
  max-width: 12em;
}

.hero-lead {
  margin: 22px 0 32px;
  max-width: 34em;
  font-size: 1.02rem;
  line-height: 1.85;
  color: rgba(244, 240, 232, 0.82);
  font-weight: 300;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 22px;
}

.scroll-hint {
  position: absolute;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: rgba(244, 240, 232, 0.7);
  font-size: 10px;
  letter-spacing: 0.28em;
}

.scroll-hint i {
  display: block;
  width: 1px;
  height: 36px;
  background: linear-gradient(180deg, rgba(244, 240, 232, 0.7), transparent);
  animation: scrollLine 1.8s ease-in-out infinite;
}

@keyframes heroIn {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes scrollLine {
  0%,
  100% {
    opacity: 0.3;
    transform: scaleY(0.7);
    transform-origin: top;
  }
  50% {
    opacity: 1;
    transform: scaleY(1);
  }
}

/* ---------- Sections ---------- */

.section {
  padding: 120px 0;
}

.section-cream {
  background: var(--cream);
}

.section-white {
  background: var(--paper);
}

.section-dark {
  background: var(--ink);
  color: var(--cream);
}

/* ---------- Philosophy ---------- */

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px 56px;
  margin-top: 72px;
  padding-top: 56px;
  border-top: 1px solid var(--line);
}

.philo-item h3 {
  font-family: var(--serif);
  font-size: 1.55rem;
  font-weight: 500;
  margin: 16px 0 12px;
}

.philo-item p {
  color: var(--muted);
  max-width: 28em;
}

/* ---------- About ---------- */

.about-layout {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 80px;
  align-items: center;
}

.about-copy p + p {
  margin-top: 16px;
  color: var(--muted);
}

.about-media {
  position: relative;
  overflow: hidden;
}

.about-media img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  filter: grayscale(35%) contrast(1.05) brightness(0.88);
  transition: transform 1.2s var(--ease);
}

.about-media:hover img {
  transform: scale(1.04);
}

.about-media figcaption {
  position: absolute;
  left: 20px;
  bottom: 18px;
  font-size: 10px;
  letter-spacing: 0.26em;
  color: rgba(244, 240, 232, 0.8);
}

/* ---------- Business cards ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.biz-card {
  background: var(--paper);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid transparent;
  transition: border-color 0.4s var(--ease), transform 0.4s var(--ease);
}

.biz-card:hover {
  border-color: var(--line);
  transform: translateY(-4px);
}

.biz-card-media {
  overflow: hidden;
}

.biz-card-media img {
  width: 100%;
  aspect-ratio: 16 / 11;
  object-fit: cover;
  filter: grayscale(55%) contrast(1.08) brightness(0.88);
  transition: transform 1s var(--ease);
}

.biz-card:hover .biz-card-media img {
  transform: scale(1.05);
}

.biz-card-body {
  padding: 28px 26px 32px;
}

.biz-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.tag {
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--muted-2);
}

.biz-card h3 {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 500;
  margin-bottom: 10px;
}

.biz-card p {
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------- Numbers ---------- */

.numbers {
  padding: 110px 0 100px;
}

.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px 32px;
  padding-top: 20px;
}

.number-value {
  display: block;
  font-family: var(--serif);
  font-size: clamp(3rem, 5.5vw, 4.6rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cream);
  font-variant-numeric: tabular-nums;
}

.number-item h3 {
  margin: 18px 0 8px;
  font-size: 1rem;
  font-weight: 500;
}

.number-item p {
  color: rgba(244, 240, 232, 0.55);
  font-size: 0.92rem;
}

/* ---------- Why ---------- */

.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
}

.why-item {
  padding: 40px 48px 40px 0;
  border-bottom: 1px solid var(--line);
}

.why-item:nth-child(odd) {
  padding-right: 48px;
  border-right: 1px solid var(--line);
}

.why-item:nth-child(even) {
  padding-left: 48px;
}

.why-item h3 {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 500;
  margin: 14px 0 10px;
}

.why-item p {
  color: var(--muted);
  max-width: 34em;
}

/* ---------- Recruit ---------- */

.recruit {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  padding: 0;
  min-height: 640px;
  background: var(--ink);
  color: var(--cream);
}

.recruit-media {
  overflow: hidden;
}

.recruit-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(45%) contrast(1.08) brightness(0.62);
  transition: transform 1.4s var(--ease);
}

.recruit:hover .recruit-media img {
  transform: scale(1.04);
}

.recruit-panel {
  padding: 88px 72px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.recruit .section-title {
  color: var(--cream);
}

.recruit .body-lg {
  color: rgba(244, 240, 232, 0.72);
}

.recruit-focus {
  margin: 32px 0 0;
}

.recruit-label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin-bottom: 16px;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip-list li {
  border: 1px solid var(--line-dark);
  padding: 7px 14px;
  font-size: 13px;
  color: rgba(244, 240, 232, 0.82);
}

/* ---------- Timeline ---------- */

.timeline {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 28px;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 11px;
  height: 1px;
  background: var(--line);
}

.timeline li {
  position: relative;
  padding-top: 36px;
}

.timeline .num {
  position: relative;
  z-index: 1;
  display: inline-block;
  background: var(--cream);
  padding-right: 10px;
}

.timeline h3 {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 500;
  margin: 14px 0 8px;
}

.timeline p {
  color: var(--muted);
  font-size: 0.92rem;
}

/* ---------- Quote ---------- */

.quote-section {
  background: var(--cream);
  padding: 140px 0 150px;
  text-align: center;
}

.quote-text {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.7rem, 4.2vw, 3.35rem);
  line-height: 1.45;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.quote-note {
  margin-top: 36px;
  color: var(--muted);
  font-size: 0.95rem;
  letter-spacing: 0.08em;
}

/* ---------- Insights ---------- */

.insight-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px 22px;
}

.insight-card {
  display: grid;
  cursor: default;
}

.insight-media {
  overflow: hidden;
}

.insight-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  filter: grayscale(42%) contrast(1.05) brightness(0.9);
  transition: transform 1s var(--ease);
}

.insight-card:hover img {
  transform: scale(1.045);
}

.insight-body {
  padding: 18px 2px 8px;
}

.insight-cat {
  display: block;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gold);
  margin-bottom: 8px;
}

.insight-cat em {
  font-style: normal;
  margin-right: 8px;
  font-family: var(--serif);
}

.insight-card h3 {
  font-family: var(--serif);
  font-size: 1.28rem;
  font-weight: 500;
  line-height: 1.45;
}

/* ---------- Final CTA ---------- */

.final-cta {
  position: relative;
  min-height: 72vh;
  display: flex;
  align-items: center;
  color: var(--cream);
  overflow: hidden;
}

.final-cta-media {
  position: absolute;
  inset: 0;
}

.final-cta-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(50%) contrast(1.1) brightness(0.38);
}

.final-cta-inner {
  position: relative;
  z-index: 1;
  padding: 120px 0;
  max-width: 880px;
}

.final-cta h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.2;
}

.final-lead {
  margin: 20px 0 0;
  max-width: none;
  color: rgba(244, 240, 232, 0.78);
  font-weight: 300;
}

@media (min-width: 900px) {
  .final-lead {
    white-space: nowrap;
  }
}

/* ---------- Footer ---------- */

.footer {
  background: var(--ink);
  color: var(--cream);
  padding: 72px 0 36px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 64px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--line-dark);
}

.footer-tagline {
  margin-top: 18px;
  color: rgba(244, 240, 232, 0.55);
  max-width: 16em;
}

.footer-cols {
  display: flex;
  gap: 80px;
}

.footer-head {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
}

.footer-cols a,
.footer-cols p {
  display: block;
  color: rgba(244, 240, 232, 0.7);
  font-size: 0.95rem;
  margin-bottom: 10px;
}

.footer-cols a:hover {
  color: var(--cream);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding-top: 28px;
  font-size: 12px;
  color: rgba(244, 240, 232, 0.42);
}

.footer-disclaimer {
  max-width: 36em;
  text-align: right;
}

.no-js .reveal {
  opacity: 1;
  transform: none;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.85s var(--ease), transform 0.85s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

.reveal-delay {
  transition-delay: 0.12s;
}

.reveal-delay-2 {
  transition-delay: 0.24s;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal,
  .hero-content,
  .hero-img,
  .scroll-hint i {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 1200px) {
  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .wrap {
    width: min(var(--wrap), calc(100% - 48px));
  }

  .hero-content {
    width: min(var(--wrap), calc(100% - 48px));
  }

  .philosophy-grid,
  .card-grid,
  .numbers-grid {
    grid-template-columns: 1fr 1fr;
  }

  .timeline {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .timeline::before {
    display: none;
  }

  .timeline li {
    padding: 24px 0 24px 20px;
    border-left: 1px solid var(--line);
  }

  .about-layout,
  .recruit {
    grid-template-columns: 1fr;
  }

  .about-media img {
    aspect-ratio: 16 / 10;
  }

  .recruit-media {
    min-height: 280px;
    max-height: 360px;
  }

  .recruit-panel {
    padding: 64px 40px 80px;
  }

  .insight-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  :root {
    --nav-h: 64px;
  }

  .section {
    padding: 80px 0;
  }

  .wrap,
  .hero-content {
    width: calc(100% - 36px);
  }

  .nav-inner {
    width: calc(100% - 28px);
  }

  .hero {
    min-height: calc(92vh - var(--nav-h));
  }

  .hero-content {
    margin-bottom: 92px;
  }

  .hero-lead {
    font-size: 0.95rem;
  }

  .philosophy-grid,
  .card-grid,
  .numbers-grid,
  .insight-grid,
  .why-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .philosophy-grid {
    margin-top: 40px;
    padding-top: 36px;
  }

  .why-item,
  .why-item:nth-child(odd),
  .why-item:nth-child(even) {
    padding: 28px 0;
    border-right: 0;
  }

  .about-layout {
    gap: 36px;
  }

  .section-head {
    margin-bottom: 40px;
  }

  .quote-section {
    padding: 88px 0 96px;
    text-align: left;
  }

  .footer-top,
  .footer-bottom,
  .footer-cols {
    flex-direction: column;
    gap: 36px;
  }

  .footer-disclaimer {
    text-align: left;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .final-cta-inner {
    padding: 88px 0;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2.15rem;
  }

  .chip-list li {
    font-size: 12px;
  }
}