:root {
  --black: #171717;
  --ink: #24211d;
  --charcoal: #2b2b2b;
  --muted: #6e6960;
  --line: #d8d2c8;
  --paper: #f7f7f5;
  --soft: #ece8df;
  --gold: #c9a24d;
  --gold-deep: #8f6d23;
  --white: #fffaf0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.7;
}

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

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

h1,
h2,
h3,
p,
li,
dt,
dd,
label,
a,
span {
  overflow-wrap: anywhere;
}

.site-header {
  position: fixed;
  z-index: 20;
  inset: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 54px);
  color: var(--white);
  background: rgba(10, 10, 10, 0.82);
  border-bottom: 1px solid rgba(201, 162, 77, 0.24);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 216px;
}

.brand img {
  width: 46px;
  height: 46px;
  object-fit: contain;
  border: 0;
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.15;
}

.brand strong {
  font-size: 16px;
}

.brand small {
  margin-top: 4px;
  color: var(--gold);
  font-size: 11px;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.8vw, 26px);
  color: rgba(255, 250, 240, 0.82);
  font-size: 14px;
}

.nav a:hover,
.nav a.active {
  color: var(--gold);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(201, 162, 77, 0.38);
  background: transparent;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 6px auto;
  background: var(--gold);
}

.hero {
  position: relative;
  min-height: 92vh;
  overflow: hidden;
  color: var(--white);
  background: #090909;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 74% 45%, rgba(255, 255, 255, 0.12), transparent 25%),
    linear-gradient(110deg, rgba(0, 0, 0, 0.98) 0%, rgba(0, 0, 0, 0.86) 44%, rgba(20, 20, 20, 0.74) 100%);
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(201, 162, 77, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 162, 77, 0.1) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: linear-gradient(90deg, transparent, #000 42%, transparent);
}

.hero-content,
.container {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
}

.hero-content {
  position: relative;
  z-index: 1;
  min-height: 92vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 0.72fr);
  gap: clamp(34px, 6vw, 88px);
  align-items: center;
  padding: 64px 0 126px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 12px;
  font-size: clamp(52px, 8vw, 96px);
  line-height: 1.04;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.16;
}

h3 {
  font-size: 22px;
  line-height: 1.25;
}

.tagline {
  margin-bottom: 22px;
  color: var(--gold);
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 800;
}

.lead {
  max-width: 720px;
  color: rgba(255, 250, 240, 0.78);
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  color: var(--white);
  border: 1px solid rgba(201, 162, 77, 0.44);
  background: rgba(23, 23, 23, 0.7);
  font-weight: 800;
}

.btn.primary {
  color: #17120a;
  border-color: var(--gold);
  background: linear-gradient(135deg, #f1d57f, var(--gold));
}

.btn.ghost {
  background: transparent;
}

.hero-mark {
  width: min(420px, 100%);
  justify-self: center;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
}

.hero-mark img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  filter: drop-shadow(0 18px 42px rgba(0, 0, 0, 0.34));
}

.mark-caption {
  display: grid;
  gap: 4px;
  margin-top: 18px;
  color: rgba(255, 250, 240, 0.78);
}

.mark-caption strong {
  color: var(--gold);
}

section {
  padding: clamp(76px, 10vw, 120px) 0;
}

.anchor-target {
  display: block;
  height: 0;
  scroll-margin-top: 116px;
}

#contact.anchor-target {
  scroll-margin-top: 164px;
}

.band {
  background: var(--soft);
}

.dark {
  color: var(--white);
  background: linear-gradient(135deg, rgba(201, 162, 77, 0.12), transparent 34%), #111;
}

.section-head {
  max-width: 760px;
  margin-bottom: 38px;
}

.section-head.narrow {
  margin-inline: auto;
  text-align: center;
}

.method .section-head.narrow {
  max-width: 900px;
}

.question-grid,
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.question-grid article,
.case-grid article,
.principles,
.research-list article,
.lead-form,
.contact-panel {
  border: 1px solid rgba(23, 23, 23, 0.12);
  background: rgba(255, 255, 255, 0.68);
  box-shadow: 0 10px 34px rgba(23, 23, 23, 0.07);
}

.question-grid article,
.case-grid article,
.principles,
.research-list article,
.lead-form {
  padding: 28px;
}

.question-grid strong,
.research-list strong,
.num {
  color: var(--gold-deep);
  font-weight: 900;
}

.question-grid strong {
  display: block;
  margin-bottom: 12px;
  font-size: 24px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(32px, 6vw, 84px);
  align-items: start;
}

.split > *,
.question-grid > *,
.rings > *,
.service-entry-grid > *,
.process-grid > *,
.case-grid > *,
.research-list > * {
  min-width: 0;
}

.split.reverse {
  grid-template-columns: minmax(320px, 1.05fr) minmax(0, 0.95fr);
}

.principles {
  color: var(--white);
  background: var(--black);
}

.principles ul {
  margin: 0;
  padding-left: 20px;
}

.principles li + li {
  margin-top: 12px;
}

.formula {
  width: fit-content;
  max-width: 100%;
  margin: 0 auto 32px;
  padding: 14px 22px;
  color: var(--gold);
  border: 1px solid rgba(201, 162, 77, 0.36);
  background: rgba(255, 255, 255, 0.04);
  font-weight: 800;
  text-align: center;
}

.rings {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.rings article {
  min-height: 170px;
  padding: 24px 18px;
  border: 1px solid rgba(201, 162, 77, 0.28);
  background: rgba(255, 255, 255, 0.06);
}

.rings strong,
.rings span,
.research-list strong,
.research-list span {
  display: block;
}

.rings strong {
  margin-bottom: 12px;
  color: var(--gold);
  font-size: 21px;
}

.rings span {
  color: rgba(255, 250, 240, 0.76);
}

.research-list {
  display: grid;
  gap: 14px;
}

.updates-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.updates-list article {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.updates-list span {
  display: block;
  margin-bottom: 10px;
  color: var(--gold-deep);
  font-size: 13px;
  font-weight: 800;
}

.updates-list h3 {
  margin-bottom: 12px;
  font-size: 20px;
}

.updates-list p {
  color: var(--muted);
}

.text-link {
  display: inline-block;
  margin-top: 12px;
  color: var(--gold-deep);
  font-weight: 900;
  border-bottom: 1px solid currentColor;
}

.lead-form {
  display: grid;
  gap: 14px;
  color: var(--ink);
  background: var(--paper);
}

.lead-form label {
  display: grid;
  gap: 6px;
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  background: #fff;
  font: inherit;
}

textarea {
  min-height: 104px;
  resize: vertical;
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.form-note a {
  color: var(--gold-deep);
  text-decoration: underline;
}

.form-note.submitted {
  color: var(--gold-deep);
  font-weight: 800;
}

.contact-panel {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) 220px;
  gap: clamp(24px, 5vw, 58px);
  align-items: center;
  padding: clamp(24px, 5vw, 48px);
  color: var(--white);
  background: var(--black);
}

.contact-panel img {
  aspect-ratio: 1;
  object-fit: contain;
  border: 0;
}

.contact-email {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 20px 0 0;
}

.contact-email strong {
  color: var(--gold);
}

.contact-email a,
.footer a {
  color: var(--white);
  text-decoration: underline;
  text-decoration-color: rgba(201, 162, 77, 0.7);
  text-underline-offset: 4px;
}

.contact-qr-card {
  display: grid;
  justify-items: center;
  padding: 20px;
  color: var(--ink);
  background: var(--paper);
  text-align: center;
}

.contact-qr-card h3 {
  margin-bottom: 10px;
  font-size: 18px;
}

.contact-qr-card p {
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 13px;
}

.contact-qr-card img {
  width: 180px;
  height: 180px;
  aspect-ratio: 1;
  object-fit: contain;
  background: #fff;
}

.contact-qr-card small {
  margin-top: 9px;
  color: var(--muted);
}

.compliance {
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.footer {
  padding: 24px 0;
  color: rgba(255, 250, 240, 0.72);
  background: #0b0b0b;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 18px;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
}

.footer-qr {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 12px;
}

.footer-qr img {
  width: 108px;
  height: 108px;
  object-fit: contain;
  background: #fff;
}

.footer-qr span,
.footer-qr strong,
.footer-qr small {
  display: block;
}

.footer-qr strong {
  color: var(--white);
}

.admin-entry {
  color: rgba(255, 250, 240, 0.42);
  font-size: 12px;
  text-decoration-color: rgba(255, 250, 240, 0.22);
}

.footer-qr small {
  margin-top: 4px;
  color: rgba(255, 250, 240, 0.58);
}

@media (max-width: 980px) {
  .anchor-target {
    scroll-margin-top: 104px;
  }

  #contact.anchor-target {
    scroll-margin-top: 148px;
  }

  .menu-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    top: 75px;
    left: 18px;
    right: 18px;
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    background: rgba(10, 10, 10, 0.96);
    border: 1px solid rgba(201, 162, 77, 0.28);
  }

  .nav.open {
    display: grid;
  }

  .nav a {
    padding: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .hero-content,
  .split,
  .split.reverse,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .hero-mark {
    max-width: 480px;
  }

  .contact-qr-card {
    justify-self: start;
    width: min(100%, 360px);
  }

  .question-grid,
  .case-grid,
  .updates-list,
  .rings {
    grid-template-columns: 1fr 1fr;
  }

}

@media (max-width: 640px) {
  .brand span {
    display: none;
  }

  .hero-actions,
  .contact-actions {
    display: grid;
  }

  .question-grid,
  .case-grid,
  .updates-list,
  .rings {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    display: grid;
  }

  .contact-qr-card {
    justify-self: stretch;
    width: 100%;
  }

  .contact-qr-card img {
    width: 168px;
    height: 168px;
  }

  .footer-meta {
    display: grid;
  }

  .footer-qr {
    margin-top: 8px;
  }
}

/* Homepage V1.1 */
.section-lead {
  max-width: 820px;
  color: var(--muted);
  font-size: 18px;
}

.english-name {
  color: var(--gold-deep);
  font-size: 14px;
  font-weight: 800;
}

.independence-note,
.research-boundary,
.short-compliance {
  padding: 16px 18px;
  border-left: 3px solid var(--gold);
  background: rgba(201, 162, 77, 0.08);
  color: var(--muted);
  font-size: 14px;
}

.method .section-lead,
.dark .section-lead {
  color: rgba(255, 250, 240, 0.72);
}

.evidence-block {
  margin-top: 74px;
  padding-top: 62px;
  border-top: 1px solid rgba(201, 162, 77, 0.24);
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.evidence-grid article {
  min-height: 150px;
  padding: 24px 20px;
  border: 1px solid rgba(201, 162, 77, 0.28);
  background: rgba(255, 255, 255, 0.05);
}

.evidence-grid strong,
.evidence-grid span {
  display: block;
}

.evidence-grid strong {
  margin-bottom: 12px;
  color: var(--gold);
  font-size: 20px;
}

.evidence-grid span {
  color: rgba(255, 250, 240, 0.76);
}

.service-entry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.service-entry-grid article {
  display: flex;
  min-height: 520px;
  flex-direction: column;
  padding: 30px;
  border: 1px solid rgba(23, 23, 23, 0.12);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 10px 34px rgba(23, 23, 23, 0.07);
}

.service-entry-grid dl {
  margin: 10px 0 20px;
}

.service-entry-grid dt {
  margin-top: 16px;
  color: var(--gold-deep);
  font-size: 13px;
  font-weight: 900;
}

.service-entry-grid dd {
  margin: 4px 0 0;
  color: var(--muted);
}

.service-entry-grid .text-link {
  margin-top: auto;
  align-self: flex-start;
}

.service-audiences {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 22px;
}

.service-audiences span {
  padding: 12px;
  color: var(--white);
  background: var(--black);
  border-bottom: 3px solid var(--gold);
  text-align: center;
}

.short-compliance {
  margin-top: 24px;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.process-grid article {
  min-height: 210px;
  padding: 24px 20px;
  border: 1px solid rgba(23, 23, 23, 0.12);
  background: rgba(255, 255, 255, 0.62);
}

.process-grid article > span {
  color: var(--gold-deep);
  font-weight: 900;
}

.process-grid h3 {
  margin: 16px 0 10px;
  font-size: 20px;
}

.process-grid p {
  color: var(--muted);
  font-size: 14px;
}

.comparison-table {
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.comparison-row {
  display: grid;
  grid-template-columns: 0.72fr 1fr 1.45fr;
}

.comparison-row > * {
  min-width: 0;
  padding: 18px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.comparison-row.header {
  color: var(--white);
  background: var(--black);
  font-weight: 900;
}

.comparison-row:not(.header):nth-child(odd) {
  background: var(--soft);
}

.comparison-row:not(.header) span:last-child {
  color: var(--gold-deep);
  font-weight: 800;
}

.comparison-conclusion {
  margin: 26px 0 0;
  padding: 20px 22px;
  color: var(--white);
  background: var(--black);
  border-left: 4px solid var(--gold);
  font-weight: 800;
}

.research-layout {
  display: block;
}

.research-intro {
  max-width: 900px;
}

.research-results {
  margin-top: 64px;
  padding-top: 54px;
  border-top: 1px solid rgba(23, 23, 23, 0.14);
}

.research-lead {
  max-width: 940px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: 17px;
}

.research-list {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.research-list article {
  min-height: 250px;
}

.research-list strong {
  margin-bottom: 12px;
  font-size: 18px;
  line-height: 1.45;
}

.research-list span {
  color: var(--muted);
  font-size: 14px;
}

.research-meta {
  display: grid;
  gap: 7px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.research-meta small {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}

.research-meta b {
  display: inline-block;
  min-width: 62px;
  margin-right: 7px;
  color: var(--gold-deep);
}

.download-btn {
  width: fit-content;
  margin-top: 16px;
  padding: 10px 14px;
  font-size: 13px;
}

.download-note {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}

.research-conclusion {
  margin: 24px 0 0;
  padding: 18px 20px;
  color: var(--ink);
  border-left: 3px solid var(--gold);
  background: rgba(201, 162, 77, 0.08);
  font-weight: 800;
}

.research {
  padding-bottom: 8px;
}

.research + .updates {
  padding-top: 8px;
}

.research .eyebrow {
  max-width: 100%;
  font-size: 12px;
  line-height: 1.5;
}

.research-boundary {
  margin-top: 20px;
}

.case-grid {
  grid-template-columns: repeat(3, 1fr);
  align-items: start;
}

.case-grid article {
  position: relative;
  display: flex;
  min-height: 250px;
  flex-direction: column;
}

.case-grid p {
  color: var(--muted);
  font-size: 14px;
}

.case-core-view {
  margin-bottom: 22px;
  padding-left: 12px;
  border-left: 2px solid var(--gold);
  color: var(--ink) !important;
  font-weight: 700;
}

.case-details {
  margin-top: auto;
  border-top: 1px solid var(--line);
}

.case-details summary {
  padding: 14px 0 0;
  color: var(--gold-deep);
  cursor: pointer;
  font-size: 13px;
  font-weight: 900;
}

.case-details summary::marker {
  color: var(--gold);
}

.case-details[open] summary {
  margin-bottom: 18px;
}

.case-detail-content {
  display: grid;
  gap: 16px;
}

.case-detail-row {
  padding-top: 14px;
  border-top: 1px solid rgba(23, 23, 23, 0.08);
}

.case-detail-row:first-child {
  padding-top: 0;
  border-top: 0;
}

.case-detail-row strong {
  display: block;
  margin-bottom: 5px;
  color: var(--gold-deep);
  font-size: 12px;
}

.case-detail-row p {
  margin: 0;
  line-height: 1.75;
}

.case-conclusion {
  margin: 26px 0 0;
  padding: 18px 20px;
  color: var(--white);
  border-left: 3px solid var(--gold);
  background: var(--black);
  font-weight: 800;
}

.resource-groups {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.resource-subtitle {
  margin: 26px 0 12px;
  color: var(--white);
  font-size: 17px;
}

.public-downloads article,
.resource-groups article {
  padding: 18px;
  border: 1px solid rgba(201, 162, 77, 0.3);
  background: rgba(255, 255, 255, 0.05);
}

.public-downloads strong,
.public-downloads span,
.resource-groups strong,
.resource-groups span {
  display: block;
}

.public-downloads strong,
.resource-groups strong {
  margin-bottom: 8px;
  color: var(--gold);
}

.public-downloads span,
.resource-groups span {
  color: rgba(255, 250, 240, 0.74);
  font-size: 14px;
}

.public-downloads .download-btn,
.resource-groups .download-btn {
  color: var(--white);
  border-color: rgba(201, 162, 77, 0.55);
}

.resource-note {
  margin: 16px 0 0;
  color: rgba(255, 250, 240, 0.7);
  font-size: 13px;
  line-height: 1.7;
}

.footer-note {
  margin-top: 16px;
}

.content-notice {
  position: fixed;
  z-index: 30;
  right: 18px;
  bottom: 18px;
  max-width: min(420px, calc(100% - 36px));
  margin: 0;
  padding: 12px 16px;
  color: var(--white);
  border-left: 3px solid var(--gold);
  background: rgba(23, 23, 23, 0.94);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.24);
  font-size: 13px;
}

.content-notice[hidden] {
  display: none;
}

.footer-inner {
  align-items: center;
  flex-wrap: wrap;
  font-size: 13px;
}

@media (max-width: 1100px) {
  .service-entry-grid,
  .evidence-grid {
    grid-template-columns: 1fr 1fr;
  }

  .service-entry-grid article {
    min-height: 470px;
  }

  .research-list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 980px) {
  .process-grid {
    grid-template-columns: 1fr 1fr;
  }

  .comparison-row {
    grid-template-columns: 0.75fr 1fr 1.3fr;
  }
}

@media (max-width: 640px) {
  .section-lead {
    font-size: 16px;
  }

  .service-entry-grid,
  .evidence-grid,
  .process-grid,
  .service-audiences,
  .research-list,
  .case-grid {
    grid-template-columns: 1fr;
  }

  .service-entry-grid article {
    min-height: 0;
  }

  .download-btn {
    max-width: 100%;
    white-space: normal;
  }

  .comparison-table {
    border: 0;
  }

  .comparison-row,
  .comparison-row.header {
    display: grid;
    grid-template-columns: 1fr;
    margin-bottom: 14px;
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
  }

  .comparison-row.header {
    display: none;
  }

  .comparison-row strong {
    color: var(--white);
    background: var(--black);
  }

  .comparison-row span::before {
    display: block;
    margin-bottom: 4px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 800;
  }

  .comparison-row span:nth-child(2)::before {
    content: "通常关注";
  }

  .comparison-row span:nth-child(3)::before {
    content: "黑石产融结构关注";
  }

  h1 {
    font-size: 46px;
  }

  h2 {
    font-size: 30px;
  }

  .lead-form select,
  .lead-form input,
  .lead-form textarea {
    min-width: 0;
    font-size: 16px;
  }
}

@media (max-width: 360px) {
  h1 {
    font-size: 40px;
  }

  h2 {
    font-size: 28px;
  }

  .btn {
    width: 100%;
    padding-inline: 14px;
  }
}