:root {
  --rp-bg: #f2f7fb;
  --rp-surface: #fff;
  --rp-text: #1a2a3a;
  --rp-muted: #5e7083;
  --rp-border: #dce8f2;
  --rp-blue: #176fb8;
  --rp-deep: #0e4c82;
  --rp-accent: #17a099;
  --rp-soft: #e9f5f4;
  --rp-shadow: 0 16px 42px rgba(20, 72, 112, 0.1);
}

html { scroll-behavior: smooth; }

body {
  background: var(--rp-bg) !important;
  color: var(--rp-text);
  font-family: "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif !important;
}

.research-page {
  background: transparent !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  box-sizing: border-box;
  margin: 0 auto !important;
  max-width: 1480px !important;
  padding: 2rem clamp(1rem, 3vw, 3rem) 5rem !important;
}

.research-hero {
  --hero-end: #159d96;
  align-items: center;
  background:
    radial-gradient(circle at 91% 12%, rgba(255, 255, 255, 0.17) 0 8rem, transparent 8.1rem),
    linear-gradient(120deg, #0e4c82 0%, #176fb8 58%, var(--hero-end) 125%);
  border-radius: 1.2rem;
  box-shadow: var(--rp-shadow);
  color: #fff;
  display: flex;
  box-sizing: border-box;
  height: 12.5rem;
  justify-content: space-between;
  min-height: 0;
  overflow: hidden;
  padding: clamp(1.75rem, 3vw, 2.8rem) clamp(2.25rem, 5vw, 4.75rem);
  position: relative;
}

.research-hero--two { --hero-end: #4b79d8; }
.research-hero--three { --hero-end: #7866c9; }
.research-hero--four { --hero-end: #168caa; }
.research-hero--platform { --hero-end: #d18c32; }

.research-hero__eyebrow {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  margin: 0 0 0.8rem;
  opacity: 0.76;
}

.research-hero h1 {
  color: #fff !important;
  margin: 0 !important;
}

.research-hero h1 span,
.research-hero h1 strong {
  display: block;
}

.research-hero h1 span {
  font-size: clamp(1.1rem, 2vw, 1.45rem);
  font-weight: 600;
  letter-spacing: 0.08em;
  opacity: 0.82;
}

.research-hero h1 strong {
  font-size: clamp(2rem, 3.5vw, 3.25rem);
  line-height: 1.2;
  margin-top: 0.35rem;
}

.research-hero__number {
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 50%;
  display: flex;
  flex: 0 0 auto;
  font-size: clamp(2.3rem, 5vw, 4.7rem);
  font-weight: 900;
  height: clamp(6rem, 11vw, 9rem);
  justify-content: center;
  letter-spacing: -0.06em;
  margin-left: 2rem;
  opacity: 0.72;
  width: clamp(6rem, 11vw, 9rem);
}

.research-page__jump {
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--rp-border);
  border-radius: 0.85rem;
  box-shadow: 0 8px 24px rgba(20, 72, 112, 0.06);
  display: flex;
  gap: 0.4rem;
  margin: 1rem 0 1.5rem;
  overflow-x: auto;
  padding: 0.55rem;
  scrollbar-width: thin;
}

.research-page__jump a {
  border-radius: 0.55rem;
  color: var(--rp-deep);
  flex: 0 0 auto;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.55rem 0.8rem;
  text-decoration: none;
}

.research-page__jump a:hover {
  background: #eaf4fb;
  color: var(--rp-blue);
}

.research-section {
  display: grid;
  gap: 1.35rem;
  scroll-margin-top: 1rem;
}

.research-section + .research-section { margin-top: 2rem; }

.research-section__heading {
  align-items: end;
  background: linear-gradient(135deg, #f3f9fd, #effaf8);
  border: 1px solid var(--rp-border);
  border-radius: 1rem;
  display: flex;
  justify-content: space-between;
  padding: 1.35rem 1.6rem;
}

.research-section__heading p,
.platform-conclusion > p {
  color: var(--rp-accent);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  margin: 0;
}

.research-section__heading h2,
.platform-conclusion h2 {
  color: var(--rp-deep);
  font-size: clamp(1.55rem, 2.5vw, 2.15rem);
  margin: 0;
}

.research-chapter {
  align-items: start;
  background: var(--rp-surface);
  border: 1px solid rgba(220, 232, 242, 0.9);
  border-radius: 1.1rem;
  box-shadow: var(--rp-shadow);
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.8rem);
  grid-template-columns: minmax(20rem, 0.82fr) minmax(0, 1.18fr);
  padding: clamp(1.35rem, 3vw, 2.5rem);
  scroll-margin-top: 1rem;
}

.research-chapter--reverse .research-chapter__copy { order: 2; }
.research-chapter--reverse .research-media { order: 1; }
.research-chapter--text-only { grid-template-columns: 1fr; }

.research-chapter__index {
  align-items: center;
  background: linear-gradient(135deg, var(--rp-blue), var(--rp-accent));
  border-radius: 0.55rem;
  color: #fff;
  display: inline-flex;
  font-size: 0.72rem;
  font-weight: 900;
  height: 2rem;
  justify-content: center;
  letter-spacing: 0.08em;
  width: 2.6rem;
}

.research-chapter h3 {
  color: var(--rp-deep);
  font-size: clamp(1.3rem, 2vw, 1.8rem);
  line-height: 1.4;
  margin: 0.85rem 0 1rem;
}

.research-chapter__copy p {
  color: #354a5e;
  font-size: 0.96rem;
  line-height: 2;
  margin: 0;
  text-align: justify;
}

.research-chapter__copy p + p { margin-top: 0.9rem; }

.research-media {
  align-self: stretch;
  background: linear-gradient(145deg, #edf5fb, #f2faf9);
  border: 1px solid var(--rp-border);
  border-radius: 0.9rem;
  display: grid;
  gap: 0.8rem;
  overflow: hidden;
  padding: 0.85rem;
}

.research-media figure {
  align-content: center;
  background: #fff;
  border-radius: 0.65rem;
  display: grid;
  margin: 0;
  min-width: 0;
  overflow: hidden;
}

.research-media img {
  display: block;
  height: auto;
  max-height: 34rem;
  object-fit: contain;
  width: 100%;
}

.research-media figcaption {
  color: var(--rp-muted);
  font-size: 0.72rem;
  line-height: 1.5;
  padding: 0.55rem 0.6rem 0.65rem;
  text-align: center;
}

.research-media--three {
  grid-template-columns: minmax(0, 2fr) minmax(10rem, 0.75fr);
}

.research-media--three figure:first-child { grid-column: 1 / -1; }
.research-media--three figure:nth-child(2) { grid-column: 1; }
.research-media--three figure:nth-child(3) { grid-column: 2; }
.research-media--stack { grid-template-columns: 1fr; }

.platform-conclusion {
  background:
    radial-gradient(circle at 90% 10%, rgba(255, 255, 255, 0.16) 0 7rem, transparent 7.1rem),
    linear-gradient(120deg, #0e4c82, #176fb8 60%, #159d96 130%);
  border-radius: 1.1rem;
  box-shadow: var(--rp-shadow);
  color: #fff;
  margin-top: 2rem;
  padding: clamp(1.7rem, 4vw, 3rem);
  scroll-margin-top: 1rem;
}

.platform-conclusion > p { color: #aee9e4; }
.platform-conclusion h2 { color: #fff; margin-top: 0.25rem; }

.platform-conclusion div {
  font-size: 1rem;
  line-height: 2;
  margin-top: 1rem;
  max-width: 72rem;
  opacity: 0.92;
}

@media (max-width: 1050px) {
  .research-chapter { grid-template-columns: 1fr; }
  .research-chapter--reverse .research-chapter__copy,
  .research-chapter--reverse .research-media { order: initial; }
}

@media (max-width: 720px) {
  .research-page { padding: 1rem 0.75rem 3rem !important; }
  .research-hero { border-radius: 0.9rem; height: auto; min-height: 10rem; padding: 2rem 1.25rem; }
  .research-hero__number { height: 4.5rem; margin-left: 1rem; width: 4.5rem; }
  .research-chapter { border-radius: 0.9rem; padding: 1.2rem; }
  .research-chapter__copy p { font-size: 0.92rem; text-align: left; }
  .research-media--three { grid-template-columns: 1fr; }
  .research-media--three figure:first-child,
  .research-media--three figure:nth-child(2),
  .research-media--three figure:nth-child(3) { grid-column: 1; }
  .research-section__heading { align-items: flex-start; flex-direction: column; gap: 0.3rem; }
}

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