:root {
  --navy: #071426;
  --blue: #0b2748;
  --blue-2: #123b62;
  --gold: #d7b46a;
  --gold-2: #f0d48b;
  --gray: #a8b2bf;
  --soft: #f5f7fa;
  --ink: #152033;
  --line: rgba(215, 180, 106, 0.22);
  --shadow: 0 24px 70px rgba(5, 15, 31, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.75;
}

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

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

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

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 16px 5vw;
  color: #fff;
  background: rgba(7, 20, 38, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
}

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

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: #071426;
  font-weight: 800;
  background: linear-gradient(135deg, var(--gold-2), var(--gold));
  border-radius: 50%;
  box-shadow: 0 0 24px rgba(215, 180, 106, 0.34);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 18px;
  line-height: 1.2;
}

.brand small {
  color: rgba(255, 255, 255, 0.62);
  font-size: 10px;
  letter-spacing: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
}

.site-nav a:hover {
  color: var(--gold-2);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: #fff;
}

.hero {
  position: relative;
  min-height: 92vh;
  padding: 180px 5vw 72px;
  overflow: hidden;
  color: #fff;
  background: var(--navy);
}

.hero-bg,
.hero-overlay,
.hero-pattern {
  position: absolute;
  inset: 0;
}

.hero-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(7, 20, 38, 0.95), rgba(7, 20, 38, 0.72) 46%, rgba(7, 20, 38, 0.28)),
    linear-gradient(0deg, rgba(7, 20, 38, 0.92), transparent 44%);
}

.hero-pattern {
  opacity: 0.4;
  background-image:
    linear-gradient(115deg, transparent 0 48%, rgba(215, 180, 106, 0.16) 48% 49%, transparent 49%),
    radial-gradient(circle at 78% 28%, rgba(215, 180, 106, 0.22), transparent 24%);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(760px, 100%);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
}

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

h1 {
  margin-bottom: 14px;
  font-size: clamp(46px, 8vw, 86px);
  line-height: 1.05;
  font-weight: 800;
}

h2 {
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.22;
}

h3 {
  font-size: 22px;
  line-height: 1.35;
}

.slogan {
  color: var(--gold-2);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 700;
}

.hero-copy {
  max-width: 650px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 19px;
}

.hero-actions,
.carousel-controls {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.btn:hover,
.carousel-btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #071426;
  background: linear-gradient(135deg, var(--gold-2), var(--gold));
  font-weight: 700;
}

.btn-secondary {
  color: #fff;
  border-color: rgba(215, 180, 106, 0.55);
  background: rgba(255, 255, 255, 0.06);
}

.hero-metrics {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  width: min(760px, 100%);
  margin-top: 84px;
  border: 1px solid rgba(215, 180, 106, 0.25);
  background: rgba(7, 20, 38, 0.52);
  backdrop-filter: blur(18px);
}

.hero-metrics div {
  padding: 22px;
  border-right: 1px solid rgba(215, 180, 106, 0.18);
}

.hero-metrics div:last-child {
  border-right: 0;
}

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

.hero-metrics strong {
  color: var(--gold-2);
  font-size: 26px;
}

.hero-metrics span {
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
}

.section,
.leader-carousel {
  padding: 92px 0;
}

.leader-carousel {
  color: #fff;
  background: linear-gradient(180deg, #071426, #0b2748);
}

.carousel-head,
.section-head,
.two-col,
.contact-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 48px;
  align-items: end;
  margin-bottom: 42px;
}

.carousel-head {
  grid-template-columns: 1fr auto;
}

.carousel-btn {
  width: 44px;
  height: 44px;
  color: var(--gold-2);
  font-size: 30px;
  line-height: 1;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(215, 180, 106, 0.35);
  border-radius: 50%;
  cursor: pointer;
}

.carousel-shell {
  overflow: hidden;
}

.carousel-track {
  display: flex;
  gap: 22px;
  overflow-x: auto;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  padding-bottom: 10px;
}

.carousel-track::-webkit-scrollbar {
  height: 8px;
}

.carousel-track::-webkit-scrollbar-thumb {
  background: rgba(215, 180, 106, 0.42);
  border-radius: 99px;
}

.leader-slide {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 32px;
  flex: 0 0 min(920px, 92%);
  min-height: 430px;
  padding: 24px;
  scroll-snap-align: start;
  border: 1px solid rgba(215, 180, 106, 0.24);
  background: rgba(255, 255, 255, 0.055);
  box-shadow: var(--shadow);
}

.leader-slide img {
  width: 100%;
  height: 100%;
  min-height: 380px;
  object-fit: cover;
  object-position: top center;
}

.leader-info {
  align-self: center;
}

.leader-info span,
.feature-card span,
.member-card span,
.news-card span {
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
}

.leader-info h3 {
  margin: 6px 0 16px;
  color: #fff;
  font-size: 30px;
}

.leader-info p {
  color: rgba(255, 255, 255, 0.74);
}

.intro,
.news-section {
  background: var(--soft);
}

.intro-copy {
  color: #4d5a6b;
}

.wide-copy {
  width: min(860px, 100%);
  margin-bottom: 34px;
}

.wide-copy p {
  color: #546174;
}

.advantage-grid,
.business-grid,
.member-grid,
.news-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.business-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

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

.feature-card,
.business-card,
.member-card,
.news-card,
.private-project,
.join-form {
  padding: 26px;
  border: 1px solid rgba(10, 39, 72, 0.1);
  background: #fff;
  box-shadow: 0 14px 34px rgba(9, 31, 57, 0.08);
}

.feature-card,
.business-card,
.member-card,
.news-card {
  min-height: 210px;
}

.feature-card p,
.business-card p,
.member-card p,
.news-card p,
.notice {
  color: #5d6878;
}

.business-card {
  border-top: 3px solid var(--gold);
}

.private-project {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 26px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--navy));
  border-color: var(--line);
}

.member-section {
  color: #fff;
  background: var(--navy);
}

.member-card {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(215, 180, 106, 0.22);
}

.member-card.featured {
  background: linear-gradient(135deg, rgba(215, 180, 106, 0.24), rgba(255, 255, 255, 0.06));
}

.member-card p,
.member-section .notice {
  color: rgba(255, 255, 255, 0.7);
}

.text-link {
  padding: 0;
  color: var(--gold-2);
  background: transparent;
  border: 0;
  cursor: pointer;
}

.notice {
  margin: 28px 0 0;
  padding: 18px 22px;
  border-left: 3px solid var(--gold);
  background: rgba(255, 255, 255, 0.08);
}

.timeline {
  display: grid;
  gap: 16px;
}

.event-item {
  display: grid;
  grid-template-columns: 90px 220px 1fr;
  gap: 24px;
  align-items: center;
  padding: 22px 0;
  border-bottom: 1px solid rgba(10, 39, 72, 0.12);
}

.event-item time {
  color: var(--gold);
  font-weight: 800;
}

.advisor-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.advisor {
  margin: 0;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 14px 34px rgba(9, 31, 57, 0.08);
}

.advisor img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top center;
}

.advisor figcaption {
  padding: 14px;
  font-weight: 700;
}

.join-section,
.contact-section {
  color: #fff;
  background: linear-gradient(135deg, var(--navy), var(--blue));
}

.join-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 44px;
  align-items: start;
}

.join-copy p,
.contact-list p {
  color: rgba(255, 255, 255, 0.74);
}

.promise-list {
  padding-left: 18px;
  color: var(--gold-2);
}

.join-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(215, 180, 106, 0.22);
}

.join-form label,
.modal-panel label {
  display: grid;
  gap: 6px;
}

.join-form span,
.modal-panel span {
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
}

.join-form input,
.join-form select,
.join-form textarea,
.modal-panel input {
  width: 100%;
  padding: 12px 14px;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 4px;
  outline: none;
}

.join-form select option {
  color: #111;
}

.join-form input:focus,
.join-form select:focus,
.join-form textarea:focus,
.modal-panel input:focus {
  border-color: var(--gold);
}

.full {
  grid-column: 1 / -1;
}

.form-status {
  grid-column: 1 / -1;
  margin: 0;
  color: var(--gold-2);
}

.contact-list {
  padding: 26px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.07);
}

.site-footer {
  padding: 24px 0;
  color: rgba(255, 255, 255, 0.72);
  background: #050d18;
}

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

.footer-inner p {
  margin: 0;
}

.footer-inner a {
  margin-left: 16px;
  font-size: 14px;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  place-items: center;
  padding: 20px;
}

.modal.is-open {
  display: grid;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(4, 12, 24, 0.72);
  backdrop-filter: blur(10px);
}

.modal-panel {
  position: relative;
  width: min(520px, 100%);
  padding: 34px;
  color: #fff;
  background: linear-gradient(145deg, var(--navy), var(--blue));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 34px;
  height: 34px;
  color: #fff;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  cursor: pointer;
}

.secure-result {
  margin-top: 16px;
  color: var(--gold-2);
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .site-nav {
    gap: 14px;
    font-size: 13px;
  }

  .business-grid,
  .advantage-grid,
  .member-grid,
  .news-grid,
  .advisor-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .site-header {
    padding: 12px 20px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    top: 67px;
    left: 0;
    display: none;
    width: 100%;
    padding: 18px 20px 24px;
    background: rgba(7, 20, 38, 0.98);
    border-bottom: 1px solid var(--line);
  }

  .site-nav.is-open {
    display: grid;
  }

  .hero {
    min-height: 860px;
    padding-top: 132px;
  }

  .hero-overlay {
    background: linear-gradient(180deg, rgba(7, 20, 38, 0.92), rgba(7, 20, 38, 0.64));
  }

  .hero-metrics,
  .carousel-head,
  .section-head,
  .two-col,
  .contact-layout,
  .join-layout {
    grid-template-columns: 1fr;
  }

  .hero-metrics {
    margin-top: 58px;
  }

  .leader-slide {
    grid-template-columns: 1fr;
    flex-basis: 88%;
    min-height: 0;
  }

  .leader-slide img {
    height: 390px;
    min-height: 0;
  }

  .event-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 28px, 1180px);
  }

  .brand strong {
    font-size: 15px;
  }

  .brand small {
    display: none;
  }

  .hero {
    min-height: 780px;
    padding-left: 20px;
    padding-right: 20px;
  }

  h1 {
    font-size: 44px;
  }

  h2 {
    font-size: 28px;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .hero-metrics div {
    border-right: 0;
    border-bottom: 1px solid rgba(215, 180, 106, 0.18);
  }

  .section,
  .leader-carousel {
    padding: 64px 0;
  }

  .business-grid,
  .advantage-grid,
  .member-grid,
  .news-grid,
  .advisor-strip,
  .join-form {
    grid-template-columns: 1fr;
  }

  .private-project,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .advisor-strip {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
  }

  .advisor {
    flex: 0 0 72%;
    scroll-snap-align: start;
  }
}