:root {
  --ink: #17212b;
  --muted: #64707d;
  --paper: #f4f7f8;
  --surface: #ffffff;
  --teal: #00a383;
  --coral: #f08a4b;
  --blue: #3157d5;
  --line: rgba(23, 33, 43, 0.14);
  --shadow: 0 18px 45px rgba(18, 35, 48, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}

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

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 5vw, 64px);
  color: #fff;
  background: linear-gradient(180deg, rgba(12, 19, 25, 0.72), rgba(12, 19, 25, 0));
}

.brand,
.nav-links {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.16);
}

.nav-links {
  gap: clamp(12px, 3vw, 28px);
  font-size: 14px;
}

.nav-links a {
  opacity: 0.86;
}

.nav-links a:hover {
  opacity: 1;
}

.hero {
  position: relative;
  min-height: 88vh;
  overflow: hidden;
  color: #fff;
}

.hero-carousel,
.hero-slide,
.hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-carousel {
  overflow: hidden;
}

.hero-slide {
  object-fit: cover;
  opacity: 0;
  transform: scale(1.04);
  transition: opacity 1200ms ease, transform 7200ms ease;
}

.hero-slide.active {
  opacity: 1;
  transform: scale(1);
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(5, 11, 18, 0.88) 0%, rgba(7, 20, 28, 0.64) 45%, rgba(8, 15, 20, 0.2) 100%),
    radial-gradient(circle at 78% 30%, rgba(240, 138, 75, 0.26), transparent 32%),
    linear-gradient(0deg, rgba(8, 15, 20, 0.48), rgba(8, 15, 20, 0.04) 42%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(760px, calc(100% - 36px));
  padding: 24vh 0 18vh;
  margin-left: clamp(18px, 7vw, 92px);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--coral);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #f7b08d;
}

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

h1 {
  max-width: 720px;
  margin-bottom: 22px;
  font-size: clamp(42px, 8vw, 86px);
  line-height: 1.06;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.16;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 22px;
  line-height: 1.25;
}

.hero-copy {
  max-width: 600px;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions,
.hero-dots,
.toolbar,
.filters {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-dots {
  margin-top: 34px;
}

.hero-dot {
  width: 42px;
  height: 4px;
  border: 0;
  border-radius: 999px;
  padding: 0;
  background: rgba(255, 255, 255, 0.34);
  cursor: pointer;
}

.hero-dot.active {
  background: #f08a4b;
}

.button,
.filter {
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 11px 18px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.button.primary {
  color: #fff;
  background: var(--teal);
}

.button.ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.12);
}

.section {
  padding: clamp(54px, 8vw, 96px) clamp(18px, 5vw, 64px);
}

.intro-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  padding-top: 0;
  background: var(--ink);
}

.metric {
  min-height: 128px;
  padding: 28px;
  color: #fff;
  background: #243242;
}

.metric:nth-child(2) {
  background: #8a5a05;
}

.metric:nth-child(3) {
  background: #123d68;
}

.metric strong {
  display: block;
  margin-bottom: 6px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1;
}

.metric span {
  color: rgba(255, 255, 255, 0.78);
}

.split {
  display: grid;
  grid-template-columns: minmax(190px, 0.34fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 76px);
}

.section-heading {
  align-self: start;
}

.toolbar {
  grid-column: 2;
  justify-content: space-between;
  margin-bottom: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.search {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: min(100%, 320px);
}

.search span,
.subscribe span {
  font-size: 13px;
  font-weight: 800;
  color: var(--muted);
}

input {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.72);
  font: inherit;
}

.filter {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.5);
  border-color: var(--line);
}

.filter.active {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
}

.post-grid {
  grid-column: 2;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.post-card {
  min-height: 250px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 10px 28px rgba(23, 33, 43, 0.06);
}

.post-card.featured {
  background: #102347;
  color: #fff;
  box-shadow: var(--shadow);
}

.post-card.hidden {
  display: none;
}

.post-meta {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.featured .post-meta,
.featured p {
  color: rgba(255, 255, 255, 0.72);
}

.post-card p {
  color: var(--muted);
}

.post-card a {
  display: inline-block;
  margin-top: 10px;
  color: var(--teal);
  font-weight: 800;
}

.featured a {
  color: #f7b08d;
}

.notes {
  background: #101720;
  color: #fff;
}

.note-list {
  display: grid;
  gap: 1px;
  background: rgba(255, 255, 255, 0.2);
}

.note-list p {
  margin: 0;
  padding: 22px 0;
  background: #17212b;
}

.note-list time {
  display: inline-block;
  width: 72px;
  color: #f7b08d;
  font-weight: 800;
}

.about,
.contact {
  display: grid;
  grid-template-columns: minmax(220px, 0.45fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 80px);
}

.about-copy {
  max-width: 760px;
  color: #3d4854;
  font-size: 19px;
}

.contact {
  align-items: center;
  background: #dbe8e5;
}

.subscribe {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: end;
}

.subscribe label {
  display: grid;
  gap: 8px;
}

#formMessage {
  grid-column: 1 / -1;
  min-height: 26px;
  margin: 0;
  color: var(--teal);
  font-weight: 800;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(18px, 5vw, 64px);
  color: rgba(255, 255, 255, 0.74);
  background: #111922;
}

@media (max-width: 820px) {
  .site-header {
    position: absolute;
    align-items: flex-start;
  }

  .nav-links {
    justify-content: flex-end;
    flex-wrap: wrap;
  }

  .hero {
    min-height: 760px;
  }

  .hero-content {
    padding-top: 176px;
    margin-left: 18px;
  }

  .intro-band,
  .vision,
  .vision-grid,
  .split,
  .post-grid,
  .about,
  .contact,
  .subscribe {
    grid-template-columns: 1fr;
  }

  .toolbar,
  .post-grid {
    grid-column: 1;
  }
}

@media (max-width: 560px) {
  .site-header {
    display: grid;
  }

  .hero {
    min-height: 720px;
  }

  .hero-actions .button,
  .search,
  .filters,
  .filter {
    width: 100%;
  }

  .filters {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
  }

  .button,
  .filter {
    text-align: center;
  }

  .site-footer {
    display: grid;
  }
}
.vision {
  display: grid;
  grid-template-columns: minmax(220px, 0.36fr) minmax(0, 1fr);
  gap: clamp(28px, 5vw, 76px);
  background: #ffffff;
}

.vision-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.vision-card {
  min-height: 320px;
  padding: clamp(24px, 4vw, 38px);
  border-radius: 8px;
  color: #fff;
  box-shadow: var(--shadow);
}

.ai-card {
  background:
    linear-gradient(145deg, rgba(49, 87, 213, 0.94), rgba(0, 163, 131, 0.82)),
    #3157d5;
}

.btc-card {
  background:
    linear-gradient(145deg, rgba(18, 33, 43, 0.94), rgba(240, 138, 75, 0.88)),
    #17212b;
}

.vision-kicker {
  display: inline-block;
  margin-bottom: 72px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.vision-card p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
}

@media (max-width: 820px) {
  .vision,
  .vision-grid {
    grid-template-columns: 1fr;
  }
}