:root {
  --ink: #102a43;
  --ink-soft: #334e68;
  --muted: #627d98;
  --paper: #f5f7fa;
  --line: rgba(16, 42, 67, 0.12);
  --accent: #0f9d8a;
  --accent-deep: #0b7a6b;
  --warm: #f0b429;
  --stage: #0d1b2a;
  --radius: 14px;
  --font-display: "Bricolage Grotesque", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  background: var(--paper);
  line-height: 1.65;
  overflow-x: hidden;
}

.bg-wash {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(15, 157, 138, 0.18), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(240, 180, 41, 0.16), transparent 50%),
    linear-gradient(165deg, #eef3f7 0%, #f7f4ee 45%, #e9f2f0 100%);
}

.bg-wash::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  pointer-events: none;
}

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

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92em;
  background: rgba(16, 42, 67, 0.06);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  padding: 14px 5vw;
  backdrop-filter: blur(12px);
  background: rgba(245, 247, 250, 0.78);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.top.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(245, 247, 250, 0.92);
}

.brand-mark {
  justify-self: start;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.nav {
  justify-self: center;
  display: flex;
  align-items: center;
  gap: 10px 22px;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.nav a:hover {
  color: var(--ink);
}

.nav-cta {
  justify-self: end;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff !important;
  font-size: 0.95rem;
  white-space: nowrap;
}

.hero {
  position: relative;
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: flex-end;
  padding: 0;
  overflow: hidden;
}

.hero-copy {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 760px;
  padding: 72px 5vw 80px;
}

.brand-hero {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.8rem, 7vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: #f8fafc;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.25);
  animation: rise 0.8s ease both;
}

.hero h1 {
  margin: 0 0 14px;
  max-width: 14ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.55rem, 3.2vw, 2.35rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: #e2e8f0;
  animation: rise 0.8s ease 0.08s both;
}

.lead {
  margin: 0 0 28px;
  max-width: 36ch;
  color: rgba(226, 232, 240, 0.86);
  font-size: 1.05rem;
  animation: rise 0.8s ease 0.16s both;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  animation: rise 0.8s ease 0.24s both;
}

.hero .btn.ghost {
  color: #f8fafc;
  box-shadow: inset 0 0 0 1.5px rgba(248, 250, 252, 0.35);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 0;
  border-radius: 999px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

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

.btn.primary {
  background: var(--accent);
  color: #fff;
}

.btn.primary:hover {
  background: var(--accent-deep);
}

.btn.ghost {
  background: transparent;
  color: var(--ink);
  box-shadow: inset 0 0 0 1.5px var(--line);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.hero-stage {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(13, 27, 42, 0.2) 0%, rgba(13, 27, 42, 0.72) 55%, rgba(13, 27, 42, 0.92) 100%),
    linear-gradient(140deg, rgba(15, 157, 138, 0.35), transparent 42%),
    linear-gradient(200deg, #13293d 0%, #0d1b2a 55%, #163a3a 100%);
  animation: fade 1s ease 0.1s both;
}

.hero-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.04) 50%, transparent),
    radial-gradient(circle at 70% 28%, rgba(240, 180, 41, 0.2), transparent 36%);
}

.hero-danmu {
  position: absolute;
  inset: 0 0 38% 0;
  overflow: hidden;
  pointer-events: none;
}

.danmu-item {
  position: absolute;
  left: 0;
  top: 0;
  white-space: nowrap;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(0.95rem, 1.55vw, 1.25rem);
  color: var(--c, #fff);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.55), 0 0 14px rgba(255, 255, 255, 0.12);
  transform: translate3d(100vw, 0, 0);
  animation-name: danmu-fly;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  animation-duration: var(--dur, 14s);
  animation-delay: var(--d, 0s);
  will-change: transform;
}

.section {
  padding: 72px 5vw;
  max-width: 1100px;
  margin: 0 auto;
}

.section-head {
  margin-bottom: 28px;
  max-width: 42ch;
}

.section-head h2 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.platform-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px 28px;
  border-top: 1px solid var(--line);
}

.platform-list li {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
}

.code-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.55);
}

.code-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.copy-btn {
  border: 0;
  background: transparent;
  color: var(--accent-deep);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.code {
  margin: 0;
  padding: 16px 18px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

.hint {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.subhead {
  margin: 28px 0 12px;
  font-family: var(--font-display);
  font-size: 1.15rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.5);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}

th,
td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.9rem;
}

tr:last-child td {
  border-bottom: 0;
}

.field-notes {
  margin: 16px 0 0;
  padding-left: 1.1rem;
  color: var(--ink-soft);
}

.try-section {
  padding-bottom: 96px;
}

.try-form {
  display: grid;
  gap: 14px;
  max-width: 720px;
}

.field {
  display: grid;
  gap: 6px;
}

.field span {
  font-size: 0.92rem;
  color: var(--muted);
  font-weight: 500;
}

.field input {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.75);
  font: inherit;
  color: var(--ink);
  outline: none;
}

.field input:focus {
  border-color: rgba(15, 157, 138, 0.55);
  box-shadow: 0 0 0 3px rgba(15, 157, 138, 0.12);
}

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

.check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.try-status {
  margin-top: 18px;
  color: var(--ink-soft);
}

.try-status.error {
  color: #b91c1c;
}

.try-result {
  margin-top: 18px;
  max-width: 720px;
}

.result-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin-bottom: 12px;
  font-family: var(--font-display);
  font-weight: 700;
}

.result-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  max-height: 360px;
  overflow: auto;
}

.result-list li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}

.result-list .t {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 32px;
  border-top: 1px solid var(--line);
  max-width: 720px;
}

.contact-list li {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.contact-list .lab {
  color: var(--muted);
  font-size: 0.92rem;
}

.contact-list .val {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
  word-break: break-all;
}

.contact-list a.val:hover {
  color: var(--accent-deep);
}

.contact-note {
  margin: 18px 0 0;
  max-width: 52ch;
  color: var(--ink-soft);
}

.footer {
  padding: 28px 5vw 40px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

.footer p {
  margin: 0;
  max-width: 1100px;
}

.footer-contact {
  margin-top: 8px !important;
}

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

@keyframes fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes danmu-fly {
  from {
    transform: translate3d(100vw, 0, 0);
  }
  to {
    transform: translate3d(-110%, 0, 0);
  }
}

@media (max-width: 900px) {
  .top {
    grid-template-columns: 1fr auto;
  }

  .nav {
    display: none;
  }

  .hero {
    min-height: calc(100vh - 58px);
  }

  .hero-copy {
    padding: 48px 5vw 56px;
  }

  .hero-danmu {
    inset: 0 0 48% 0;
  }

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

@media (max-width: 560px) {
  .platform-list {
    grid-template-columns: 1fr;
  }

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

  .brand-hero {
    font-size: 2.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}