:root {
  --ink: #1f272c;
  --ink-soft: #526167;
  --paper: #ece7dc;
  --paper-light: #f8f3e8;
  --paper-deep: #ddd3bf;
  --line: rgba(31, 39, 44, 0.16);
  --line-strong: rgba(31, 39, 44, 0.28);
  --blue: #426f98;
  --rust: #ba4936;
  --green: #487763;
  --gold: #c88e30;
  --shadow: 0 24px 70px rgba(31, 39, 44, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background:
    linear-gradient(rgba(31, 39, 44, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 39, 44, 0.028) 1px, transparent 1px),
    var(--paper);
  background-size: 52px 52px;
  color: var(--ink);
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.66;
}

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

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

h1,
h2,
h3 {
  line-height: 1.08;
  font-family: "Baskerville", "Songti SC", "STSong", serif;
  font-weight: 600;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 60;
  transform: translateY(-140%);
  border-radius: 6px;
  background: var(--ink);
  color: var(--paper-light);
  padding: 10px 14px;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 24px;
  color: var(--ink);
  transition: background-color 180ms ease, box-shadow 180ms ease;
}

.site-header.is-scrolled {
  background: rgba(248, 243, 232, 0.9);
  box-shadow: 0 1px 0 var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: var(--ink);
  color: var(--gold);
  font-size: 0.72rem;
}

.brand-text {
  font-size: 0.95rem;
}

.site-nav {
  display: flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(248, 243, 232, 0.76);
  backdrop-filter: blur(14px);
}

.site-nav a {
  min-width: 54px;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--ink-soft);
  text-align: center;
  font-size: 0.9rem;
  font-weight: 800;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: var(--ink);
  color: var(--paper-light);
  outline: none;
}

.hero {
  min-height: 94svh;
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(460px, 1.12fr);
  gap: 34px;
  align-items: center;
  padding: 108px 24px 46px;
}

.hero-copy-block {
  max-width: 780px;
}

.eyebrow {
  margin-bottom: 14px;
  color: var(--rust);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  margin-bottom: 20px;
  font-size: clamp(4.8rem, 12vw, 10.5rem);
}

.hero-lede {
  max-width: 720px;
  margin-bottom: 28px;
  color: var(--ink);
  font-size: clamp(1.26rem, 2.25vw, 1.82rem);
  font-weight: 700;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: rgba(248, 243, 232, 0.58);
  color: var(--ink);
  padding: 10px 16px;
  font-weight: 900;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  border-color: var(--ink);
  background: var(--paper-light);
  outline: none;
}

.button-primary {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper-light);
}

.hero-visual {
  margin-bottom: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: var(--paper-light);
  box-shadow: var(--shadow);
}

.hero-visual img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.quick-facts {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--line);
  box-shadow: var(--shadow);
}

.quick-facts div {
  min-height: 116px;
  padding: 20px;
  background: rgba(248, 243, 232, 0.8);
}

.quick-facts span,
.card-topline span,
.proof-grid span,
.method-row span {
  display: block;
  margin-bottom: 8px;
  color: var(--rust);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.quick-facts strong {
  font-size: 1.08rem;
}

.section {
  padding: 86px 24px;
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 940px;
  margin-bottom: 38px;
}

.section-head h2,
.contact-section h2 {
  margin-bottom: 16px;
  font-size: clamp(2.25rem, 5.6vw, 5.2rem);
}

.section-head p,
.profile-grid p,
.channel-card p,
.proof-grid p,
.method-row p,
.contact-section p {
  color: var(--ink-soft);
  font-size: 1.03rem;
}

.profile-section,
.proof-section {
  background: var(--paper-light);
}

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

.profile-grid article {
  min-height: 250px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  padding: 24px;
}

.profile-grid h3,
.proof-grid h3,
.method-row h3 {
  margin-bottom: 12px;
  font-size: 1.55rem;
}

.channels-section {
  background: var(--paper);
}

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

.channel-card {
  min-height: 560px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(248, 243, 232, 0.76);
  padding: 24px;
  box-shadow: var(--shadow);
}

.card-topline {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 46px;
}

.card-topline strong {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.channel-card h3 {
  margin-bottom: 18px;
  font-size: clamp(1.82rem, 3vw, 2.7rem);
}

.channel-card dl {
  margin-bottom: 0;
  margin-top: auto;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.channel-card dt {
  margin-bottom: 4px;
  color: var(--rust);
  font-size: 0.78rem;
  font-weight: 900;
}

.channel-card dd {
  margin-left: 0;
  margin-bottom: 16px;
  color: var(--ink);
  font-weight: 800;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--line);
}

.proof-grid article {
  min-height: 255px;
  padding: 22px;
  background: var(--paper-light);
}

.method-section {
  background:
    linear-gradient(90deg, rgba(31, 39, 44, 0.08), transparent 38%),
    var(--paper);
}

.method-list {
  border-top: 1px solid var(--line-strong);
}

.method-row {
  display: grid;
  grid-template-columns: 90px minmax(220px, 0.35fr) minmax(0, 1fr);
  gap: 24px;
  align-items: baseline;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.method-row h3,
.method-row p {
  margin-bottom: 0;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 36px;
  align-items: center;
  padding: 86px 24px;
  background: var(--ink);
  color: var(--paper-light);
}

.contact-section p {
  max-width: 760px;
  color: rgba(248, 243, 232, 0.72);
}

.contact-section .button {
  border-color: rgba(248, 243, 232, 0.38);
  background: transparent;
  color: var(--paper-light);
}

.contact-section .button-primary {
  border-color: var(--gold);
  background: var(--gold);
  color: var(--ink);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 24px 34px;
  background: var(--ink);
  color: rgba(248, 243, 232, 0.64);
  font-size: 0.9rem;
}

.site-footer a {
  color: var(--paper-light);
}

@media (max-width: 1050px) {
  .hero,
  .profile-grid,
  .channel-grid,
  .proof-grid,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 104px;
  }

  .quick-facts {
    grid-template-columns: 1fr;
  }

  .channel-card {
    min-height: auto;
  }

  .proof-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .site-header {
    align-items: flex-start;
    gap: 10px;
    padding: 14px 14px;
  }

  .brand-text {
    display: none;
  }

  .site-nav {
    max-width: calc(100vw - 74px);
    overflow-x: auto;
  }

  .site-nav a {
    min-width: 48px;
    padding-inline: 10px;
    white-space: nowrap;
  }

  .hero,
  .section,
  .contact-section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero h1 {
    font-size: clamp(3.35rem, 19vw, 5rem);
  }

  .hero-lede {
    font-size: 1.12rem;
  }

  .hero-actions,
  .contact-actions,
  .button {
    width: 100%;
  }

  .proof-grid,
  .method-row {
    grid-template-columns: 1fr;
  }

  .method-row {
    gap: 6px;
  }

  .site-footer {
    flex-direction: column;
    padding-inline: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}