:root {
  --paper: #f2eee6;
  --surface: #fffdf8;
  --ink: #171512;
  --muted: #746d63;
  --line: #ded5c8;
  --orange: #ff6a2a;
  --orange-deep: #b9432e;
  --orange-soft: #f4ded3;
  --green: #2f6b50;
  --shadow: 0 22px 65px rgba(67, 48, 32, 0.1);
  --radius: 28px;
  --max-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 5%, rgba(255, 106, 42, 0.12), transparent 26rem),
    radial-gradient(circle at 90% 12%, rgba(47, 107, 80, 0.08), transparent 25rem),
    var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  line-height: 1.65;
}

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

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.skip-link {
  position: fixed;
  top: -60px;
  left: 20px;
  z-index: 999;
  padding: 10px 16px;
  border-radius: 12px;
  background: var(--ink);
  color: white;
}

.skip-link:focus {
  top: 20px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid rgba(222, 213, 200, 0.72);
  background: rgba(242, 238, 230, 0.9);
  backdrop-filter: blur(18px);
}

.nav {
  width: min(calc(100% - 40px), var(--max-width));
  min-height: 78px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 21px;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 13px;
}

.brand small {
  display: block;
  margin-top: -4px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.15em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 7px;
}

.nav-links a {
  padding: 9px 13px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  background: var(--surface);
  color: var(--ink);
}

.nav-links .nav-cta {
  margin-left: 7px;
  background: var(--ink);
  color: white;
}

.menu-button {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  color: var(--ink);
  font-size: 20px;
}

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

.hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  align-items: center;
  gap: 72px;
  padding: 76px 0 86px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--orange-deep);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 720px;
  margin-bottom: 24px;
  font-size: clamp(54px, 7vw, 94px);
  line-height: 0.98;
  letter-spacing: -0.075em;
}

.hero h1 span {
  color: var(--orange);
}

.lead {
  max-width: 640px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 21px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: white;
  font-weight: 900;
}

.button.secondary {
  border-color: var(--line);
  background: var(--surface);
  color: var(--ink);
}

.microcopy {
  margin-top: 15px;
  color: var(--muted);
  font-size: 12px;
}

.hero-visual {
  position: relative;
  min-height: 520px;
}

.orbit {
  position: absolute;
  inset: 12% 1% 7%;
  border: 1px solid rgba(185, 67, 46, 0.28);
  border-radius: 50%;
  transform: rotate(-10deg);
}

.phone {
  position: absolute;
  width: 292px;
  min-height: 515px;
  padding: 14px;
  border: 8px solid var(--ink);
  border-radius: 44px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.phone.primary {
  top: 0;
  left: 7%;
  transform: rotate(-5deg);
}

.phone.secondary {
  right: 2%;
  bottom: 0;
  transform: rotate(7deg) scale(0.84);
}

.phone-bar {
  width: 42%;
  height: 18px;
  margin: 0 auto 16px;
  border-radius: 999px;
  background: var(--ink);
}

.feed-card {
  padding: 19px;
  border: 1px solid var(--line);
  border-radius: 23px;
  background: white;
}

.feed-meta {
  color: var(--muted);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.feed-copy {
  margin: 15px 0 18px;
  font-size: 19px;
  font-weight: 850;
  line-height: 1.45;
}

.feed-photo {
  height: 205px;
  border-radius: 18px;
  background:
    radial-gradient(circle at 67% 24%, #ffe59f 0 10%, transparent 11%),
    linear-gradient(160deg, #adc8be 0 41%, #637d73 42% 67%, #2b3b34 68%);
}

.feed-actions {
  display: flex;
  justify-content: space-between;
  margin-top: 17px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.rank-card {
  margin-top: 13px;
  padding: 18px;
  border-radius: 19px;
  background: var(--ink);
  color: white;
}

.rank-card strong {
  display: block;
  font-size: 36px;
  letter-spacing: -0.05em;
}

.rank-card span {
  color: #d7d0c6;
  font-size: 12px;
}

.floating-note {
  position: absolute;
  right: 0;
  top: 58px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--surface);
  box-shadow: 0 14px 30px rgba(67, 48, 32, 0.1);
  font-size: 12px;
  font-weight: 900;
  transform: rotate(4deg);
}

.section {
  padding: 95px 0;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 38px;
}

.section-heading h2,
.page-intro h1 {
  margin-bottom: 0;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.06;
  letter-spacing: -0.06em;
}

.section-heading p {
  max-width: 500px;
  margin-bottom: 5px;
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.feature {
  min-height: 245px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 253, 248, 0.83);
}

.feature-number {
  display: inline-grid;
  width: 38px;
  height: 38px;
  place-items: center;
  margin-bottom: 36px;
  border-radius: 50%;
  background: var(--orange-soft);
  color: var(--orange-deep);
  font-size: 12px;
  font-weight: 900;
}

.feature h3 {
  margin-bottom: 8px;
  font-size: 21px;
}

.feature p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}

.showcase {
  overflow: hidden;
  padding: 58px;
  border-radius: 38px;
  background: var(--ink);
  color: white;
}

.showcase .section-heading p {
  color: #bcb4aa;
}

.screenshots {
  display: grid;
  grid-template-columns: 0.76fr 1.24fr;
  align-items: end;
  gap: 24px;
}

.screenshot {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 28px;
  background: #efece5;
}

.screenshot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.screenshot.portrait {
  max-height: 620px;
}

.screenshot.landscape {
  max-height: 490px;
}

.screenshot-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  background: #25221e;
  color: #d7d0c6;
  font-size: 12px;
}

.governance-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 18px;
}

.governance-card {
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.governance-card.accent {
  background: var(--orange-soft);
}

.governance-card h3 {
  font-size: 28px;
  letter-spacing: -0.04em;
}

.governance-card p,
.governance-card li {
  color: var(--muted);
}

.governance-card ul {
  margin: 0;
  padding-left: 20px;
}

.site-footer {
  margin-top: 40px;
  padding: 60px 0 26px;
  border-top: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.5);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 0.7fr);
  gap: 44px;
}

.footer-copy {
  max-width: 390px;
  color: var(--muted);
  font-size: 14px;
}

.footer-column h3 {
  margin-bottom: 13px;
  font-size: 13px;
}

.footer-column a,
.footer-column span {
  display: block;
  margin: 8px 0;
  color: var(--muted);
  font-size: 13px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 44px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.footer-bottom a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-intro {
  padding: 86px 0 48px;
}

.page-intro p {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.content-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  align-items: start;
  gap: 42px;
  padding-bottom: 90px;
}

.toc {
  position: sticky;
  top: 108px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 253, 248, 0.72);
}

.toc strong {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
}

.toc a {
  display: block;
  padding: 7px 0;
  color: var(--muted);
  font-size: 13px;
}

.policy {
  padding: 34px clamp(24px, 5vw, 58px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.policy section {
  scroll-margin-top: 110px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.policy section:last-child {
  border-bottom: 0;
}

.policy h2 {
  font-size: 24px;
  letter-spacing: -0.03em;
}

.policy p,
.policy li {
  color: #5f584f;
}

.policy li + li {
  margin-top: 7px;
}

.notice {
  margin-bottom: 24px;
  padding: 18px 20px;
  border: 1px solid #dfb9aa;
  border-radius: 18px;
  background: var(--orange-soft);
  color: #743c30;
  font-size: 14px;
}

.product-hero {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 38px;
  padding-bottom: 90px;
}

.category-cloud {
  display: flex;
  flex-wrap: wrap;
  align-content: center;
  gap: 10px;
  padding: 38px;
  border-radius: 34px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.category-cloud span {
  padding: 10px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: white;
  font-size: 14px;
  font-weight: 800;
}

.category-cloud span:nth-child(3n + 1) {
  color: var(--orange-deep);
  transform: rotate(-2deg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  padding-bottom: 100px;
}

.contact-card {
  min-height: 230px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.contact-card h2 {
  font-size: 25px;
}

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

.contact-value {
  display: inline-block;
  margin-top: 14px;
  font-size: clamp(18px, 3vw, 28px);
  font-weight: 900;
  word-break: break-word;
}

.steps {
  display: grid;
  gap: 15px;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 24px 24px 24px 74px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: white;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: 24px;
  left: 22px;
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: white;
  font-size: 12px;
  font-weight: 900;
}

@media (max-width: 940px) {
  .menu-button {
    display: inline-grid;
    place-items: center;
  }

  .nav-links {
    position: absolute;
    top: 70px;
    right: 20px;
    left: 20px;
    display: none;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: var(--surface);
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: grid;
  }

  .nav-links .nav-cta {
    margin-left: 0;
    text-align: center;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 35px;
    padding-top: 60px;
  }

  .hero-visual {
    width: min(100%, 570px);
    margin: 0 auto;
  }

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

  .section-heading {
    display: block;
  }

  .section-heading p {
    margin-top: 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .content-layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }

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

@media (max-width: 640px) {
  .nav,
  .container {
    width: min(calc(100% - 28px), var(--max-width));
  }

  .hero {
    min-height: auto;
    padding: 48px 0 58px;
  }

  h1 {
    font-size: 51px;
  }

  .hero-visual {
    min-height: 430px;
  }

  .phone {
    width: 250px;
    min-height: 435px;
  }

  .phone.secondary {
    display: none;
  }

  .phone.primary {
    left: 50%;
    transform: translateX(-50%) rotate(-3deg);
  }

  .floating-note {
    right: 1%;
    top: 40px;
  }

  .feed-photo {
    height: 142px;
  }

  .section {
    padding: 68px 0;
  }

  .feature-grid,
  .screenshots,
  .governance-grid,
  .contact-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .feature {
    min-height: 210px;
  }

  .showcase {
    padding: 30px 18px;
    border-radius: 28px;
  }

  .screenshot.landscape {
    min-height: 350px;
  }

  .footer-bottom {
    display: block;
  }

  .page-intro {
    padding-top: 58px;
  }

  .policy {
    padding: 22px 20px;
  }
}

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