:root {
  --navy-950: #061127;
  --navy-900: #0a1a38;
  --navy-800: #12294f;
  --navy-700: #1e3c68;
  --ink: #10192b;
  --text: #35425a;
  --muted: #69748a;
  --cream: #fff8e8;
  --paper: #fffdf8;
  --surface: #ffffff;
  --sun: #ffcc32;
  --orange: #f39324;
  --coral: #f06d4f;
  --line: rgba(17, 37, 72, 0.12);
  --shadow: 0 24px 70px rgba(9, 27, 59, 0.14);
  --shadow-soft: 0 14px 34px rgba(9, 27, 59, 0.09);
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --content: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 5%, rgba(255, 204, 50, 0.14), transparent 23rem),
    linear-gradient(180deg, #fffdfa 0%, #fff8e8 43%, #f7f8fc 100%);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

button {
  color: inherit;
  font: inherit;
}

:focus-visible {
  outline: 3px solid var(--sun);
  outline-offset: 4px;
}

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

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 10px;
  color: #fff;
  background: var(--navy-950);
  transform: translateY(-150%);
}

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

.site-header {
  position: fixed;
  top: 16px;
  left: 50%;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(var(--content), calc(100% - 32px));
  min-height: 66px;
  padding: 9px 12px 9px 14px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 22px;
  background: rgba(255, 253, 248, 0.88);
  box-shadow: 0 14px 40px rgba(6, 17, 39, 0.12);
  transform: translateX(-50%);
  backdrop-filter: blur(18px);
  transition: background 180ms ease, box-shadow 180ms ease, top 180ms ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  top: 8px;
  background: rgba(255, 253, 248, 0.97);
  box-shadow: 0 18px 48px rgba(6, 17, 39, 0.18);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 19px;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.brand img {
  width: 46px;
  height: 46px;
  border: 2px solid #fff;
  border-radius: 15px;
  background: var(--sun);
  box-shadow: 0 8px 18px rgba(243, 147, 36, 0.25);
  object-fit: cover;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 13px;
  border-radius: 13px;
  color: #536079;
  font-size: 14px;
  font-weight: 800;
  transition: color 160ms ease, background 160ms ease, transform 160ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--navy-900);
  background: #fff0be;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 14px;
  background: #fff0be;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  border-radius: 999px;
  background: var(--navy-900);
}

main {
  min-height: 70vh;
}

.hero {
  padding: 96px 0 22px;
}

.hero-stage {
  position: relative;
  min-height: 610px;
  border-radius: var(--radius-xl);
  color: #fff;
  background: var(--navy-950);
  box-shadow: var(--shadow);
  overflow: hidden;
  isolation: isolate;
}

.hero-stage::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background: linear-gradient(90deg, rgba(4, 14, 34, 0.86) 0%, rgba(4, 14, 34, 0.62) 35%, rgba(4, 14, 34, 0.06) 70%);
}

.hero-stage > img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: min(590px, 58%);
  min-height: 610px;
  padding: 76px 0 62px 62px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 34px;
  margin: 0 0 18px;
  padding: 5px 13px;
  border: 1px solid rgba(255, 204, 50, 0.4);
  border-radius: 999px;
  color: #ffe080;
  background: rgba(255, 204, 50, 0.12);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.04em;
}

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

h1,
h2,
h3 {
  color: var(--ink);
  line-height: 1.16;
}

.hero h1 {
  max-width: 590px;
  margin-bottom: 20px;
  color: #fff;
  font-size: clamp(44px, 6vw, 76px);
  letter-spacing: -0.04em;
}

.hero-lede {
  max-width: 560px;
  margin-bottom: 28px;
  color: #e4e9f3;
  font-size: 18px;
}

.hero-actions,
.page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 12px 22px;
  border-radius: 15px;
  font-weight: 900;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

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

.btn-primary {
  color: var(--navy-950);
  background: linear-gradient(135deg, var(--sun), var(--orange));
  box-shadow: 0 14px 30px rgba(243, 147, 36, 0.3);
}

.btn-secondary {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.32);
  backdrop-filter: blur(10px);
}

.btn-dark {
  color: #fff;
  background: var(--navy-900);
}

.btn-light {
  color: var(--navy-900);
  background: #fff;
  box-shadow: inset 0 0 0 1px var(--line);
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 14px;
}

.trust-card {
  display: grid;
  grid-template-columns: 46px 1fr;
  align-items: center;
  gap: 12px;
  min-height: 92px;
  padding: 16px 18px;
  border: 1px solid rgba(17, 37, 72, 0.08);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow-soft);
}

.trust-card > span:first-child,
.feature-card > span,
.category-card > span {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  color: var(--navy-900);
  background: #fff0be;
  font-weight: 900;
}

.trust-card > span:last-child {
  min-width: 0;
}

.trust-card strong,
.trust-card small {
  display: block;
}

.trust-card strong {
  color: var(--ink);
  font-size: 16px;
}

.trust-card small {
  color: var(--muted);
}

.section {
  padding: 76px 0;
}

.section-compact {
  padding: 34px 0 72px;
}

.section-dark {
  color: #dbe3f2;
  background: var(--navy-950);
}

.section-dark h2,
.section-dark h3 {
  color: #fff;
}

.section-kicker {
  margin-bottom: 9px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-heading {
  max-width: 680px;
  margin-bottom: 28px;
}

.section-heading h2 {
  margin-bottom: 13px;
  font-size: clamp(30px, 4.6vw, 50px);
  letter-spacing: -0.035em;
}

.section-heading p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 17px;
}

.section-dark .section-heading p:last-child {
  color: #aebbd1;
}

.heading-row {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  max-width: none;
}

.text-link {
  color: #d66e16;
  font-weight: 900;
}

.feature-grid,
.category-grid,
.content-grid,
.seo-refresh-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.category-card,
.content-card,
.seo-refresh-card {
  min-height: 100%;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow-soft);
}

.feature-card > span,
.category-card > span {
  margin-bottom: 24px;
}

.feature-card h3,
.category-card h2,
.category-card h3,
.content-card h2,
.content-card h3,
.seo-refresh-card h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.feature-card p,
.category-card p,
.content-card p,
.content-card li,
.seo-refresh-card p {
  color: var(--muted);
}

.feature-card p:last-child,
.category-card p:last-child,
.content-card p:last-child,
.seo-refresh-card p:last-child {
  margin-bottom: 0;
}

.category-card {
  position: relative;
  overflow: hidden;
}

.category-card::after {
  position: absolute;
  right: -24px;
  bottom: -36px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: rgba(255, 204, 50, 0.16);
  content: "";
}

.category-card:nth-child(2n)::after {
  background: rgba(240, 109, 79, 0.12);
}

.signal-layout {
  display: grid;
  grid-template-columns: 0.88fr 1.12fr;
  gap: 48px;
  align-items: center;
}

.duck-panel {
  position: relative;
  min-height: 460px;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 50% 42%, rgba(255, 224, 128, 0.48), transparent 34%),
    linear-gradient(155deg, #ffcf3b, #f49a24);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.duck-panel::before,
.duck-panel::after {
  position: absolute;
  border: 2px solid rgba(10, 26, 56, 0.18);
  border-radius: 50%;
  content: "";
}

.duck-panel::before {
  top: 36px;
  left: 28px;
  width: 118px;
  height: 118px;
}

.duck-panel::after {
  right: 22px;
  bottom: 24px;
  width: 160px;
  height: 160px;
}

.duck-panel img {
  position: absolute;
  right: 10%;
  bottom: 0;
  z-index: 2;
  width: min(78%, 360px);
  height: auto;
  filter: drop-shadow(0 20px 24px rgba(6, 17, 39, 0.23));
}

.sound-lines {
  position: absolute;
  top: 52px;
  right: 34px;
  display: flex;
  align-items: center;
  gap: 7px;
}

.sound-lines i {
  width: 7px;
  border-radius: 99px;
  background: var(--navy-900);
}

.sound-lines i:nth-child(1),
.sound-lines i:nth-child(5) {
  height: 30px;
}

.sound-lines i:nth-child(2),
.sound-lines i:nth-child(4) {
  height: 54px;
}

.sound-lines i:nth-child(3) {
  height: 78px;
}

.signal-list {
  display: grid;
  gap: 14px;
}

.signal-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 20px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.signal-item b {
  color: var(--sun);
  font-size: 20px;
}

.signal-item h3 {
  margin-bottom: 5px;
  font-size: 19px;
}

.signal-item p {
  margin-bottom: 0;
  color: #aebbd1;
}

.seo-refresh time {
  flex: 0 0 auto;
  padding: 8px 13px;
  border-radius: 999px;
  color: var(--navy-900);
  background: #fff0be;
  font-size: 13px;
  font-weight: 900;
}

.cta-band {
  padding: 28px 0 78px;
}

.cta-card {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 30px;
  padding: 38px;
  border-radius: var(--radius-xl);
  color: #dbe3f2;
  background:
    radial-gradient(circle at 90% 10%, rgba(255, 204, 50, 0.2), transparent 16rem),
    var(--navy-900);
  box-shadow: var(--shadow);
}

.cta-card h2 {
  margin-bottom: 8px;
  color: #fff;
  font-size: clamp(28px, 4vw, 44px);
}

.cta-card p {
  margin-bottom: 0;
  color: #b9c4d8;
}

.subpage-main {
  padding: 104px 0 70px;
}

.subpage-hero {
  position: relative;
  padding: 48px;
  border-radius: var(--radius-xl);
  color: #dbe3f2;
  background:
    radial-gradient(circle at 88% 12%, rgba(255, 204, 50, 0.22), transparent 18rem),
    linear-gradient(135deg, var(--navy-950), var(--navy-800));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.subpage-hero::after {
  position: absolute;
  right: 6%;
  bottom: -80px;
  width: 260px;
  height: 260px;
  border: 34px solid rgba(255, 255, 255, 0.04);
  border-radius: 50%;
  content: "";
}

.subpage-hero .eyebrow {
  margin-bottom: 14px;
}

.subpage-hero h1 {
  position: relative;
  z-index: 1;
  max-width: 790px;
  margin-bottom: 16px;
  color: #fff;
  font-size: clamp(38px, 6vw, 62px);
  letter-spacing: -0.04em;
}

.subpage-hero > p:last-child,
.subpage-hero .hero-summary {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin-bottom: 0;
  color: #b9c4d8;
  font-size: 18px;
}

.subpage-section {
  padding: 34px 0 0;
}

.content-grid {
  margin-top: 22px;
}

.content-card ul,
.content-card ol {
  margin: 0;
  padding-left: 22px;
}

.content-card li + li {
  margin-top: 8px;
}

.wide-card {
  grid-column: span 2;
}

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

.notice {
  margin-top: 22px;
  padding: 18px 20px;
  border-left: 4px solid var(--orange);
  border-radius: 4px 16px 16px 4px;
  color: #5a4a35;
  background: #fff3cf;
}

.notice p:last-child {
  margin-bottom: 0;
}

.steps {
  counter-reset: step;
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.step {
  counter-increment: step;
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
}

.step::before {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  color: var(--navy-900);
  background: var(--sun);
  content: counter(step, decimal-leading-zero);
  font-weight: 900;
}

.step h2,
.step h3 {
  margin-bottom: 5px;
  font-size: 20px;
}

.step p {
  margin-bottom: 0;
  color: var(--muted);
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 44px;
  margin-top: 34px;
}

.faq-intro {
  align-self: start;
  padding: 26px;
  border-radius: var(--radius-lg);
  color: #dbe3f2;
  background: var(--navy-900);
}

.faq-intro h2 {
  color: #fff;
}

.faq-intro p {
  color: #b9c4d8;
}

.faq-list {
  display: grid;
  gap: 12px;
}

details {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

summary {
  cursor: pointer;
  padding: 20px 22px;
  color: var(--ink);
  font-weight: 900;
}

details p {
  margin: 0;
  padding: 0 22px 22px;
  color: var(--muted);
}

.legal-date {
  display: inline-flex;
  margin-top: 14px;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--navy-900);
  background: #fff0be;
  font-size: 13px;
  font-weight: 900;
}

.site-footer {
  padding: 42px 0 28px;
  color: #aab6cb;
  background: var(--navy-950);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.25fr repeat(3, 0.75fr);
  gap: 30px;
}

.footer-brand .brand {
  margin-bottom: 14px;
  color: #fff;
}

.footer-brand p {
  max-width: 420px;
  margin-bottom: 0;
}

.footer-column strong {
  display: block;
  margin-bottom: 12px;
  color: #fff;
}

.footer-column a {
  display: block;
  width: fit-content;
  margin: 8px 0;
}

.footer-column a:hover {
  color: var(--sun);
}

.copyright {
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  font-size: 13px;
}

@media (max-width: 980px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 72px;
    right: 0;
    left: 0;
    display: none;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 5px;
    padding: 12px;
    border-radius: 20px;
    background: #fffdf8;
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    width: 100%;
  }

  .hero-stage,
  .hero-copy {
    min-height: 560px;
  }

  .hero-copy {
    width: 64%;
    padding-left: 42px;
  }

  .feature-grid,
  .category-grid,
  .content-grid,
  .seo-refresh-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .duck-panel {
    min-height: 390px;
  }

  .footer-grid {
    grid-template-columns: 1.5fr repeat(3, 1fr);
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 22px, var(--content));
  }

  .site-header {
    width: min(100% - 20px, var(--content));
  }

  .brand {
    font-size: 17px;
  }

  .brand img {
    width: 42px;
    height: 42px;
  }

  .hero {
    padding-top: 88px;
  }

  .hero-stage {
    min-height: 680px;
  }

  .hero-stage::after {
    background: linear-gradient(180deg, rgba(4, 14, 34, 0.42) 0%, rgba(4, 14, 34, 0.96) 58%, rgba(4, 14, 34, 1) 100%);
  }

  .hero-stage > img {
    height: 54%;
    object-position: 70% center;
  }

  .hero-copy {
    justify-content: end;
    width: 100%;
    min-height: 680px;
    padding: 300px 22px 30px;
  }

  .hero h1 {
    font-size: 42px;
  }

  .hero-lede {
    font-size: 16px;
  }

  .hero-actions,
  .page-actions {
    display: grid;
  }

  .btn {
    width: 100%;
  }

  .trust-row,
  .feature-grid,
  .category-grid,
  .content-grid,
  .seo-refresh-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 56px 0;
  }

  .heading-row {
    align-items: start;
    flex-direction: column;
  }

  .duck-panel {
    min-height: 340px;
  }

  .cta-card {
    grid-template-columns: 1fr;
    padding: 28px 22px;
  }

  .subpage-main {
    padding-top: 94px;
  }

  .subpage-hero {
    padding: 34px 24px;
  }

  .subpage-hero h1 {
    font-size: 40px;
  }

  .wide-card,
  .full-card {
    grid-column: auto;
  }

  .faq-layout {
    grid-template-columns: 1fr;
    gap: 18px;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 430px) {
  .site-nav {
    grid-template-columns: 1fr;
    max-height: calc(100vh - 98px);
    overflow-y: auto;
  }

  .hero-stage,
  .hero-copy {
    min-height: 650px;
  }

  .hero-copy {
    padding-top: 280px;
  }

  .hero h1 {
    font-size: 37px;
  }

  .trust-card {
    grid-template-columns: 42px 1fr;
  }

  .section-heading h2 {
    font-size: 32px;
  }

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

  .footer-brand {
    grid-column: auto;
  }
}

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