@import url("https://fonts.googleapis.com/css2?family=Inter:wght@600;700;800;900&family=Noto+Sans+SC:wght@400;500;600;700;800;900&display=swap");

:root {
  --bg: #ffffff;
  --soft: #f6f7f8;
  --soft-yellow: #fff7d6;
  --text: #181a20;
  --muted: #5f6875;
  --line: #e8eaee;
  --yellow: #f0b90b;
  --yellow-hover: #f6c63d;
  --black: #181a20;
  --shadow: 0 18px 50px rgba(24, 26, 32, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: "Noto Sans SC", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  color: #687180;
  border-bottom: 1px solid var(--line);
  background: #fbfbfc;
  font-size: 12px;
}

.topbar-inner,
.nav-wrap,
.nav-actions,
.footer-wrap,
.hero-actions,
.final-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.topbar-inner {
  min-height: 34px;
  gap: 16px;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(232, 234, 238, 0.92);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.nav-wrap {
  min-height: 72px;
  gap: 18px;
}

.brand {
  display: flex;
  gap: 10px;
  align-items: center;
  font-weight: 900;
}

.brand-mark {
  display: grid;
  width: 31px;
  height: 31px;
  place-items: center;
  color: var(--black);
  border-radius: 7px;
  background: var(--yellow);
  font-family: Inter, "Noto Sans SC", sans-serif;
  font-size: 15px;
  font-weight: 900;
}

.desktop-nav {
  display: flex;
  gap: 28px;
  color: #555e6d;
  font-size: 14px;
  font-weight: 600;
}

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

.nav-actions {
  gap: 10px;
  justify-content: flex-end;
}

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  color: var(--black);
  border: 1px solid var(--yellow);
  border-radius: 6px;
  background: var(--yellow);
  font-size: 15px;
  font-weight: 900;
  line-height: 1;
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.button:hover {
  border-color: var(--yellow-hover);
  background: var(--yellow-hover);
  box-shadow: 0 12px 28px rgba(240, 185, 11, 0.22);
  transform: translateY(-1px);
}

.button-small {
  min-height: 38px;
  padding: 0 15px;
  font-size: 13px;
}

.button-dark {
  color: #fff;
  border-color: var(--black);
  background: var(--black);
}

.button-dark:hover {
  color: #fff;
  border-color: #2b2f36;
  background: #2b2f36;
  box-shadow: 0 12px 28px rgba(24, 26, 32, 0.18);
}

.button-secondary {
  color: var(--black);
  border-color: #d7dbe2;
  background: #fff;
}

.button-secondary:hover {
  border-color: var(--yellow);
  background: var(--soft-yellow);
}

.hero {
  padding: 68px 0 58px;
  background:
    linear-gradient(180deg, #fff 0%, #fff 58%, #f8f9fb 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) 380px;
  gap: 54px;
  align-items: center;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: #9a7400;
  font-family: Inter, "Noto Sans SC", sans-serif;
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 1.4px;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(42px, 6vw, 76px);
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1.08;
}

h2 {
  margin: 0;
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1.24;
}

h3 {
  margin: 0;
  font-size: 21px;
  font-weight: 900;
  line-height: 1.35;
}

.hero-intro {
  max-width: 690px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.85;
}

.hero-actions {
  justify-content: flex-start;
  gap: 14px;
  margin-top: 30px;
}

.hero-actions .button {
  min-width: 190px;
}

.quick-points {
  display: grid;
  grid-template-columns: repeat(4, max-content);
  gap: 10px;
  margin-top: 22px;
}

.quick-points span {
  padding: 8px 10px;
  color: #3b4350;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  font-size: 12px;
  font-weight: 700;
}

.action-panel {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.panel-label {
  display: inline-flex;
  margin-bottom: 16px;
  padding: 7px 10px;
  color: var(--black);
  border-radius: 4px;
  background: var(--yellow);
  font-size: 12px;
  font-weight: 900;
}

.action-panel h2 {
  font-size: 27px;
}

.action-panel p {
  margin: 12px 0 18px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.action-panel .button {
  width: 100%;
  margin-top: 10px;
}

.action-panel small {
  display: block;
  margin-top: 14px;
  color: #7c8593;
  font-size: 12px;
  line-height: 1.65;
}

.trust-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--soft);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.trust-grid div {
  min-height: 86px;
  padding: 20px 18px 20px 0;
  border-right: 1px solid var(--line);
}

.trust-grid div:not(:first-child) {
  padding-left: 20px;
}

.trust-grid div:last-child {
  border-right: 0;
}

.trust-grid strong,
.trust-grid span {
  display: block;
}

.trust-grid strong {
  font-family: Inter, "Noto Sans SC", sans-serif;
  font-size: 15px;
  font-weight: 900;
}

.trust-grid span {
  margin-top: 7px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.section {
  padding: 82px 0;
}

.intro-section,
.steps-section,
.seo-section {
  background: #fff;
}

.entry-section,
.product-section,
.keyword-section,
.faq-section {
  background: var(--soft);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 30px;
}

.section-heading p:last-child {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.section-heading.compact {
  margin-bottom: 24px;
}

.text-grid {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 70px;
}

.article-copy p {
  margin: 0;
  color: #3c4654;
  font-size: 16px;
  line-height: 2;
}

.article-copy p + p {
  margin-top: 16px;
}

.entry-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.entry-card {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.entry-card.primary {
  border-color: #ead08b;
  background: var(--soft-yellow);
}

.entry-card span {
  display: block;
  margin-bottom: 18px;
  color: #9a7400;
  font-family: Inter, "Noto Sans SC", sans-serif;
  font-size: 13px;
  font-weight: 900;
}

.entry-card p {
  min-height: 58px;
  margin: 12px 0 22px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.step-list {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.step-list li {
  min-height: 168px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.step-list span {
  display: grid;
  width: 34px;
  height: 34px;
  margin-bottom: 16px;
  place-items: center;
  color: var(--black);
  border-radius: 6px;
  background: var(--yellow);
  font-family: Inter, "Noto Sans SC", sans-serif;
  font-size: 14px;
  font-weight: 900;
}

.step-list p {
  margin: 0;
  color: #3d4652;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.75;
}

.symbol-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.symbol-grid div {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  gap: 12px;
  align-items: center;
  min-height: 76px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.symbol-grid b {
  font-family: Inter, "Noto Sans SC", sans-serif;
  font-size: 17px;
  font-weight: 900;
}

.symbol-grid span {
  font-size: 14px;
  font-weight: 800;
}

.symbol-grid small {
  color: var(--muted);
  font-size: 12px;
}

.search-list p {
  margin: 0 0 18px;
  color: #3c4654;
  font-size: 16px;
  line-height: 1.8;
}

.search-list ul {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.search-list li {
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  font-size: 14px;
  font-weight: 700;
}

.faq-grid {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 70px;
}

.accordion {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}

.accordion details + details {
  border-top: 1px solid var(--line);
}

.accordion summary {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 22px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 900;
  list-style: none;
}

.accordion summary::-webkit-details-marker {
  display: none;
}

.accordion summary span {
  color: #9a7400;
  font-size: 20px;
  line-height: 1;
  transition: transform 0.18s ease;
}

.accordion details[open] summary span {
  transform: rotate(45deg);
}

.accordion p {
  margin: -4px 22px 20px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.85;
}

.final-cta {
  padding: 78px 0;
  text-align: center;
  background: var(--black);
}

.final-inner {
  max-width: 760px;
}

.final-cta .section-kicker {
  color: var(--yellow);
}

.final-cta h2 {
  color: #fff;
}

.final-cta p:not(.section-kicker) {
  margin: 16px 0 26px;
  color: #c8ced8;
  font-size: 16px;
  line-height: 1.85;
}

.final-actions {
  justify-content: center;
  gap: 12px;
}

.final-actions .button-dark {
  color: var(--black);
  border-color: #fff;
  background: #fff;
}

footer {
  border-top: 1px solid #2d323b;
  background: var(--black);
}

.footer-wrap {
  min-height: 82px;
  color: #fff;
}

.footer-wrap p {
  color: #aeb5c2;
  font-size: 12px;
}

.mobile-sticky-cta {
  display: none;
}

@media (max-width: 1020px) {
  .hero-grid,
  .text-grid,
  .faq-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .action-panel {
    max-width: 520px;
  }

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

@media (max-width: 760px) {
  body {
    padding-bottom: 64px;
  }

  .container {
    width: min(100% - 28px, 1120px);
  }

  .topbar-inner span:last-child,
  .desktop-nav {
    display: none;
  }

  .nav-wrap {
    min-height: 62px;
  }

  .brand {
    font-size: 14px;
  }

  .brand-mark {
    width: 28px;
    height: 28px;
  }

  .nav-actions .button-small {
    min-height: 34px;
    padding: 0 10px;
    font-size: 12px;
  }

  .hero {
    padding: 42px 0 44px;
  }

  h1 {
    font-size: 43px;
    line-height: 1.12;
  }

  .hero-intro {
    font-size: 16px;
    line-height: 1.75;
  }

  .hero-actions,
  .final-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .button,
  .final-actions .button,
  .entry-card .button {
    width: 100%;
  }

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

  .quick-points span {
    text-align: center;
  }

  .trust-grid,
  .entry-grid,
  .symbol-grid,
  .search-list ul {
    grid-template-columns: 1fr;
  }

  .trust-grid div,
  .trust-grid div:not(:first-child) {
    min-height: auto;
    padding: 15px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .trust-grid div:last-child {
    border-bottom: 0;
  }

  .section {
    padding: 62px 0;
  }

  .entry-card p {
    min-height: 0;
  }

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

  .step-list li {
    display: flex;
    min-height: 0;
    gap: 14px;
    align-items: center;
  }

  .step-list span {
    flex: 0 0 34px;
    margin: 0;
  }

  .symbol-grid div {
    grid-template-columns: 68px 1fr;
  }

  .symbol-grid small {
    grid-column: 2;
  }

  .footer-wrap {
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 8px;
  }

  .footer-wrap p {
    margin: 0;
  }

  .mobile-sticky-cta {
    position: fixed;
    z-index: 30;
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 10px 12px;
    border-top: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(14px);
  }

  .mobile-sticky-cta a {
    display: grid;
    min-height: 44px;
    place-items: center;
    border-radius: 6px;
    background: var(--yellow);
    color: var(--black);
    font-size: 14px;
    font-weight: 900;
  }

  .mobile-sticky-cta a:last-child {
    color: #fff;
    background: var(--black);
  }
}