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

:root {
  --bg: #f5f9ff;
  --bg-soft: #eef4ff;
  --surface: rgba(255, 255, 255, 0.74);
  --surface-strong: rgba(255, 255, 255, 0.9);
  --surface-deep: rgba(8, 20, 37, 0.8);
  --line: rgba(33, 86, 173, 0.14);
  --line-strong: rgba(37, 99, 235, 0.24);
  --ink: #12233b;
  --ink-soft: #566c89;
  --ink-faint: #7b8ea8;
  --white: #ffffff;
  --primary: #2563eb;
  --primary-deep: #1949b8;
  --secondary: #53b6ff;
  --accent: #f97316;
  --accent-soft: #ffd4b4;
  --success: #19ad82;
  --shadow-lg: 0 26px 70px rgba(7, 21, 42, 0.16);
  --shadow-md: 0 18px 40px rgba(10, 24, 44, 0.12);
  --shadow-sm: 0 12px 26px rgba(10, 24, 44, 0.08);
  --radius-2xl: 34px;
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --max-width: 1220px;
  --header-height: 82px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.72;
  background:
    radial-gradient(circle at 14% 8%, rgba(83, 182, 255, 0.28), transparent 22%),
    radial-gradient(circle at 86% 12%, rgba(249, 115, 22, 0.18), transparent 20%),
    radial-gradient(circle at 80% 78%, rgba(37, 99, 235, 0.12), transparent 18%),
    linear-gradient(180deg, #06111f 0, #0b1b31 560px, var(--bg) 560px, var(--bg) 100%);
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}

body::before {
  background:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.56), transparent 72%);
}

body::after {
  background:
    radial-gradient(circle at 26% 16%, rgba(37, 99, 235, 0.12), transparent 18%),
    radial-gradient(circle at 88% 30%, rgba(249, 115, 22, 0.1), transparent 14%);
}

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

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

button,
input,
textarea,
select {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -56px;
  padding: 12px 18px;
  border-radius: 999px;
  background: var(--white);
  color: var(--ink);
  box-shadow: var(--shadow-md);
  z-index: 100;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(6, 17, 31, 0.62);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(22px);
}

.site-header.is-scrolled {
  background: rgba(6, 17, 31, 0.84);
}

.header-inner,
.section-inner,
.footer-inner {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto;
}

.header-inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  width: 52px;
  height: 52px;
  flex: 0 0 auto;
  display: inline-grid;
  place-items: center;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background:
    radial-gradient(circle at 30% 28%, rgba(255, 255, 255, 0.56), transparent 34%),
    linear-gradient(145deg, rgba(83, 182, 255, 0.48), rgba(37, 99, 235, 0.94) 58%, rgba(249, 115, 22, 0.94) 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.24), 0 16px 30px rgba(37, 99, 235, 0.22);
  color: var(--white);
  font-family: "Manrope", "Noto Sans SC", sans-serif;
  font-size: 0.96rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.brand-text {
  min-width: 0;
}

.brand-title {
  display: block;
  color: var(--white);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.brand-subtitle {
  display: block;
  margin-top: 2px;
  color: rgba(255, 255, 255, 0.64);
  font-size: 0.85rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav a {
  min-height: 46px;
  padding: 10px 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.76);
  transition: color 180ms ease, background-color 180ms ease, transform 180ms ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.header-cta {
  display: inline-flex;
  align-items: center;
}

.nav-toggle {
  display: none;
  width: 48px;
  height: 48px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  cursor: pointer;
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

.button,
.button-secondary,
.button-link {
  min-height: 54px;
  padding: 0 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 0;
  border-radius: 999px;
  font-weight: 800;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease, color 180ms ease;
}

.button:hover,
.button-secondary:hover,
.button-link:hover {
  transform: translateY(-2px);
}

.button {
  color: var(--white);
  background: linear-gradient(135deg, var(--accent), #ff5e14);
  box-shadow: 0 18px 34px rgba(249, 115, 22, 0.26);
}

.button-secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 16px 34px rgba(5, 16, 31, 0.1);
}

.button-link {
  min-height: auto;
  padding: 0;
  color: var(--primary-deep);
}

.button-link::after,
.resource-link::after,
.friend-link::after {
  content: "->";
}

.section {
  padding: 72px 0;
  scroll-margin-top: calc(var(--header-height) + 18px);
}

.hero {
  position: relative;
  padding-top: 42px;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 540px;
  background:
    radial-gradient(circle at 18% 4%, rgba(83, 182, 255, 0.18), transparent 24%),
    radial-gradient(circle at 86% 6%, rgba(249, 115, 22, 0.16), transparent 18%);
  pointer-events: none;
}

.hero-grid,
.download-hero,
.split-grid,
.authority-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  align-items: center;
}

.eyebrow,
.meta-pill,
.status-pill,
.mini-tag,
.warning-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.84);
  backdrop-filter: blur(14px);
  font-size: 0.9rem;
  font-weight: 700;
}

.eyebrow strong,
.warning-pill {
  color: #ffd2b0;
}

.display,
.section-title {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  font-weight: 900;
}

.display {
  max-width: 9ch;
  color: var(--white);
  font-size: clamp(3rem, 7vw, 5.7rem);
}

.display .accent {
  color: var(--secondary);
}

.section-title {
  color: var(--ink);
}

.lead,
.section-copy {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 1.04rem;
}

.hero .lead {
  color: rgba(255, 255, 255, 0.8);
}

.section-copy {
  color: var(--ink-soft);
}

.hero-actions,
.meta-row,
.tag-row,
.platform-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-actions {
  margin-top: 26px;
}

.meta-row {
  margin-top: 22px;
}

.hero-note,
.section-note,
.small-note {
  margin: 16px 0 0;
  font-size: 0.94rem;
}

.hero-note {
  color: rgba(255, 255, 255, 0.68);
}

.section-note,
.small-note {
  color: var(--ink-soft);
}

.glass-card,
.panel-card,
.metric-card,
.feature-card,
.solution-card,
.step-card,
.quote-card,
.resource-card,
.friend-card,
.rule-card,
.download-card,
.cta-band,
.callout,
.faq-card details {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  border: 1px solid var(--line);
  background: var(--surface);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-md);
}

.glass-card::before,
.panel-card::before,
.metric-card::before,
.feature-card::before,
.solution-card::before,
.step-card::before,
.quote-card::before,
.resource-card::before,
.friend-card::before,
.rule-card::before,
.download-card::before,
.cta-band::before,
.callout::before,
.faq-card details::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.16), transparent 44%);
  pointer-events: none;
}

.hero-visual,
.image-panel {
  padding: 18px;
  border-radius: var(--radius-2xl);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.05)),
    rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 26px 56px rgba(5, 16, 31, 0.28);
  backdrop-filter: blur(20px);
}

.hero-visual img,
.image-panel img {
  width: 100%;
  border-radius: calc(var(--radius-xl) - 4px);
}

.hero-stack {
  display: grid;
  gap: 18px;
}

.panel-card.dark {
  padding: 24px;
  border-radius: var(--radius-xl);
  background: var(--surface-deep);
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 26px 56px rgba(5, 16, 31, 0.3);
  color: var(--white);
}

.panel-card.dark p {
  color: rgba(255, 255, 255, 0.72);
}

.quick-board h2 {
  margin: 0 0 8px;
  color: var(--white);
  font-size: 1.18rem;
}

.quick-board p {
  margin: 0;
}

.quick-list {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.quick-list article {
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.quick-list strong {
  display: block;
  color: var(--white);
  font-size: 1rem;
}

.quick-list span {
  display: block;
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.92rem;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 18px;
  margin-bottom: 28px;
}

.kicker {
  display: inline-block;
  margin-bottom: 10px;
  font-family: "Manrope", "Noto Sans SC", sans-serif;
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--primary);
}

.metric-grid,
.feature-grid,
.solution-grid,
.quote-grid,
.resource-grid,
.faq-grid,
.friend-grid,
.rule-grid,
.download-grid,
.comparison-grid {
  display: grid;
  gap: 20px;
}

.metric-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-grid,
.solution-grid,
.download-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.quote-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.friend-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.rule-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric-card,
.feature-card,
.solution-card,
.step-card,
.quote-card,
.resource-card,
.friend-card,
.rule-card,
.download-card,
.cta-band,
.callout {
  padding: 24px;
}

.metric-label,
.card-tag,
.plan-tag,
.quote-role,
.resource-type,
.friend-type,
.rule-tag,
.download-type {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary-deep);
  font-size: 0.82rem;
  font-weight: 800;
}

.metric-value {
  display: block;
  margin-top: 16px;
  font-family: "Manrope", "Noto Sans SC", sans-serif;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1;
  font-weight: 800;
}

.metric-card p,
.feature-card p,
.solution-card p,
.step-card p,
.quote-card p,
.resource-card p,
.friend-card p,
.rule-card p,
.download-card p,
.cta-band p,
.callout p {
  margin: 14px 0 0;
  color: var(--ink-soft);
}

.card-title,
.step-card h3,
.quote-card h3,
.resource-card h3,
.friend-card h3,
.rule-card h3,
.download-card h3,
.cta-band h3,
.callout h3 {
  margin: 0;
  font-size: 1.18rem;
  line-height: 1.36;
}

.feature-list,
.solution-list,
.resource-list,
.footer-links {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
}

.feature-list li,
.solution-list li,
.resource-list li,
.footer-links li {
  position: relative;
  padding-left: 18px;
}

.feature-list li + li,
.solution-list li + li,
.resource-list li + li,
.footer-links li + li {
  margin-top: 10px;
}

.feature-list li::before,
.solution-list li::before,
.resource-list li::before,
.footer-links li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  transform: translateY(-50%);
}

.solution-card.highlight {
  background:
    radial-gradient(circle at top right, rgba(249, 115, 22, 0.18), transparent 28%),
    linear-gradient(180deg, rgba(37, 99, 235, 0.08), rgba(255, 255, 255, 0.84)),
    var(--surface-strong);
}

.step-flow {
  display: grid;
  gap: 16px;
}

.step-card {
  display: grid;
  grid-template-columns: 68px 1fr;
  gap: 18px;
  align-items: start;
}

.step-number {
  width: 68px;
  height: 68px;
  display: inline-grid;
  place-items: center;
  border-radius: 24px;
  background: linear-gradient(145deg, rgba(37, 99, 235, 0.12), rgba(249, 115, 22, 0.18));
  color: var(--primary-deep);
  font-family: "Manrope", "Noto Sans SC", sans-serif;
  font-size: 1.2rem;
  font-weight: 800;
}

.info-table {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.info-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.info-row span:first-child {
  color: rgba(255, 255, 255, 0.62);
}

.info-row span:last-child {
  color: var(--white);
  text-align: right;
}

.quote-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.quote-sign {
  color: var(--primary-deep);
  font-weight: 800;
}

.faq-card {
  border-radius: var(--radius-xl);
}

.faq-card summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px;
  font-weight: 800;
}

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

.faq-card summary::after {
  content: "+";
  flex: 0 0 auto;
  font-size: 1.4rem;
  color: var(--accent);
}

.faq-card details[open] summary::after {
  content: "-";
}

.faq-body {
  padding: 0 24px 24px;
}

.faq-body p {
  margin: 0;
  color: var(--ink-soft);
}

.resource-link,
.friend-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  color: var(--primary-deep);
  font-weight: 800;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.92rem;
}

.download-note {
  padding: 18px 20px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(14px);
}

.download-note strong {
  display: block;
  color: var(--white);
  font-size: 1rem;
}

.download-note span {
  display: block;
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.92rem;
}

.tag-row {
  margin-top: 18px;
}

.platform-tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary-deep);
  font-size: 0.84rem;
  font-weight: 700;
}

.cta-band,
.callout {
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(83, 182, 255, 0.08) 45%, rgba(249, 115, 22, 0.12) 100%),
    rgba(255, 255, 255, 0.84);
}

.cta-band .hero-actions {
  margin-top: 20px;
}

.site-footer {
  padding: 42px 0 52px;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(2, minmax(0, 0.8fr));
  gap: 24px;
  padding: 28px;
  border-radius: var(--radius-2xl);
  background:
    radial-gradient(circle at top right, rgba(249, 115, 22, 0.14), transparent 26%),
    rgba(5, 15, 30, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 26px 54px rgba(4, 12, 22, 0.3);
}

.footer-grid h3 {
  margin: 0 0 12px;
  color: var(--white);
  font-size: 1rem;
}

.footer-grid p,
.footer-grid li {
  color: rgba(255, 255, 255, 0.68);
}

.footer-grid .brand-subtitle {
  color: rgba(255, 255, 255, 0.58);
}

.legal-note {
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.88rem;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 420ms ease, transform 420ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .metric-grid,
  .feature-grid,
  .solution-grid,
  .quote-grid,
  .resource-grid,
  .faq-grid,
  .friend-grid,
  .rule-grid,
  .download-grid,
  .comparison-grid,
  .hero-grid,
  .download-hero,
  .split-grid,
  .authority-grid,
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  :root {
    --header-height: 76px;
  }

  .nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .site-nav {
    position: absolute;
    inset: calc(var(--header-height) + 8px) 16px auto 16px;
    padding: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    border-radius: 24px;
    background: rgba(5, 16, 30, 0.94);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 22px 44px rgba(4, 12, 22, 0.28);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 180ms ease, transform 180ms ease;
  }

  .site-nav a {
    justify-content: flex-start;
    border-radius: 18px;
  }

  body.menu-open .site-nav {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .header-cta {
    display: none;
  }
}

@media (max-width: 720px) {
  .header-inner,
  .section-inner,
  .footer-inner {
    width: min(calc(100% - 24px), var(--max-width));
  }

  .section {
    padding: 56px 0;
  }

  .metric-grid,
  .feature-grid,
  .solution-grid,
  .quote-grid,
  .resource-grid,
  .faq-grid,
  .friend-grid,
  .rule-grid,
  .download-grid,
  .comparison-grid,
  .hero-grid,
  .download-hero,
  .split-grid,
  .authority-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .display {
    max-width: none;
  }

  .button,
  .button-secondary {
    width: 100%;
  }

  .button-link {
    width: fit-content;
  }

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

  .info-row {
    flex-direction: column;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.34);
  outline-offset: 3px;
}