:root {
  --bg: #f4f8fc;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-strong: rgba(255, 255, 255, 0.92);
  --line: rgba(148, 163, 184, 0.2);
  --text: #0f172a;
  --muted: #526077;
  --sky: #0ea5e9;
  --sky-deep: #2563eb;
  --amber: #f59e0b;
  --amber-deep: #d97706;
  --mint: #10b981;
  --ink: #111827;
  --shadow-lg: 0 24px 80px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 16px 48px rgba(15, 23, 42, 0.08);
  --radius-xl: 24px;
  --radius-2xl: 36px;
  --container: 1160px;
  --font-sans: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-display: "Georgia", "Times New Roman", "Songti SC", serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(14, 165, 233, 0.16), transparent 28%),
    radial-gradient(circle at top right, rgba(59, 130, 246, 0.14), transparent 28%),
    linear-gradient(180deg, #f9fcff 0%, var(--bg) 38%, #eef3f9 100%);
  font-family: var(--font-sans);
}

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

button,
input,
textarea {
  font: inherit;
}

.page-shell {
  position: relative;
  overflow: clip;
}

.ambient {
  position: absolute;
  border-radius: 999px;
  filter: blur(110px);
  pointer-events: none;
  opacity: 0.72;
}

.ambient-a {
  top: -120px;
  left: -140px;
  width: 360px;
  height: 360px;
  background: rgba(56, 189, 248, 0.26);
}

.ambient-b {
  top: 320px;
  right: -140px;
  width: 420px;
  height: 420px;
  background: rgba(99, 102, 241, 0.18);
}

.ambient-c {
  bottom: 240px;
  left: 18%;
  width: 460px;
  height: 460px;
  background: rgba(245, 158, 11, 0.12);
}

.container {
  width: min(calc(100% - 32px), var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  padding-top: 18px;
}

.nav-row {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 76px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  transition:
    background-color 0.28s ease,
    border-color 0.28s ease,
    box-shadow 0.28s ease,
    backdrop-filter 0.28s ease;
}

.site-header.scrolled .nav-row {
  background: rgba(255, 255, 255, 0.72);
  border-color: rgba(255, 255, 255, 0.66);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  color: #fff;
  background: linear-gradient(135deg, var(--sky), var(--sky-deep));
  box-shadow: 0 10px 24px rgba(14, 165, 233, 0.28);
}

.brand-mark svg {
  width: 18px;
  height: 18px;
}

.brand-text {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.brand-text em {
  color: var(--sky);
  font-style: normal;
}

.nav-links {
  display: flex;
  gap: 6px;
  margin-left: auto;
}

.nav-links a {
  padding: 11px 14px;
  border-radius: 14px;
  color: var(--muted);
  font-size: 0.96rem;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-links a:hover,
.mobile-menu a:hover {
  background: rgba(255, 255, 255, 0.78);
  color: var(--text);
}

.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 18px;
  border: 1px solid transparent;
  font-weight: 700;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background-color 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease;
}

.nav-cta:hover,
.button:hover {
  transform: translateY(-1px);
}

.nav-cta {
  background: var(--ink);
  color: #fff;
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.16);
}

.menu-toggle {
  display: none;
  margin-left: auto;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  border-radius: 999px;
  background: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.mobile-menu {
  display: none;
  width: min(calc(100% - 32px), var(--container));
  margin: 14px auto 0;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(18px);
}

.mobile-menu a {
  display: block;
  padding: 14px 16px;
  border-radius: 16px;
  color: var(--muted);
}

.mobile-menu.open {
  display: block;
  animation: slideDown 0.28s ease;
}

.hero {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 36px;
  align-items: center;
  padding: 58px 0 26px;
}

.hero-copy,
.hero-panel,
.proof-strip article,
.info-card,
.process-card,
.plan-card,
.notice-card,
.compare-board,
.faq-item,
.contact-banner,
.site-footer {
  position: relative;
}

.hero-copy {
  animation: riseUp 0.8s ease both;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-badges span,
.eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.04);
  color: #516074;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.contact-copy h2 {
  margin: 18px 0 0;
  font-family: var(--font-display);
  line-height: 1.02;
  letter-spacing: -0.05em;
}

.hero h1 {
  max-width: 11ch;
  font-size: clamp(3.2rem, 8vw, 5.6rem);
}

.hero h1 span {
  display: block;
  margin-top: 10px;
  color: transparent;
  background: linear-gradient(135deg, var(--sky), var(--sky-deep));
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-lead,
.section-heading p,
.plan-copy,
.site-footer p,
.faq-answer p,
.contact-copy p {
  color: var(--muted);
  line-height: 1.75;
}

.hero-lead {
  max-width: 62ch;
  margin: 24px 0 0;
  font-size: 1.08rem;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button-dark {
  color: #fff;
  background: linear-gradient(180deg, #0f172a, #111827);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.18);
}

.button-light {
  border-color: rgba(148, 163, 184, 0.28);
  background: rgba(255, 255, 255, 0.8);
  color: var(--text);
}

.button-amber {
  color: #fff;
  background: linear-gradient(135deg, var(--amber), var(--amber-deep));
  box-shadow: 0 20px 44px rgba(245, 158, 11, 0.24);
}

.button-ghost {
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.button.block {
  width: 100%;
}

.trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  padding: 0;
  margin: 28px 0 0;
  list-style: none;
  color: #49586f;
  font-size: 0.95rem;
}

.trust-list li {
  position: relative;
  padding-left: 18px;
}

.trust-list li::before {
  content: "";
  position: absolute;
  top: 0.52rem;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--mint);
  box-shadow: 0 0 0 6px rgba(16, 185, 129, 0.12);
}

.hero-panel {
  animation: riseUp 0.8s 0.12s ease both;
}

.panel-glow {
  position: absolute;
  inset: 8% 4% -8%;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.28), rgba(99, 102, 241, 0.16));
  filter: blur(60px);
}

.status-card,
.proof-strip article,
.info-card,
.process-card,
.plan-card,
.notice-card,
.faq-item {
  border: 1px solid rgba(255, 255, 255, 0.74);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(24px);
}

.status-card {
  padding: 28px;
  border-radius: var(--radius-2xl);
}

.card-topline,
.step-no,
.plan-tag {
  color: #66768c;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--line);
}

.status-row p,
.mini-grid p {
  margin: 0 0 6px;
  color: #6a7b92;
  font-size: 0.88rem;
}

.status-row strong,
.mini-grid strong,
.timeline-item strong,
.proof-strip strong,
.info-card h3,
.process-card h3,
.plan-card h3,
.compare-board h3,
.faq-question span:first-child,
.qr-card strong {
  font-size: 1.02rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
}

.status-pill.online {
  color: #067647;
  background: rgba(16, 185, 129, 0.12);
}

.mini-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  padding: 22px 0;
}

.mini-grid article {
  padding: 16px;
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.54);
}

.timeline {
  display: grid;
  gap: 14px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  align-items: start;
  padding: 14px 0 0;
}

.timeline-item span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 16px;
  background: rgba(15, 23, 42, 0.06);
  color: #516074;
  font-weight: 800;
}

.timeline-item.active span {
  color: #fff;
  background: linear-gradient(135deg, var(--sky), var(--sky-deep));
}

.timeline-item p,
.proof-strip p,
.info-card p,
.process-card p,
.compare-board p,
.qr-card p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.proof-strip article,
.info-card,
.process-card,
.plan-card,
.notice-card {
  padding: 26px;
  border-radius: 28px;
}

.proof-strip strong {
  color: var(--sky-deep);
}

.section {
  padding: 110px 0 0;
}

.section-heading {
  max-width: 860px;
}

.section-heading h2,
.contact-copy h2 {
  font-size: clamp(2.35rem, 5vw, 4.2rem);
}

.section-heading p,
.contact-copy p {
  max-width: 70ch;
  margin-top: 18px;
  font-size: 1.02rem;
}

.card-grid.four-up {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: 18px;
  margin-bottom: 24px;
}

.icon-wrap.sky {
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.16), rgba(37, 99, 235, 0.24));
}

.icon-wrap.gold {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.14), rgba(217, 119, 6, 0.22));
}

.icon-wrap.ink {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.08), rgba(15, 23, 42, 0.18));
}

.icon-wrap.mint {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.14), rgba(14, 165, 233, 0.2));
}

.process-grid,
.pricing-grid {
  display: grid;
  gap: 18px;
  margin-top: 30px;
}

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

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

.plan-card {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.plan-card.featured {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(255, 249, 235, 0.86)),
    rgba(255, 255, 255, 0.7);
  border-color: rgba(251, 191, 36, 0.32);
  transform: translateY(-10px);
}

.plan-price {
  margin: 18px 0 0;
  color: var(--text);
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.stock-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 22px 0 26px;
}

.stock-bar {
  flex: 1 1 auto;
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.16);
}

.stock-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #34d399, #22c55e);
}

.stock-fill-high {
  width: 78%;
}

.stock-fill-mid {
  width: 52%;
}

.stock-fill-empty {
  width: 0;
}

.stock-text {
  flex: 0 0 auto;
  color: #22c55e;
  font-weight: 700;
  white-space: nowrap;
}

.plan-card ul {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 22px 0 26px;
  list-style: none;
  color: #4b5b72;
}

.plan-card li {
  position: relative;
  padding-left: 18px;
}

.plan-card li::before {
  content: "";
  position: absolute;
  top: 0.62rem;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--sky);
}

.plan-card .button {
  margin-top: auto;
}

.notice-card {
  margin-top: 18px;
  color: #53637b;
  background: rgba(255, 255, 255, 0.58);
}

.compare-section .compare-board,
.contact-banner {
  overflow: hidden;
  border-radius: 36px;
}

.compare-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 28px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.26), rgba(148, 163, 184, 0.16));
  border: 1px solid rgba(255, 255, 255, 0.7);
}

.compare-board article {
  padding: 30px;
  background: rgba(255, 255, 255, 0.86);
}

.compare-board span {
  color: #64748b;
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.faq-list {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.faq-item {
  border-radius: 24px;
  overflow: hidden;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  padding: 22px 24px;
  border: 0;
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
}

.faq-icon {
  flex: 0 0 auto;
  color: var(--sky-deep);
  font-size: 1.5rem;
  line-height: 1;
  transition: transform 0.2s ease;
}

.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.24s ease;
}

.faq-answer p {
  overflow: hidden;
  padding: 0 24px 0;
  margin: 0;
}

.faq-item.open .faq-answer {
  grid-template-rows: 1fr;
}

.faq-item.open .faq-answer p {
  padding-bottom: 22px;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.contact-section {
  padding-bottom: 120px;
}

.contact-banner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  padding: 36px;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(2, 6, 23, 0.98)),
    url("grid.svg") center / cover;
  box-shadow: 0 34px 80px rgba(2, 6, 23, 0.32);
}

.eyebrow.light {
  color: rgba(255, 255, 255, 0.78);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
}

.qr-card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
  text-align: center;
}

.qq-avatar {
  display: grid;
  place-items: center;
  width: 140px;
  height: 140px;
  margin: 0 auto 10px;
  border-radius: 36px;
  background:
    radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.4)),
    linear-gradient(135deg, #38bdf8, #2563eb);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.38),
    0 24px 48px rgba(37, 99, 235, 0.28);
}

.qq-avatar span {
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.site-footer {
  padding: 0 0 46px;
  background: transparent;
}

.footer-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding-top: 10px;
  border-top: 1px solid rgba(148, 163, 184, 0.18);
}

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

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  padding-top: 10px;
  color: #5b697f;
}

.footer-links a:hover {
  color: var(--text);
}

@keyframes riseUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1040px) {
  .hero,
  .contact-banner,
  .card-grid.four-up,
  .process-grid {
    grid-template-columns: 1fr;
  }

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

  .proof-strip,
  .compare-board {
    grid-template-columns: 1fr;
  }

  .plan-card.featured {
    transform: none;
  }
}

@media (max-width: 860px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .menu-toggle {
    display: inline-block;
  }

  .site-header.menu-open .mobile-menu {
    display: block;
  }

  .hero {
    padding-top: 42px;
  }

  .hero h1 {
    max-width: none;
    font-size: clamp(2.7rem, 14vw, 4.5rem);
  }

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

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

@media (max-width: 640px) {
  .container {
    width: min(calc(100% - 20px), var(--container));
  }

  .nav-row {
    min-height: 68px;
    padding: 0 14px;
  }

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

  .status-card,
  .proof-strip article,
  .info-card,
  .process-card,
  .plan-card,
  .notice-card,
  .contact-banner {
    padding: 22px;
  }

  .section {
    padding-top: 88px;
  }

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

  .hero-actions,
  .contact-actions {
    flex-direction: column;
  }

  .button,
  .nav-cta {
    width: 100%;
  }

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

  .qq-avatar {
    width: 120px;
    height: 120px;
  }
}