:root {
  --ink: #142033;
  --ink-soft: #3d4f66;
  --paper: #f4f8fc;
  --panel: rgba(255, 255, 255, 0.78);
  --line: rgba(20, 32, 51, 0.1);
  --brand: #4a9fe8;
  --brand-deep: #2f7fd0;
  --brand-soft: #d7ecfb;
  --accent: #0f8a74;
  --warn: #b45309;
  --shadow: 0 24px 60px rgba(31, 74, 120, 0.12);
  --radius: 18px;
  --font-display: "Fraunces", "Songti SC", "Noto Serif SC", Georgia, serif;
  --font-body: "Manrope", "PingFang SC", "Noto Sans SC", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.6;
  background:
    radial-gradient(1200px 600px at 12% -10%, #c8e6fb 0%, transparent 55%),
    radial-gradient(900px 500px at 95% 8%, #d9f3ee 0%, transparent 50%),
    linear-gradient(180deg, #eef5fb 0%, var(--paper) 42%, #e8f1f8 100%);
}

a {
  color: var(--brand-deep);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--ink);
}

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

.wrap {
  width: min(1080px, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(244, 248, 252, 0.82);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: inherit;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.625rem;
  line-height: 1;
  font-weight: 700;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem 1.1rem;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--ink);
}

.lang-toggle {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  cursor: pointer;
  font: inherit;
  color: var(--ink-soft);
}

.hero {
  padding: 4.5rem 0 3.25rem;
  display: grid;
  grid-template-columns: minmax(240px, 0.78fr) minmax(0, 1.42fr);
  gap: 1.6rem;
  align-items: center;
  width: min(1180px, calc(100% - 2rem));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin: 0 0 1rem;
  color: var(--brand-deep);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero-lead {
  margin: 1.1rem 0 1.6rem;
  max-width: 28rem;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: 999px;
  padding: 0.8rem 1.25rem;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 10px 24px rgba(74, 159, 232, 0.35);
}

.btn-primary:hover {
  background: var(--brand-deep);
  color: #fff;
}

.btn-secondary {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}

.hero-visual {
  position: relative;
  width: 100%;
  margin-left: -0.75rem;
  animation: rise-in 0.8s ease both;
}

.browser-chrome {
  border-radius: 10px;
  overflow: hidden;
  box-shadow:
    0 1px 2px rgba(20, 32, 51, 0.06),
    0 18px 48px rgba(31, 74, 120, 0.18);
  border: 1px solid rgba(60, 64, 67, 0.22);
  background: #dee1e6;
}

.browser-titlebar {
  display: flex;
  align-items: flex-end;
  gap: 0.4rem;
  min-height: 0;
  padding: 0.2rem 0.3rem 0;
  background: #dee1e6;
}

.browser-traffic {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  padding: 0 0.2rem 0.32rem 0.28rem;
}

.browser-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  box-shadow: inset 0 0 0 0.5px rgba(0, 0, 0, 0.12);
}

.browser-dot-close { background: #ff5f57; }
.browser-dot-min { background: #febc2e; }
.browser-dot-max { background: #28c840; }

.browser-tabs {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  min-width: 0;
  flex: 1;
  padding-right: 0.25rem;
}

.browser-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  max-width: 140px;
  min-width: 0;
  height: 22px;
  padding: 0 0.4rem 0 0.45rem;
  border-radius: 6px 6px 0 0;
  background: #fff;
  color: #202124;
  font-size: 0.65rem;
  font-weight: 500;
  box-shadow: 0 -1px 0 rgba(255, 255, 255, 0.8) inset;
}

.browser-tab-favicon {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  object-fit: contain;
  flex-shrink: 0;
}

.browser-tab-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.browser-tab-close {
  width: 6px;
  height: 6px;
  margin-left: auto;
  flex-shrink: 0;
  opacity: 0.4;
  background:
    linear-gradient(45deg, transparent 42%, #5f6368 42%, #5f6368 58%, transparent 58%),
    linear-gradient(-45deg, transparent 42%, #5f6368 42%, #5f6368 58%, transparent 58%);
}

.browser-tab-new {
  width: 16px;
  height: 16px;
  margin: 0 0 0.18rem 0.1rem;
  border-radius: 50%;
  position: relative;
  flex-shrink: 0;
  background: transparent;
}

.browser-tab-new::before,
.browser-tab-new::after {
  content: "";
  position: absolute;
  inset: 50% auto auto 50%;
  background: #5f6368;
  border-radius: 1px;
}

.browser-tab-new::before {
  width: 8px;
  height: 1.2px;
  transform: translate(-50%, -50%);
}

.browser-tab-new::after {
  width: 1.2px;
  height: 8px;
  transform: translate(-50%, -50%);
}

.browser-toolbar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.22rem 0.4rem 0.28rem;
  background: #fff;
  border-bottom: 1px solid #dadce0;
}

.browser-nav {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  flex-shrink: 0;
  padding-left: 0.1rem;
}

.browser-nav-btn {
  width: 9px;
  height: 9px;
  opacity: 0.5;
  background: #5f6368;
  clip-path: polygon(40% 0, 0 50%, 40% 100%, 40% 70%, 100% 70%, 100% 30%, 40% 30%);
}

.browser-nav-btn:nth-child(2) {
  opacity: 0.28;
  transform: scaleX(-1);
}

.browser-nav-reload {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1.3px solid #5f6368;
  border-right-color: transparent;
  background: transparent;
  clip-path: none;
  opacity: 0.5;
  position: relative;
}

.browser-nav-reload::after {
  content: "";
  position: absolute;
  top: -1px;
  right: 0;
  width: 3px;
  height: 3px;
  border-top: 1.3px solid #5f6368;
  border-right: 1.3px solid #5f6368;
  transform: rotate(40deg);
}

.browser-omnibox {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex: 1;
  min-width: 0;
  height: 20px;
  padding: 0 0.55rem;
  border-radius: 999px;
  background: #f1f3f4;
  color: #3c4043;
  font-size: 0.62rem;
  font-weight: 500;
}

.browser-omnibox-lock {
  width: 6px;
  height: 7px;
  border: 1.2px solid #5f6368;
  border-radius: 1px;
  position: relative;
  flex-shrink: 0;
  opacity: 0.6;
}

.browser-omnibox-lock::before {
  content: "";
  position: absolute;
  left: 0.5px;
  top: -3.5px;
  width: 3px;
  height: 3.5px;
  border: 1.2px solid #5f6368;
  border-bottom: none;
  border-radius: 3px 3px 0 0;
}

.browser-omnibox-url {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.browser-toolbar-end {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  flex-shrink: 0;
}

.browser-toolbar-icon {
  width: 11px;
  height: 11px;
  border-radius: 2px;
  background:
    radial-gradient(circle at 50% 50%, #5f6368 1.1px, transparent 1.2px),
    radial-gradient(circle at 50% 1.5px, #5f6368 1.1px, transparent 1.2px),
    radial-gradient(circle at 50% 9.5px, #5f6368 1.1px, transparent 1.2px);
  opacity: 0.5;
}

.browser-toolbar-avatar {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(145deg, #8ab4f8, #4a9fe8);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.08);
}

.browser-viewport {
  background: #000;
  line-height: 0;
}

.browser-viewport img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1600 / 796;
  object-fit: cover;
  object-position: center top;
}

.hero-visual-fallback {
  display: grid;
  place-items: center;
  min-height: 280px;
  padding: 2rem;
  color: #fff;
  text-align: center;
  background: linear-gradient(145deg, #1d334f, #2f5f8f 55%, #4a9fe8);
}

.hero-visual-fallback strong {
  font-family: var(--font-display);
  font-size: 1.8rem;
}

@media (max-width: 900px) {
  .browser-tab-label {
    max-width: 72px;
  }

  .browser-omnibox {
    font-size: 0.68rem;
  }
}

.section {
  padding: 3.25rem 0;
}

.section-head {
  margin-bottom: 1.5rem;
}

.section-head h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 0;
  color: var(--ink-soft);
  max-width: 40rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.download-panel {
  padding: 1.5rem 1.6rem;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: var(--shadow);
}

.download-version {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

.download-version strong {
  color: var(--ink);
  font-size: 1.15rem;
}

.download-hint {
  margin: 1rem 0 0;
}

.feature {
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  backdrop-filter: blur(8px);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 30px rgba(31, 74, 120, 0.1);
}

.feature h3 {
  margin: 0 0 0.45rem;
  font-size: 1.05rem;
}

.feature p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(var(--pricing-plan-count, 3), minmax(0, 1fr));
  gap: 1rem;
}

.pricing-promo {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: center;
  gap: 0.35rem 0.65rem;
  margin: 0 0 1rem;
  padding: 0.85rem 1rem;
  border-radius: 14px;
  background: linear-gradient(90deg, rgba(74, 159, 232, 0.16), rgba(15, 138, 116, 0.12));
  border: 1px solid rgba(74, 159, 232, 0.28);
  color: var(--ink);
  text-align: center;
}

.pricing-promo[hidden] {
  display: none !important;
}

.pricing-promo-label {
  font-weight: 700;
}

.pricing-promo-countdown {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-weight: 750;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.plan-billing-slot {
  min-height: 1.6rem;
  margin-top: 0.35rem;
}

.plan-billing-static {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.plan-billing-toggle {
  display: inline-flex;
  gap: 0.25rem;
  padding: 0.15rem;
  border-radius: 999px;
  background: rgba(20, 32, 51, 0.06);
}

.plan-billing-option {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
  cursor: pointer;
}

.plan-billing-option.is-active {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.08);
}

.plan-price-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 0.45rem;
  margin: 0.7rem 0 0.15rem;
}

.plan-price {
  margin: 0;
  font-family: var(--font-display);
  font-size: 2.4rem;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.plan-price-unit {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 650;
  color: var(--ink-soft);
  letter-spacing: -0.01em;
}

.plan-note {
  margin: 0 0 0.2rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.plan-savings {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.plan-savings strong {
  font-weight: 800;
  color: var(--ink);
}

.plan-note + .plan-list,
.plan-note + .plan-list-compare {
  margin-top: 0.85rem;
}

.plan-compare-price {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink-soft);
  text-decoration: line-through;
}

.plan-discount {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  background: rgba(15, 138, 116, 0.12);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
}

.plan-list-compare {
  list-style: none;
  padding-left: 0;
}

.plan-list-compare li {
  display: flex;
  align-items: flex-start;
  gap: 0.45rem;
}

.plan-list-compare li.is-off {
  opacity: 0.45;
}

.plan-feature-mark {
  flex: 0 0 auto;
  width: 1rem;
  font-weight: 800;
  color: var(--accent);
}

.plan-list-compare li.is-off .plan-feature-mark {
  color: #9aa7b8;
}

.plan-feature-text {
  flex: 1;
}

.btn.is-disabled,
a.btn.is-disabled {
  pointer-events: none;
  opacity: 0.55;
}

.price-card {
  padding: 1.5rem;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: #fff;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.price-card.featured {
  border-color: rgba(74, 159, 232, 0.45);
  background:
    linear-gradient(180deg, rgba(215, 236, 251, 0.7), #fff 40%),
    #fff;
  box-shadow: var(--shadow);
}

.plan-name {
  margin: 0;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.plan-price-alt {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink-soft);
}

.plan-price-alt span {
  font-size: 0.88rem;
  font-weight: 600;
}

.plan-list {
  margin: 0 0 1.25rem;
  padding-left: 1.1rem;
  color: var(--ink-soft);
  flex: 1;
}

.plan-list li + li {
  margin-top: 0.35rem;
}

.price-card .btn {
  width: 100%;
  justify-content: center;
  margin-top: auto;
}

.price-card .btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.billing-note {
  margin-top: 1rem;
  padding: 1rem 1.15rem;
  border-radius: 14px;
  background: #fff8ef;
  border: 1px solid rgba(180, 83, 9, 0.2);
  color: #7c3f0a;
  font-size: 0.95rem;
}

.update-list {
  display: grid;
  gap: 0.9rem;
}

.update-item {
  padding: 1.1rem 1.2rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel);
}

.update-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.85rem;
  margin-bottom: 0.35rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.update-item h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}

.update-item p {
  margin: 0;
  color: var(--ink-soft);
}

.support-panel,
.legal-card {
  padding: 1.4rem 1.5rem;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: #fff;
}

.support-panel a.mail {
  font-weight: 800;
  font-size: 1.15rem;
  text-decoration: none;
}

.legal-page {
  padding: 2.5rem 0 4rem;
}

.legal-page h1 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.6rem);
}

.legal-meta {
  margin: 0 0 1.5rem;
  color: var(--ink-soft);
}

.legal-card h2 {
  margin: 1.6rem 0 0.5rem;
  font-size: 1.15rem;
}

.legal-card p,
.legal-card li {
  color: var(--ink-soft);
}

.legal-card ul {
  padding-left: 1.2rem;
}

.site-footer {
  margin-top: 2rem;
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.1rem;
}

.footer-links a {
  color: var(--ink-soft);
  text-decoration: none;
}

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

[data-lang="en"] [data-i18n-zh],
[data-lang="zh"] [data-i18n-en] {
  display: none;
}

.lang-select {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 0.35rem 1.7rem 0.35rem 0.75rem;
  max-width: min(11.5rem, 42vw);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--ink-soft) 50%),
    linear-gradient(135deg, var(--ink-soft) 50%, transparent 50%);
  background-position:
    calc(100% - 14px) 55%,
    calc(100% - 9px) 55%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}

.lang-select:hover,
.lang-select:focus {
  border-color: rgba(74, 159, 232, 0.55);
  outline: none;
}

.mail-nav {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--ink-soft);
  text-decoration: none;
}

.mail-nav:hover {
  color: var(--brand-deep);
}

.footer-support {
  margin-top: 0.35rem;
}

.footer-support a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 600;
}

.footer-support a:hover {
  color: var(--brand-deep);
}

.plan-price-alt[hidden] {
  display: none !important;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(16px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 900px) {
  .hero,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

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

  .hero {
    padding-top: 2.5rem;
    gap: 1.5rem;
    width: min(1080px, calc(100% - 2rem));
  }

  .hero-visual {
    margin-left: 0;
  }

  .nav-links .hide-sm {
    display: none;
  }
}

@media (min-width: 901px) and (max-width: 1100px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}