:root {
  --ink: #1a2420;
  --ink-soft: #3d4a44;
  --paper: #f3efe6;
  --mist: #e4ebe6;
  --sea: #1f5c4d;
  --sea-deep: #143d34;
  --sand: #c4a574;
  --line: rgba(26, 36, 32, 0.12);
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Source Sans 3", "Segoe UI", sans-serif;
  --max: 68rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  font-size: 1.05rem;
}

img {
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: #fff;
  padding: 0.5rem 1rem;
  z-index: 100;
}

.skip:focus {
  left: 0.5rem;
  top: 0.5rem;
}

.top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.85rem clamp(1rem, 3vw, 2rem);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  text-decoration: none;
  min-width: 7rem;
}

.brand-en {
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-zh {
  font-size: 0.75rem;
  color: var(--ink-soft);
}

.nav {
  display: none;
  gap: 1.25rem;
  font-size: 0.95rem;
  font-weight: 500;
}

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

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

.top-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.lang {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 0.65rem;
  cursor: pointer;
  border-radius: 0.35rem;
}

.lang:hover {
  border-color: var(--sea);
  color: var(--sea);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.7rem 1.15rem;
  border-radius: 0.4rem;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

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

.btn-primary {
  background: var(--sea);
  color: #f7faf8;
}

.btn-primary:hover {
  background: var(--sea-deep);
}

.btn-secondary {
  background: transparent;
  border-color: color-mix(in srgb, #fff 55%, transparent);
  color: #f7faf8;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--ink);
  padding: 0.45rem 0.85rem;
  font-size: 0.88rem;
}

.btn-ghost:hover {
  border-color: var(--sea);
  color: var(--sea);
}

.hero {
  position: relative;
  min-height: min(92vh, 52rem);
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: #f4f7f5;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      165deg,
      rgba(20, 61, 52, 0.55) 0%,
      rgba(20, 61, 52, 0.82) 48%,
      rgba(12, 36, 30, 0.92) 100%
    ),
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(196, 165, 116, 0.28), transparent 55%),
    url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.12'/%3E%3C/svg%3E"),
    linear-gradient(120deg, #1f5c4d, #0f2e28 55%, #24352f);
  background-size: cover;
  animation: heroDrift 18s ease-in-out infinite alternate;
}

@keyframes heroDrift {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.04);
  }
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: clamp(4rem, 12vh, 7rem) clamp(1rem, 3vw, 2rem) clamp(3rem, 8vh, 5rem);
  animation: riseIn 0.9s ease both;
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(1.25rem);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.hero-brand {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.5rem);
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.hero-brand-sub {
  margin: 0.2rem 0 1.5rem;
  font-size: clamp(1.1rem, 2.5vw, 1.45rem);
  color: color-mix(in srgb, #f4f7f5 78%, var(--sand));
  letter-spacing: 0.12em;
}

.hero-title {
  margin: 0 0 0.85rem;
  max-width: 18ch;
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.5vw, 2.35rem);
  font-weight: 500;
  line-height: 1.2;
}

.hero-lead {
  margin: 0 0 1.75rem;
  max-width: 36ch;
  font-size: 1.1rem;
  color: color-mix(in srgb, #f4f7f5 86%, transparent);
}

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

.section {
  padding: clamp(3.5rem, 8vw, 5.5rem) clamp(1rem, 3vw, 2rem);
}

.section-alt {
  background: var(--mist);
}

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

.section h2 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 650;
  letter-spacing: -0.02em;
}

.section-lead {
  margin: 0 0 2rem;
  max-width: 40rem;
  color: var(--ink-soft);
}

.feature-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.feature-list li {
  display: grid;
  gap: 0.25rem;
  padding-bottom: 1.15rem;
  border-bottom: 1px solid var(--line);
  animation: riseIn 0.7s ease both;
}

.feature-list li:nth-child(2) {
  animation-delay: 0.08s;
}
.feature-list li:nth-child(3) {
  animation-delay: 0.16s;
}
.feature-list li:nth-child(4) {
  animation-delay: 0.24s;
}

.feature-list strong {
  font-size: 1.1rem;
}

.feature-list span {
  color: var(--ink-soft);
}

.plans {
  display: grid;
  gap: 1rem;
}

.plan {
  padding: 1.35rem 1.25rem;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 0.5rem;
}

.plan-focus {
  border-color: color-mix(in srgb, var(--sea) 45%, var(--line));
  background: color-mix(in srgb, var(--paper) 70%, var(--mist));
}

.plan h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
}

.price {
  margin: 0 0 0.5rem;
  font-weight: 600;
  color: var(--sea-deep);
}

.plan p:last-child {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.fineprint {
  margin: 1.25rem 0 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.contact {
  text-align: left;
}

.foot {
  border-top: 1px solid var(--line);
  padding: 1.5rem clamp(1rem, 3vw, 2rem) 2rem;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.foot-inner {
  width: min(100%, var(--max));
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
}

@media (min-width: 720px) {
  .nav {
    display: flex;
  }

  .feature-list {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem 2rem;
  }

  .feature-list li {
    border-bottom: none;
    padding: 0;
  }

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

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

  html {
    scroll-behavior: auto;
  }
}