:root {
  --ink: #14212b;
  --ink-soft: #3a4a56;
  --paper: #f3f1ec;
  --paper-2: #e8ebe7;
  --mist: #d5dde3;
  --accent: #0f6b63;
  --accent-deep: #0a4f49;
  --accent-soft: rgba(15, 107, 99, 0.12);
  --line: rgba(20, 33, 43, 0.12);
  --glow: rgba(120, 160, 170, 0.35);
  --font-display: "Cormorant Garamond", "Times New Roman", serif;
  --font-body: "Karla", "Helvetica Neue", sans-serif;
  --max: 68rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  background:
    radial-gradient(ellipse 90% 70% at 12% -10%, var(--glow), transparent 55%),
    radial-gradient(ellipse 70% 50% at 95% 8%, rgba(15, 107, 99, 0.16), transparent 50%),
    linear-gradient(165deg, #eef2f0 0%, var(--paper) 42%, var(--paper-2) 100%);
  background-attachment: fixed;
}

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

a {
  color: var(--accent-deep);
  text-underline-offset: 0.18em;
}

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 1rem;
  z-index: 100;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
  background: rgba(243, 241, 236, 0.78);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 1.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.95rem;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.2rem;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after {
  transform: scaleX(1);
}

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.55);
}

.lang-toggle button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
}

.lang-toggle button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
}

.hero {
  min-height: calc(100vh - 4.2rem);
  display: grid;
  align-items: end;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, rgba(20, 33, 43, 0.72) 0%, rgba(20, 33, 43, 0.35) 45%, rgba(15, 107, 99, 0.25) 100%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160' viewBox='0 0 160 160'%3E%3Cg fill='none' stroke='%23ffffff' stroke-opacity='0.05'%3E%3Cpath d='M0 80h160M80 0v160'/%3E%3C/g%3E%3C/svg%3E"),
    radial-gradient(circle at 70% 40%, #7ea3a8 0%, #1b3340 55%, #0d1a22 100%);
  background-size: cover, 48px 48px, cover;
  z-index: -2;
  animation: heroShift 18s ease-in-out infinite alternate;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -10% -20% -10%;
  height: 55%;
  background: linear-gradient(to top, var(--paper) 18%, transparent 100%);
  z-index: -1;
}

@keyframes heroShift {
  from {
    transform: scale(1);
  }
  to {
    transform: scale(1.05);
  }
}

.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 5.5rem 1.25rem 4.5rem;
  color: #f7f5f1;
}

.profile-photo {
  width: 7.5rem;
  height: 7.5rem;
  object-fit: cover;
  border-radius: 50%;
}

.hero-photo {
  margin: 0 0 1.35rem;
  border: 2px solid rgba(247, 245, 241, 0.55);
  opacity: 0;
  animation: riseIn 0.9s var(--ease) 0.02s forwards;
}

.hero-brand {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(3.4rem, 9vw, 6.4rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  opacity: 0;
  animation: riseIn 0.9s var(--ease) 0.1s forwards;
}

.hero-line {
  margin: 0 0 0.85rem;
  max-width: 28ch;
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  font-weight: 500;
  line-height: 1.35;
  opacity: 0;
  animation: riseIn 0.9s var(--ease) 0.28s forwards;
}

.hero-support {
  margin: 0 0 1.8rem;
  max-width: 42ch;
  color: rgba(247, 245, 241, 0.86);
  opacity: 0;
  animation: riseIn 0.9s var(--ease) 0.42s forwards;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  opacity: 0;
  animation: riseIn 0.9s var(--ease) 0.55s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 2.75rem;
  padding: 0.65rem 1.2rem;
  border-radius: 0.35rem;
  text-decoration: none;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), color 0.25s var(--ease);
}

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

.btn-primary {
  background: #f7f5f1;
  color: var(--ink);
}

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

.btn-ghost {
  border: 1px solid rgba(247, 245, 241, 0.55);
  color: #f7f5f1;
}

.btn-ghost:hover {
  border-color: #f7f5f1;
  color: #fff;
}

.btn-solid {
  background: var(--accent);
  color: #f7f5f1;
}

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

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

main {
  display: block;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 4.5rem 1.25rem;
}

.section-label {
  margin: 0 0 0.5rem;
  color: var(--accent-deep);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 600;
  line-height: 1.15;
}

.section-lead {
  margin: 0 0 2rem;
  max-width: 52ch;
  color: var(--ink-soft);
}

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

.channel-list li {
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--line);
}

.channel-list a {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--ink);
}

.channel-list a:hover {
  color: var(--accent-deep);
}

.channel-meta {
  margin: 0.35rem 0 0;
  color: var(--ink-soft);
  max-width: 50ch;
}

.badge {
  display: inline-block;
  margin-left: 0.45rem;
  padding: 0.1rem 0.45rem;
  border: 1px solid var(--line);
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  vertical-align: middle;
  color: var(--ink-soft);
}

.page-hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3.5rem 1.25rem 1rem;
}

.about-hero {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.about-photo {
  width: 6.5rem;
  height: 6.5rem;
  flex-shrink: 0;
  border: 1px solid var(--line);
}

.about-hero-copy {
  min-width: min(100%, 18rem);
}

.page-hero h1 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1.05;
}

.page-hero p {
  margin: 0;
  max-width: 48ch;
  color: var(--ink-soft);
}

.prose {
  max-width: 42rem;
}

.prose p + p {
  margin-top: 1rem;
}

.contact-block {
  display: grid;
  gap: 1.5rem;
}

.contact-email {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 600;
  text-decoration: none;
  color: var(--ink);
}

.contact-note {
  margin: 0;
  color: var(--ink-soft);
  max-width: 46ch;
}

.stub-note {
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
}

.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.35);
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.75rem 1.25rem 2.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.footer-inner a {
  text-decoration: none;
}

[data-lang="en"] [data-i18n-zh],
[data-lang="zh"] [data-i18n-en],
html[data-lang="en"] .zh-only,
html[data-lang="zh"] .en-only {
  display: none !important;
}

@media (max-width: 720px) {
  .nav-wrap {
    flex-wrap: wrap;
  }

  .nav-links {
    width: 100%;
    order: 3;
  }

  .hero-inner {
    padding-top: 4rem;
  }
}

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

  .hero::before {
    transform: none;
  }
}