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

:root {
  --color-ink: #1a2b2e;
  --color-ink-soft: #2c4146;
  --color-mist: #7a9aa3;
  --color-mist-light: #b8cdd3;
  --color-paper: #f3f6f4;
  --color-paper-deep: #e6ece8;
  --color-pine: #3d6b5a;
  --color-pine-hover: #2f5548;
  --color-white: #ffffff;
  --color-muted: #5a7076;
  --font-display: 'Noto Serif SC', 'Source Han Serif SC', 'Songti SC', serif;
  --font-body: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3.5rem;
  --space-2xl: 5.5rem;
  --radius-sm: 4px;
  --radius-md: 8px;
  --max-width: 1120px;
  --header-height: 4rem;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-soft: 0 12px 40px rgba(26, 43, 46, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-ink);
  background: var(--color-paper);
  -webkit-font-smoothing: antialiased;
}

.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-main {
  flex: 1;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 var(--space-md);
  color: var(--color-ink);
}

p {
  margin: 0 0 var(--space-md);
  color: var(--color-ink-soft);
}

a {
  color: var(--color-pine);
  text-decoration: none;
  transition: color 0.2s var(--ease-out);
}

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

button,
.btn {
  font-family: var(--font-body);
  cursor: pointer;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(61, 107, 90, 0.45);
  outline-offset: 3px;
}

.container {
  width: min(100% - 2.5rem, var(--max-width));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 200;
  padding: 0.5rem 0.75rem;
  color: var(--color-white);
  background: var(--color-pine);
  border-radius: var(--radius-sm);
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: translateY(0);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition:
    background 0.25s var(--ease-out),
    color 0.25s var(--ease-out),
    border-color 0.25s var(--ease-out),
    transform 0.25s var(--ease-out);
}

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

.btn-primary {
  background: var(--color-pine);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-pine-hover);
  color: var(--color-white);
}

.btn-ghost {
  background: transparent;
  color: var(--color-ink);
  border-color: rgba(26, 43, 46, 0.25);
}

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

.btn-light {
  background: rgba(243, 246, 244, 0.92);
  color: var(--color-ink);
}

.btn-light:hover {
  background: var(--color-white);
  color: var(--color-ink);
}

.page {
  flex: 1;
  padding: calc(var(--header-height) + var(--space-xl)) 0 var(--space-2xl);
}

.page-title {
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  margin-bottom: var(--space-sm);
}

.page-lead {
  max-width: 36rem;
  color: var(--color-muted);
  margin-bottom: var(--space-xl);
}

.badge {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
}

.badge-live {
  background: rgba(61, 107, 90, 0.12);
  color: var(--color-pine);
}

.badge-coming {
  background: rgba(122, 154, 163, 0.18);
  color: var(--color-mist);
}

.badge-free {
  background: rgba(198, 128, 58, 0.14);
  color: #a9622a;
}

.fade-up {
  animation: fadeUp 0.8s var(--ease-out) both;
}

.fade-up-delay {
  animation: fadeUp 0.9s var(--ease-out) 0.15s both;
}

.fade-up-delay-2 {
  animation: fadeUp 1s var(--ease-out) 0.3s both;
}

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

/* Header */
.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-height);
  transition:
    background 0.3s var(--ease-out),
    box-shadow 0.3s var(--ease-out),
    backdrop-filter 0.3s var(--ease-out);
}

.header.scrolled,
.header.open {
  background: rgba(243, 246, 244, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(26, 43, 46, 0.06);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.brand:hover { color: var(--color-ink); }

.brand-mark {
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 35%, #c5d8d4 0%, transparent 45%),
    linear-gradient(145deg, var(--color-mist) 0%, var(--color-pine) 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.25);
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  padding: 0.45rem 0.75rem;
  color: var(--color-muted);
  font-size: 0.92rem;
  border-radius: var(--radius-sm);
}

.nav-link:hover,
.nav-link.active { color: var(--color-ink); }

.nav-link.active { background: rgba(61, 107, 90, 0.08); }

.menu-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  border: none;
  background: transparent;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 1.25rem;
  height: 2px;
  background: var(--color-ink);
  transition: transform 0.25s var(--ease-out);
}

/* Home */
.home { padding: 0; }

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  padding: calc(var(--header-height) + var(--space-2xl)) 0 var(--space-2xl);
  overflow: hidden;
  color: var(--color-paper);
}

.hero-atmosphere {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(122, 154, 163, 0.35) 0%, transparent 55%),
    radial-gradient(ellipse 50% 40% at 15% 70%, rgba(61, 107, 90, 0.28) 0%, transparent 50%),
    linear-gradient(165deg, #0f1c1f 0%, #1a2b2e 42%, #243a3f 78%, #2c4a48 100%);
}

.hero-atmosphere::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(-12deg, transparent, transparent 18px, rgba(243, 246, 244, 0.015) 18px, rgba(243, 246, 244, 0.015) 19px);
  opacity: 0.9;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 40rem;
  margin-left: max(0px, calc((100% - var(--max-width)) / 2 + 1.25rem));
  margin-right: auto;
  width: min(100% - 2.5rem, 40rem);
}

.eyebrow {
  margin: 0 0 var(--space-sm);
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-mist-light);
}

.hero h1 {
  margin: 0 0 var(--space-md);
  font-size: clamp(2.8rem, 8vw, 4.6rem);
  letter-spacing: 0.12em;
  color: var(--color-paper);
  font-weight: 600;
}

.lead {
  margin: 0 0 var(--space-sm);
  font-size: clamp(1.15rem, 2.5vw, 1.45rem);
  color: rgba(243, 246, 244, 0.92);
  font-family: var(--font-display);
}

.support { margin: 0 0 var(--space-lg); color: var(--color-mist-light); max-width: 28rem; }
.cta { display: flex; flex-wrap: wrap; gap: 0.75rem; }

.strip { padding: var(--space-2xl) 0; background: var(--color-paper); }
.strip-head { display: flex; justify-content: space-between; align-items: baseline; gap: var(--space-md); margin-bottom: var(--space-lg); }
.strip-head h2 { margin: 0; font-size: 1.5rem; }
.strip-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.75rem; }
.strip-item a { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 0.75rem 1.5rem; padding: 1.15rem 1.25rem; background: var(--color-white); border: 1px solid rgba(26, 43, 46, 0.08); border-radius: var(--radius-md); color: inherit; transition: border-color 0.25s var(--ease-out), transform 0.25s var(--ease-out); }
.strip-item a:hover { border-color: rgba(61, 107, 90, 0.4); transform: translateY(-2px); color: inherit; }
.strip-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 0.65rem; }
.strip-meta strong { font-family: var(--font-display); font-size: 1.05rem; font-weight: 600; }
.strip-tag { color: var(--color-muted); font-size: 0.9rem; }

/* Products */
.grid { display: grid; gap: var(--space-lg); grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.card { display: flex; flex-direction: column; gap: 0.65rem; padding: var(--space-lg); background: var(--color-white); border: 1px solid rgba(26, 43, 46, 0.08); border-radius: var(--radius-md); color: inherit; box-shadow: var(--shadow-soft); transition: transform 0.3s var(--ease-out), border-color 0.3s var(--ease-out); height: 100%; }
.card:hover { transform: translateY(-4px); border-color: rgba(61, 107, 90, 0.35); color: inherit; }
.card-top { display: flex; justify-content: space-between; align-items: center; gap: 0.5rem; }
.badges { display: inline-flex; gap: 0.35rem; flex-wrap: wrap; justify-content: flex-end; }
.shot-grid { margin-top: var(--space-md); display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--space-md); }
.shot-grid figure { margin: 0; }
.shot-grid img { width: 100%; height: auto; display: block; border: 1px solid rgba(26, 43, 46, 0.1); border-radius: var(--radius-md); background: var(--color-white); }
.kind { font-size: 0.78rem; color: var(--color-mist); letter-spacing: 0.04em; }
.card h3 { font-size: 1.2rem; margin: 0; }
.card .tagline { margin: 0; color: var(--color-pine); font-size: 0.95rem; }
.card .summary { margin: 0; flex: 1; font-size: 0.92rem; color: var(--color-muted); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.more { margin-top: 0.5rem; font-size: 0.88rem; color: var(--color-ink); font-weight: 500; }

/* Detail */
.detail { max-width: 44rem; }
.crumb { display: flex; flex-wrap: wrap; gap: 0.4rem; font-size: 0.88rem; color: var(--color-muted); margin-bottom: var(--space-lg); }
.crumb span { color: var(--color-mist); }
.labels { display: flex; align-items: center; gap: 0.65rem; margin-bottom: var(--space-sm); }
.detail .tagline { font-family: var(--font-display); font-size: 1.15rem; color: var(--color-pine); margin-bottom: var(--space-sm); }
.detail .summary { font-size: 1.02rem; margin-bottom: 0; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: var(--space-lg) 0 var(--space-xl); }
.block { margin-bottom: var(--space-xl); padding-top: var(--space-md); border-top: 1px solid rgba(26, 43, 46, 0.08); }
.block h2 { font-size: 1.2rem; margin-bottom: var(--space-sm); }
.block ul { margin: 0; padding-left: 1.2rem; color: var(--color-ink-soft); }
.block li + li { margin-top: 0.45rem; }
.qr-wrap { margin-top: var(--space-md); display: flex; flex-direction: column; align-items: flex-start; gap: 0.75rem; }
.qr-wrap img { border: 1px solid rgba(26, 43, 46, 0.1); border-radius: var(--radius-sm); background: var(--color-white); }
.links { list-style: none; padding: 0; }

/* Download */
.list { display: grid; gap: var(--space-lg); }
.panel { background: var(--color-white); border: 1px solid rgba(26, 43, 46, 0.08); border-radius: var(--radius-md); padding: var(--space-lg); box-shadow: var(--shadow-soft); }
.panel-head { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--space-md); margin-bottom: var(--space-md); }
.panel h2 { margin: 0 0 0.4rem; font-size: 1.25rem; }
.meta { margin: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; font-size: 0.9rem; color: var(--color-muted); }
.detail-link { font-size: 0.9rem; white-space: nowrap; }
.platforms { list-style: none; margin: 0; padding: 0; }
.platforms li { display: flex; justify-content: space-between; align-items: center; gap: var(--space-md); padding: 0.9rem 0; border-top: 1px solid rgba(26, 43, 46, 0.06); }
.platforms strong { display: block; margin-bottom: 0.2rem; }
.file, .size { display: block; font-size: 0.85rem; color: var(--color-muted); }
.changelog { margin: var(--space-md) 0 0; font-size: 0.9rem; color: var(--color-muted); }
.empty { color: var(--color-muted); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

/* Activate, about, contact */
.narrow { max-width: 40rem; }
.steps { margin: 0 0 var(--space-xl); padding: 0; list-style: none; counter-reset: step; }
.steps li { position: relative; padding: 0 0 var(--space-lg) 3rem; border-left: 1px solid rgba(26, 43, 46, 0.1); margin-left: 0.85rem; }
.steps li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps li::before { counter-increment: step; content: counter(step); position: absolute; left: -0.85rem; top: 0; width: 1.7rem; height: 1.7rem; border-radius: 50%; background: var(--color-pine); color: var(--color-white); font-size: 0.85rem; display: flex; align-items: center; justify-content: center; font-weight: 600; }
.steps h2 { font-size: 1.1rem; margin: 0.15rem 0 0.4rem; }
.steps p { margin: 0; }
.notice { padding: var(--space-lg); background: var(--color-white); border: 1px solid rgba(26, 43, 46, 0.08); border-radius: var(--radius-md); }
.notice h2 { font-size: 1.15rem; margin-bottom: var(--space-sm); }
.notice .btn { margin-top: var(--space-sm); }
.prose p { font-size: 1.02rem; }
.narrow > .cta { margin-top: var(--space-lg); }
.cards { list-style: none; margin: 0 0 var(--space-lg); padding: 0; display: grid; gap: var(--space-md); }
.cards li { padding: var(--space-lg); background: var(--color-white); border: 1px solid rgba(26, 43, 46, 0.08); border-radius: var(--radius-md); }
.cards h2 { font-family: var(--font-body); font-size: 0.85rem; font-weight: 500; letter-spacing: 0.06em; color: var(--color-mist); margin: 0 0 0.5rem; }
.cards p, .cards a { margin: 0; font-family: var(--font-display); font-size: 1.15rem; color: var(--color-ink); }
.tip { font-size: 0.92rem; color: var(--color-muted); }

/* Footer */
.footer { margin-top: auto; border-top: 1px solid rgba(26, 43, 46, 0.08); background: var(--color-ink); color: var(--color-mist-light); padding: var(--space-xl) 0; }
.footer-inner { display: grid; gap: var(--space-lg); }
.footer .name { font-family: var(--font-display); font-size: 1.2rem; color: var(--color-paper); margin: 0 0 0.35rem; letter-spacing: 0.08em; }
.footer .tag { margin: 0; color: var(--color-mist); font-size: 0.9rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.75rem 1.25rem; }
.footer-links a { color: var(--color-mist-light); font-size: 0.9rem; }
.footer-links a:hover { color: var(--color-paper); }
.footer-meta { display: flex; flex-wrap: wrap; gap: 0.5rem 1.25rem; font-size: 0.8rem; color: var(--color-mist); }
.footer-meta .beian { color: inherit; text-decoration: none; }
.footer-meta .beian:hover { color: var(--color-pine); text-decoration: underline; }

@media (min-width: 768px) {
  .footer-inner { grid-template-columns: 1.2fr 1fr; align-items: start; }
  .footer-meta { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
  .menu-toggle { display: flex; }
  .nav { position: fixed; top: var(--header-height); left: 0; right: 0; flex-direction: column; align-items: stretch; padding: var(--space-md) 1.25rem var(--space-lg); background: rgba(243, 246, 244, 0.98); border-bottom: 1px solid rgba(26, 43, 46, 0.08); transform: translateY(-8px); opacity: 0; visibility: hidden; pointer-events: none; transition: opacity 0.25s var(--ease-out), transform 0.25s var(--ease-out), visibility 0.25s var(--ease-out); }
  .nav.open { opacity: 1; visibility: visible; transform: translateY(0); pointer-events: auto; }
  .nav-link { padding: 0.85rem 0.5rem; font-size: 1rem; }
}

@media (max-width: 768px) {
  .container { width: min(100% - 1.5rem, var(--max-width)); }
  .page { padding-top: calc(var(--header-height) + var(--space-lg)); }
  .hero { align-items: center; padding-bottom: var(--space-xl); }
  .hero-content { margin-left: auto; width: min(100% - 1.5rem, 40rem); }
  .hero h1 { letter-spacing: 0.08em; }
}

@media (max-width: 640px) {
  .platforms li { flex-direction: column; align-items: flex-start; }
  .panel-head { 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; }
}