/* ════════════════════════════════════════════
   CryoClaw Landing — 基于 shared/design-tokens.css
   冰蓝 TraeWork 体系：token 引用，无硬编码主题色
   ════════════════════════════════════════════ */

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--accent-subtle); color: var(--accent-hover); }

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

/* ── 按钮 ── */
.btn {
  display: inline-flex; align-items: center; gap: var(--spacer-8);
  font-weight: 600; border-radius: var(--radius-pill);
  transition: transform var(--duration-normal) var(--ease-spring),
              box-shadow var(--duration-normal) var(--ease-out),
              background var(--duration-fast) ease;
  cursor: pointer; border: none; white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn--sm { padding: var(--spacer-6) var(--spacer-16); font-size: var(--text-sm); }
.btn--lg { padding: var(--spacer-12) var(--spacer-24); font-size: var(--text-base); }
.btn--primary {
  background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
  color: #fff;
  box-shadow: 0 4px 16px var(--accent-glow), 0 1px 2px rgba(15,23,42,.1);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--accent-glow), 0 2px 4px rgba(15,23,42,.12);
}
.btn--ghost {
  background: var(--glass-sm); color: var(--text);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
}
.btn--ghost:hover { background: var(--glass-md); transform: translateY(-2px); }

/* ── 导航 ── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; gap: var(--spacer-24);
  padding: var(--spacer-12) var(--spacer-32);
  background: transparent;
  transition: background var(--duration-normal) ease,
              box-shadow var(--duration-normal) ease,
              backdrop-filter var(--duration-normal) ease;
}
.nav.is-scrolled {
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(16px) saturate(1.4);
  box-shadow: 0 1px 0 var(--glass-border);
}
.nav__brand { display: flex; align-items: center; gap: var(--spacer-10); }
.nav__logo { width: 28px; height: 28px; border-radius: var(--radius-8); }
.nav__name { font-weight: 700; font-size: var(--heading-sm); color: var(--text-strong); }
.nav__tag {
  font-family: var(--font-meta); font-size: var(--font-size-meta);
  color: var(--text-muted); margin-top: var(--spacer-4);
}
.nav__links { display: flex; gap: var(--spacer-24); margin-left: auto; }
.nav__links a {
  font-size: var(--text-sm); color: var(--text-secondary);
  transition: color var(--duration-fast) ease; position: relative;
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -4px;
  height: 2px; border-radius: 2px; background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--duration-normal) var(--ease-out);
}
.nav__links a:hover { color: var(--text-strong); }
.nav__links a:hover::after { transform: scaleX(1); }

/* ── Hero ── */
.hero {
  position: relative; min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 120px var(--spacer-32) var(--spacer-48);
  overflow: hidden;
}
.hero__aurora { position: absolute; inset: 0; pointer-events: none; }
.aurora {
  position: absolute; border-radius: 50%;
  filter: blur(90px); opacity: .5;
  animation: aurora-drift 18s var(--ease-in-out) infinite alternate;
}
.aurora--1 {
  width: 560px; height: 560px; top: -160px; right: -80px;
  background: radial-gradient(circle, var(--brand-300), transparent 65%);
}
.aurora--2 {
  width: 480px; height: 480px; bottom: -120px; left: -120px;
  background: radial-gradient(circle, var(--brand-200), transparent 65%);
  animation-delay: -6s;
}
.aurora--3 {
  width: 380px; height: 380px; top: 34%; left: 38%;
  background: radial-gradient(circle, var(--accent-glow), transparent 65%);
  animation-delay: -12s;
}
@keyframes aurora-drift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(48px, -36px) scale(1.12); }
}
.hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--glass-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--glass-border) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 40%, black 20%, transparent 75%);
  opacity: .5;
}

.hero__inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.05fr 1fr;
  gap: var(--spacer-64); align-items: center;
  max-width: 1200px; margin: 0 auto; width: 100%;
}
.hero__badge {
  display: inline-flex; align-items: center; gap: var(--spacer-8);
  padding: var(--spacer-6) var(--spacer-12);
  border-radius: var(--radius-pill);
  background: var(--accent-subtle); color: var(--accent-hover);
  font-family: var(--font-meta); font-size: var(--text-xs); font-weight: 600;
  border: 1px solid var(--accent-glow);
  margin-bottom: var(--spacer-24);
}
.pulse-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--ok);
  animation: pulse 2s ease infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--ok-subtle); }
  50% { box-shadow: 0 0 0 6px var(--ok-subtle); }
}
.hero__title {
  font-family: var(--font-display);
  font-size: clamp(40px, 5.6vw, 68px);
  font-weight: 800; letter-spacing: -0.03em; line-height: 1.08;
  color: var(--text-strong);
  margin-bottom: var(--spacer-20);
}
.hero__title em {
  font-style: normal;
  background: linear-gradient(120deg, var(--brand-400), var(--brand-600));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero__sub {
  font-size: var(--text-lg); color: var(--text-secondary);
  line-height: 1.7; margin-bottom: var(--spacer-32);
}
.hero__cta { display: flex; gap: var(--spacer-12); flex-wrap: wrap; margin-bottom: var(--spacer-20); }
.hero__meta {
  font-family: var(--font-meta); font-size: var(--text-xs);
  color: var(--text-muted); display: flex; gap: var(--spacer-10); align-items: center;
}
.hero__meta i { font-style: normal; opacity: .5; }

/* ── 应用 mock ── */
.hero__mock { position: relative; }
.hero__glow {
  position: absolute; inset: 8% -6%;
  background: radial-gradient(ellipse at center, var(--accent-glow), transparent 70%);
  filter: blur(40px); z-index: -1;
  animation: glow-breathe 5s var(--ease-in-out) infinite alternate;
}
@keyframes glow-breathe { from { opacity: .6; } to { opacity: 1; } }

.mock-window {
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-16);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  transform: perspective(1400px) rotateY(-7deg) rotateX(2.5deg);
  transition: transform .7s var(--ease-out);
}
.hero__mock:hover .mock-window {
  transform: perspective(1400px) rotateY(-2deg) rotateX(.5deg);
}
.mock-window__bar {
  display: flex; align-items: center; gap: var(--spacer-6);
  padding: var(--spacer-10) var(--spacer-16);
  border-bottom: 1px solid var(--glass-border);
  background: var(--glass-xs);
}
.mock-dot { width: 11px; height: 11px; border-radius: 50%; background: var(--grey-300); }
[data-theme=dark] .mock-dot { background: var(--grey-700); }
.mock-window__title {
  margin-left: var(--spacer-12);
  font-family: var(--font-meta); font-size: var(--text-xs); color: var(--text-muted);
}
.mock-body { display: grid; grid-template-columns: 128px 1fr; min-height: 320px; }
.mock-sidebar {
  border-right: 1px solid var(--glass-border);
  padding: var(--spacer-12) var(--spacer-8);
  display: flex; flex-direction: column; gap: var(--spacer-4);
  background: var(--bg-secondary);
}
.mock-sidebar__item {
  display: flex; align-items: center; gap: var(--spacer-8);
  font-size: var(--text-xs); color: var(--text-secondary);
  padding: var(--spacer-8) var(--spacer-10);
  border-radius: var(--radius-8);
}
.mock-sidebar__item.is-active {
  background: var(--accent-subtle); color: var(--accent-hover); font-weight: 600;
}
.mock-ico { font-size: 13px; }
.mock-chat {
  padding: var(--spacer-16); display: flex; flex-direction: column; gap: var(--spacer-12);
}
.mock-msg {
  max-width: 88%; padding: var(--spacer-10) var(--spacer-12);
  border-radius: var(--radius-12); font-size: var(--text-sm); line-height: 1.65;
  animation: msg-rise .5s var(--ease-out) both;
}
.mock-msg--user {
  align-self: flex-end;
  background: linear-gradient(135deg, var(--brand-500), var(--brand-600));
  color: #fff; border-bottom-right-radius: var(--radius-4);
}
.mock-msg--ai {
  align-self: flex-start;
  background: var(--bg-secondary); border: 1px solid var(--glass-border);
  border-bottom-left-radius: var(--radius-4);
  min-height: 96px; width: 88%;
}
@keyframes msg-rise {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
.caret {
  display: inline-block; width: 7px; height: 15px;
  background: var(--accent); border-radius: 2px;
  vertical-align: -2px; margin-left: 2px;
  animation: caret-blink 1s steps(2) infinite;
}
@keyframes caret-blink { 50% { opacity: 0; } }
.mock-composer {
  margin-top: auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--spacer-10) var(--spacer-12);
  border: 1px solid var(--glass-border); border-radius: var(--radius-12);
  background: var(--bg-secondary);
}
.mock-composer__placeholder { font-size: var(--text-xs); color: var(--text-muted); }
.mock-composer__send {
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--accent); color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700;
}

/* ── 统计条 ── */
.stats {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: var(--spacer-16);
  max-width: 1200px; margin: var(--spacer-64) auto 0; width: 100%;
}
.stat {
  text-align: center; padding: var(--spacer-20) var(--spacer-12);
  border: 1px solid var(--glass-border); border-radius: var(--radius-16);
  background: var(--glass-xs); backdrop-filter: blur(8px);
  transition: transform var(--duration-normal) var(--ease-spring),
              border-color var(--duration-normal) ease;
}
.stat:hover { transform: translateY(-3px); border-color: var(--accent-glow); }
.stat__num {
  display: block; font-family: var(--font-display);
  font-size: var(--heading-3xl); font-weight: 800; letter-spacing: -0.02em;
  background: linear-gradient(120deg, var(--brand-400), var(--brand-600));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat__label { font-size: var(--text-xs); color: var(--text-muted); }

/* ── 通用 section ── */
.section { padding: 110px var(--spacer-32); max-width: 1200px; margin: 0 auto; }
.section--alt {
  max-width: none;
  background: var(--bg-secondary);
  border-top: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
}
.section--alt > * { max-width: 1080px; margin-left: auto; margin-right: auto; }
.section__head { text-align: center; margin-bottom: var(--spacer-64); }
.section__eyebrow {
  font-family: var(--font-meta); font-size: var(--text-xs); font-weight: 700;
  letter-spacing: .18em; color: var(--accent);
}
.section__title {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.4vw, 42px); font-weight: 800;
  letter-spacing: -0.02em; color: var(--text-strong);
  margin: var(--spacer-12) 0 var(--spacer-16);
}
.section__sub { color: var(--text-secondary); font-size: var(--text-lg); line-height: 1.7; }

/* ── 特性网格 ── */
.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacer-20);
}
.feature-card {
  padding: var(--spacer-24);
  border: 1px solid var(--glass-border); border-radius: var(--radius-16);
  background: var(--bg-elevated);
  transition: transform var(--duration-normal) var(--ease-spring),
              box-shadow var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) ease;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent-glow);
}
.feature-card__icon {
  width: 40px; height: 40px; border-radius: var(--radius-10);
  background: var(--accent-subtle); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--spacer-16);
  transition: transform var(--duration-normal) var(--ease-spring);
}
.feature-card:hover .feature-card__icon { transform: scale(1.1) rotate(-4deg); }
.feature-card__icon svg { width: 20px; height: 20px; }
.feature-card h3 {
  font-size: var(--heading-sm); font-weight: 700;
  color: var(--text-strong); margin-bottom: var(--spacer-8);
}
.feature-card p { font-size: var(--text-sm); color: var(--text-secondary); line-height: 1.7; }

/* ── 对比表 ── */
.compare {
  border: 1px solid var(--glass-border); border-radius: var(--radius-16);
  overflow: hidden; background: var(--bg-elevated);
  box-shadow: var(--shadow-md);
}
.compare__row {
  display: grid; grid-template-columns: 1fr 1.4fr 1.8fr;
  gap: var(--spacer-16); padding: var(--spacer-16) var(--spacer-24);
  border-bottom: 1px solid var(--glass-border);
  font-size: var(--text-sm); align-items: center;
  transition: background var(--duration-fast) ease;
}
.compare__row:last-child { border-bottom: none; }
.compare__row:not(.compare__row--head):hover { background: var(--glass-xs); }
.compare__row--head {
  font-family: var(--font-meta); font-size: var(--text-xs); font-weight: 700;
  color: var(--text-muted); letter-spacing: .08em;
  background: var(--glass-xs);
}
.compare__row > span:first-child { color: var(--text-strong); font-weight: 600; }
.compare__row > span:nth-child(2) { color: var(--text-muted); }
.compare__hl { color: var(--accent-hover); font-weight: 600; }
[data-theme=dark] .compare__hl { color: var(--accent); }

/* ── 提供商跑马灯 ── */
.provider-marquee {
  overflow: hidden; position: relative;
  mask-image: linear-gradient(90deg, transparent, black 12%, black 88%, transparent);
}
.provider-track {
  display: flex; gap: var(--spacer-16); width: max-content;
  animation: marquee 26s linear infinite;
}
.provider-marquee:hover .provider-track { animation-play-state: paused; }
@keyframes marquee { to { transform: translateX(-50%); } }
.provider-chip {
  padding: var(--spacer-12) var(--spacer-24);
  border-radius: var(--radius-pill);
  border: 1px solid var(--glass-border);
  background: var(--bg-elevated);
  font-family: var(--font-display); font-weight: 600; font-size: var(--text-base);
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
  transition: color var(--duration-fast) ease, border-color var(--duration-fast) ease;
  white-space: nowrap;
}
.provider-chip:hover { color: var(--accent-hover); border-color: var(--accent-glow); }

/* ── 下载 CTA ── */
.section--cta { padding-bottom: 130px; }
.cta-card {
  position: relative; text-align: center;
  padding: var(--spacer-64) var(--spacer-32);
  border-radius: var(--radius-24);
  border: 1px solid var(--glass-border);
  background:
    radial-gradient(ellipse 70% 90% at 50% -10%, var(--accent-subtle), transparent 65%),
    var(--bg-elevated);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
}
.cta-card__glow {
  position: absolute; inset: -40% 20% auto;
  height: 420px;
  background: radial-gradient(ellipse, var(--accent-glow), transparent 70%);
  filter: blur(50px); pointer-events: none;
  animation: glow-breathe 6s var(--ease-in-out) infinite alternate;
}
.cta-card__logo {
  width: 72px; height: 72px; border-radius: var(--radius-20);
  box-shadow: var(--shadow-lg); margin-bottom: var(--spacer-24);
  animation: float 5s var(--ease-in-out) infinite alternate;
}
@keyframes float { from { transform: translateY(0); } to { transform: translateY(-8px); } }
.cta-card h2 {
  font-family: var(--font-display); font-size: var(--heading-3xl);
  font-weight: 800; letter-spacing: -0.02em; color: var(--text-strong);
  margin-bottom: var(--spacer-16);
}
.cta-card p { color: var(--text-secondary); line-height: 1.8; margin-bottom: var(--spacer-32); }
.cta-card__actions {
  display: flex; gap: var(--spacer-12); justify-content: center;
  flex-wrap: wrap; margin-bottom: var(--spacer-20);
}
.cta-card__meta {
  font-family: var(--font-meta); font-size: var(--text-xs); color: var(--text-muted);
  display: flex; gap: var(--spacer-10); justify-content: center;
}
.cta-card__meta i { font-style: normal; opacity: .5; }

/* ── 页脚 ── */
.footer {
  border-top: 1px solid var(--glass-border);
  background: var(--bg-secondary);
  padding: var(--spacer-48) var(--spacer-32) var(--spacer-32);
}
.footer__inner {
  max-width: 1200px; margin: 0 auto var(--spacer-32);
  display: flex; justify-content: space-between; align-items: center;
  gap: var(--spacer-24); flex-wrap: wrap;
}
.footer__brand { display: flex; align-items: center; gap: var(--spacer-12); }
.footer__logo { width: 36px; height: 36px; border-radius: var(--radius-10); }
.footer__name { font-weight: 700; color: var(--text-strong); }
.footer__slogan { font-size: var(--text-xs); color: var(--text-muted); }
.footer__links { display: flex; gap: var(--spacer-24); flex-wrap: wrap; }
.footer__links a {
  font-size: var(--text-sm); color: var(--text-secondary);
  transition: color var(--duration-fast) ease;
}
.footer__links a:hover { color: var(--accent-hover); }
.footer__copy {
  max-width: 1200px; margin: 0 auto;
  font-family: var(--font-meta); font-size: var(--text-xs);
  color: var(--text-faint); text-align: center;
}

/* ── 入场 reveal ── */
.reveal {
  opacity: 0; transform: translateY(26px);
  transition: opacity .7s var(--ease-out) var(--d, 0s),
              transform .7s var(--ease-out) var(--d, 0s);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ── 响应式 ── */
@media (max-width: 960px) {
  .hero__inner { grid-template-columns: 1fr; gap: var(--spacer-48); }
  .hero__mock { max-width: 560px; margin: 0 auto; width: 100%; }
  .mock-window { transform: none; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .nav__links { display: none; }
}
@media (max-width: 620px) {
  .feature-grid { grid-template-columns: 1fr; }
  .compare__row { grid-template-columns: 1fr; gap: var(--spacer-6); }
  .hero { padding-top: 96px; }
  .section { padding: 72px var(--spacer-20); }
}

/* ── 减弱动效偏好 ── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .aurora, .hero__glow, .cta-card__glow, .cta-card__logo,
  .provider-track, .caret, .pulse-dot { animation: none !important; }
  .mock-window, .feature-card, .stat, .btn { transition: none; }
}