/* ============ HotKit landing page ============ */

/* 配色取自 logo：海军蓝键帽底 (#0f172a/#1e293b) + 闪电渐变 (#fde047→#fb923c→#dc2626) */
:root {
  --bg: #0b1120;
  --bg-alt: #0f172a;
  --card: #141d31;
  --border: #283755;
  --text: #eaf0f9;
  --text-dim: #9aa7bf;
  --accent: #fb923c;
  --accent-2: #fde047;
  --grad: linear-gradient(115deg, #fde047, #fb923c 55%, #dc2626);
  --radius: 14px;
  --maxw: 1080px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, "Segoe UI", system-ui, Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; }

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

/* ============ Header ============ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(11, 17, 32, 0.8);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  font-size: 22px;
  font-weight: 800;
}

.logo img { display: block; margin-right: 10px; }

.logo span {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  gap: 24px;
  margin-left: auto;
}

.nav-links a {
  color: var(--text-dim);
  font-size: 15px;
  transition: color 0.15s;
}

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

.lang-toggle {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text-dim);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

.lang-toggle:hover {
  color: var(--text);
  border-color: var(--accent);
}

/* ============ Buttons ============ */

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  white-space: nowrap;
  transition: transform 0.12s, box-shadow 0.12s, background 0.15s;
}

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

.btn-primary {
  background: var(--grad);
  color: #1c1005;
  box-shadow: 0 4px 24px rgba(251, 146, 60, 0.35);
}

.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
  background: transparent;
}

.btn-ghost:hover { background: rgba(255, 255, 255, 0.05); }

.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-lg { padding: 16px 40px; font-size: 18px; }
.btn-block { display: block; text-align: center; }

/* ============ Hero ============ */

.hero {
  position: relative;
  overflow: hidden;
  padding: 110px 0 90px;
  text-align: center;
  background:
    radial-gradient(600px 300px at 50% -50px, rgba(251, 146, 60, 0.16), transparent),
    radial-gradient(500px 280px at 80% 10%, rgba(253, 224, 71, 0.07), transparent);
}

/* 速度光带：两道斜向掠过的细线，呼应闪电 logo */
.hero::before,
.hero::after {
  content: "";
  position: absolute;
  height: 2px;
  pointer-events: none;
}

.hero::before {
  top: 22%;
  right: -80px;
  width: 440px;
  background: linear-gradient(90deg, transparent, rgba(251, 146, 60, 0.55));
  transform: rotate(-16deg);
}

.hero::after {
  bottom: 26%;
  left: -100px;
  width: 380px;
  background: linear-gradient(90deg, rgba(253, 224, 71, 0.4), transparent);
  transform: rotate(-16deg);
}

.badge {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  color: var(--accent-2);
  margin-bottom: 28px;
  background: rgba(253, 224, 71, 0.06);
}

.hero h1 {
  font-size: clamp(38px, 6vw, 60px);
  font-weight: 800;
}

/* 标题高亮词向前倾，配合闪电主题的速度感 */
.grad {
  display: inline-block;
  transform: skewX(-7deg);
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero .sub {
  max-width: 640px;
  margin: 24px auto 36px;
  font-size: 18px;
  color: var(--text-dim);
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-note {
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-dim);
}

/* 硬指标数字带：快、小、轻的直接证据 */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px clamp(32px, 7vw, 72px);
  margin-top: 44px;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-num {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-num small {
  font-size: 16px;
  font-weight: 700;
}

.stat-label {
  font-size: 13px;
  color: var(--text-dim);
}

/* 快节奏的交错入场 */
@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

.hero .badge,
.hero h1,
.hero .sub,
.hero-cta,
.hero-stats,
.hero > .container > .hero-note {
  animation: rise 0.4s ease-out backwards;
}

.hero h1 { animation-delay: 0.05s; }
.hero .sub { animation-delay: 0.1s; }
.hero-cta { animation-delay: 0.15s; }
.hero-stats { animation-delay: 0.2s; }
.hero > .container > .hero-note { animation-delay: 0.25s; }

@media (prefers-reduced-motion: reduce) {
  .hero .badge,
  .hero h1,
  .hero .sub,
  .hero-cta,
  .hero-stats,
  .hero > .container > .hero-note {
    animation: none;
  }
}

/* ============ Sections ============ */

.section { padding: 90px 0; }

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

.section h2 {
  font-size: clamp(28px, 4vw, 38px);
  text-align: center;
}

.section-sub {
  text-align: center;
  color: var(--text-dim);
  margin: 14px auto 48px;
  max-width: 560px;
}

.center { text-align: center; }

/* ============ Features ============ */

.grid { display: grid; gap: 20px; }

.features-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.15s, transform 0.15s;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card-icon { font-size: 28px; margin-bottom: 14px; }

.card h3 { font-size: 18px; margin-bottom: 10px; }

.card p { font-size: 15px; color: var(--text-dim); }

.card-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  transition: color 0.15s;
}

.card-link:hover { color: var(--accent-2); }

/* ============ Screenshots ============ */

.shots-grid {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.shot { margin: 0; }

.shot img,
.shot-placeholder {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: block;
}

.shot img { object-fit: cover; }

.shot-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    repeating-linear-gradient(45deg, transparent, transparent 12px,
      rgba(255, 255, 255, 0.02) 12px, rgba(255, 255, 255, 0.02) 24px),
    var(--card);
  color: var(--text-dim);
  font-size: 14px;
}

.shot figcaption {
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-dim);
  text-align: center;
}

/* ============ Pricing ============ */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.price-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
}

.price-card-featured {
  border-color: var(--accent);
  box-shadow: 0 8px 40px rgba(251, 146, 60, 0.18);
}

.ribbon {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--grad);
  color: #1c1005;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  white-space: nowrap;
}

.price-card h3 { font-size: 20px; }

.price-desc {
  color: var(--text-dim);
  font-size: 14px;
  margin: 8px 0 22px;
}

.price-line {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 24px;
}

.price-old {
  font-size: 20px;
  color: var(--text-dim);
  text-decoration: line-through;
}

.price-now {
  font-size: 44px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.price-unit { color: var(--text-dim); font-size: 15px; }

.price-feats {
  list-style: none;
  margin-bottom: 28px;
  flex: 1;
}

.price-feats li {
  padding: 6px 0 6px 26px;
  position: relative;
  font-size: 15px;
  color: var(--text-dim);
}

.price-feats li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent-2);
  font-weight: 700;
}

.price-note {
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
  margin-top: 28px;
}

/* ============ Sub-pages (changelog / privacy) ============ */

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 72px 24px 96px;
}

.page h1 { font-size: clamp(30px, 5vw, 40px); }

.page-sub {
  color: var(--text-dim);
  font-size: 14px;
  margin: 10px 0 44px;
}

.prose h2 {
  font-size: 21px;
  margin: 38px 0 12px;
}

.prose p,
.prose li {
  font-size: 15px;
  color: var(--text-dim);
}

.prose ul {
  padding-left: 22px;
  margin: 10px 0;
}

.prose li { margin: 6px 0; }

.prose a {
  color: var(--accent);
  transition: color 0.15s;
}

.prose a:hover { color: var(--accent-2); }

.log-entry {
  border-left: 2px solid var(--border);
  padding-left: 22px;
  margin: 32px 0;
}

.log-entry h2 { font-size: 20px; margin-bottom: 10px; }

.log-date {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-dim);
  margin-left: 10px;
}

.log-entry ul { padding-left: 20px; }

.log-entry li {
  font-size: 15px;
  color: var(--text-dim);
  margin: 6px 0;
}

/* ============ Footer ============ */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--text-dim);
  font-size: 14px;
}

.footer-links { display: flex; gap: 20px; }

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

/* ============ Responsive ============ */

@media (max-width: 640px) {
  .nav-links { display: none; }
  .lang-toggle { margin-left: auto; }
  .hero { padding: 70px 0 60px; }
  .section { padding: 60px 0; }
}