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

body {
  --theme-bg-a: rgba(239, 68, 68, .22);
  --theme-bg-b: rgba(185, 28, 28, .3);
  --theme-bg-c1: #050505;
  --theme-bg-c2: #120707;
  --theme-bg-c3: #030303;
  --theme-accent: #ef4444;
  --theme-accent-soft: #fca5a5;
  --theme-border: rgba(239, 68, 68, .34);
  --theme-surface: rgba(18, 7, 7, .62);
  --theme-btn-a: rgba(220, 38, 38, .95);
  --theme-btn-b: rgba(127, 29, 29, .9);
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #ffffff;
  background:
    radial-gradient(circle at 15% 10%, var(--theme-bg-a), transparent 30%),
    radial-gradient(circle at 85% 20%, var(--theme-bg-b), transparent 34%),
    linear-gradient(135deg, var(--theme-bg-c1) 0%, var(--theme-bg-c2) 48%, var(--theme-bg-c3) 100%);
  line-height: 1.8;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.8), transparent 85%);
}

.page {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 36px 0 72px;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  border: 1px solid var(--theme-border);
  border-radius: 22px;
  background: rgba(20, 8, 8, .78);
  backdrop-filter: blur(18px);
  box-shadow: 0 18px 60px rgba(0, 0, 0, .28);
}

.logo { font-weight: 800; letter-spacing: .08em; }
.logo span { color: var(--theme-accent); text-shadow: 0 0 18px color-mix(in srgb, var(--theme-accent) 75%, transparent); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.mobile-menu-btn {
  display: none;
  border: 1px solid var(--theme-border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--theme-accent) 18%, transparent);
  color: #ffffff;
  font-size: 13px;
  font-weight: 700;
  padding: 7px 12px;
  cursor: pointer;
  transition: .2s ease;
}
.mobile-menu-btn:hover {
  background: color-mix(in srgb, var(--theme-accent) 30%, transparent);
}
.nav-links { display: flex; gap: 18px; font-size: 14px; color: #f3f4f6; }
.nav-links a {
  color: #f3f4f6;
  text-decoration: none;
  padding: 4px 8px;
  border-radius: 8px;
  transition: .2s ease;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: #ffffff;
  background: color-mix(in srgb, var(--theme-accent) 20%, transparent);
}
.theme-toggle-btn {
  border: 1px solid var(--theme-border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--theme-accent) 18%, transparent);
  color: #ffffff;
  font-size: 13px;
  font-weight: 700;
  padding: 7px 12px;
  cursor: pointer;
  transition: .2s ease;
}
.theme-toggle-btn:hover {
  background: color-mix(in srgb, var(--theme-accent) 30%, transparent);
  box-shadow: 0 0 14px color-mix(in srgb, var(--theme-accent) 30%, transparent);
}

.hero {
  display: grid;
  grid-template-columns: 1.04fr .96fr;
  gap: 32px;
  align-items: center;
  padding: 72px 0 40px;
}

.badge {
  display: inline-flex;
  margin-bottom: 20px;
  padding: 7px 13px;
  border: 1px solid var(--theme-border);
  border-radius: 999px;
  color: var(--theme-accent-soft);
  background: color-mix(in srgb, var(--theme-accent) 16%, transparent);
  font-size: 13px;
}

h1 {
  max-width: 760px;
  font-size: clamp(40px, 7vw, 76px);
  line-height: 1.08;
  letter-spacing: -.05em;
}

h1 strong { color: var(--theme-accent); text-shadow: 0 0 26px color-mix(in srgb, var(--theme-accent) 55%, transparent); }

.hero p {
  max-width: 680px;
  margin-top: 22px;
  color: #f3f4f6;
  font-size: 18px;
}

.btn-row { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.btn {
  display: inline-block;
  padding: 13px 22px;
  border-radius: 14px;
  border: 1px solid var(--theme-border);
  color: #ffffff;
  text-decoration: none;
  background: linear-gradient(135deg, var(--theme-btn-a), var(--theme-btn-b));
  box-shadow: 0 0 28px color-mix(in srgb, var(--theme-accent) 32%, transparent);
  font-weight: 700;
}
.btn.secondary { background: rgba(28, 10, 10, .66); color: #f3f4f6; box-shadow: none; }

.screen {
  position: relative;
  min-height: 460px;
  padding: 22px;
  border: 1px solid var(--theme-border);
  border-radius: 30px;
  background: linear-gradient(180deg, rgba(22, 8, 8, .92), rgba(5, 5, 5, .88));
  box-shadow: 0 28px 90px rgba(0, 0, 0, .45), inset 0 0 50px color-mix(in srgb, var(--theme-accent) 10%, transparent);
  overflow: hidden;
}

.screen::before {
  content: "";
  position: absolute;
  inset: -1px;
  background: linear-gradient(120deg, transparent, color-mix(in srgb, var(--theme-accent) 28%, transparent), transparent);
  transform: translateX(-75%);
  animation: scan 5s linear infinite;
}
@keyframes scan { to { transform: translateX(75%); } }

.screen-inner { position: relative; z-index: 1; }
.dots { display: flex; gap: 8px; margin-bottom: 18px; }
.dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--theme-accent); box-shadow: 0 0 14px color-mix(in srgb, var(--theme-accent) 90%, transparent); }

.label {
  margin: 18px 0 10px;
  color: var(--theme-accent-soft);
  font-size: 13px;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.code-line {
  display: block;
  margin: 8px 0;
  color: #ffffff;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 14px;
}
.code-line em { color: var(--theme-accent-soft); font-style: normal; }
.code-line b { color: var(--theme-accent); font-weight: 500; }

.image-text-box {
  padding: 14px;
  border-radius: 18px;
  border: 1px solid var(--theme-border);
  background: rgba(8, 4, 4, .6);
}
#textCanvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 14px;
}
.refresh-quote-btn {
  margin-top: 12px;
  width: 100%;
  border: 1px solid var(--theme-border);
  border-radius: 12px;
  padding: 10px 14px;
  background: color-mix(in srgb, var(--theme-accent) 18%, transparent);
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .03em;
  cursor: pointer;
  transition: .2s ease;
}
.refresh-quote-btn:hover {
  background: color-mix(in srgb, var(--theme-accent) 30%, transparent);
  box-shadow: 0 0 18px color-mix(in srgb, var(--theme-accent) 35%, transparent);
}

.noise-box {
  position: relative;
  min-height: 104px;
  padding: 16px;
  border-radius: 18px;
  border: 1px solid var(--theme-border);
  background: rgba(10, 4, 4, .6);
  overflow: hidden;
}
.noise-text {
  color: rgba(255, 255, 255, .75);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 14px;
  word-break: break-all;
  filter: blur(.15px);
  letter-spacing: .05em;
}
.real-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  padding: 18px;
  color: #ffffff;
  background: rgba(8, 3, 3, .94);
  opacity: 0;
  transition: .25s ease;
}
.noise-box:hover .real-text { opacity: 1; }

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 30px;
}
.card, .doc {
  border: 1px solid var(--theme-border);
  border-radius: 24px;
  background: var(--theme-surface);
  backdrop-filter: blur(14px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, .24);
}
.card { padding: 24px; }
.card h2 { margin-bottom: 10px; color: #ffffff; font-size: 22px; }
.card p, .doc p { color: #f3f4f6; }

.doc { margin-top: 22px; padding: 34px; }
.doc h2 { margin-bottom: 16px; font-size: 30px; }
.quote {
  margin-top: 20px;
  padding: 20px;
  border-left: 4px solid var(--theme-accent);
  border-radius: 16px;
  background: color-mix(in srgb, var(--theme-accent) 14%, transparent);
  color: #ffffff;
}

.friend-links {
  margin-top: 22px;
  padding: 30px 34px;
  border: 1px solid var(--theme-border);
  border-radius: 24px;
  background: var(--theme-surface);
  backdrop-filter: blur(14px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, .24);
}
.friend-links h2 {
  margin-bottom: 8px;
  font-size: 28px;
  color: #ffffff;
}
.friend-links-desc {
  color: #f3f4f6;
  margin-bottom: 16px;
}
.friend-links-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.friend-link-item {
  display: block;
  border: 1px solid var(--theme-border);
  border-radius: 12px;
  padding: 12px 14px;
  color: #ffffff;
  text-decoration: none;
  background: color-mix(in srgb, var(--theme-accent) 10%, transparent);
  transition: .2s ease;
}
.friend-link-item:hover {
  transform: translateY(-1px);
  background: color-mix(in srgb, var(--theme-accent) 20%, transparent);
  box-shadow: 0 0 16px color-mix(in srgb, var(--theme-accent) 25%, transparent);
}
.friend-link-item small {
  display: block;
  margin-top: 4px;
  color: var(--theme-accent-soft);
  font-size: 12px;
}

.footer { margin-top: 36px; text-align: center; color: #e5e7eb; font-size: 14px; }

.simple-page {
  margin-top: 20px;
  padding: 30px 34px;
  border: 1px solid var(--theme-border);
  border-radius: 24px;
  background: var(--theme-surface);
  box-shadow: 0 18px 48px rgba(0, 0, 0, .24);
}
.simple-page h1 {
  font-size: clamp(30px, 5vw, 48px);
  margin-bottom: 10px;
}
.simple-page p {
  color: #f3f4f6;
  margin: 10px 0;
}
.simple-list {
  margin-top: 10px;
  color: #f3f4f6;
}
.simple-list li { margin: 6px 0; }

@media (max-width: 860px) {
  .hero, .cards { grid-template-columns: 1fr; }
  .mobile-menu-btn { display: inline-flex; align-items: center; justify-content: center; }
  .nav { position: relative; }
  .nav-links { display: none; }
  .nav.menu-open .nav-links {
    position: absolute;
    top: calc(100% + 10px);
    right: 12px;
    left: 12px;
    z-index: 30;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 12px;
    border: 1px solid var(--theme-border);
    border-radius: 14px;
    background: rgba(12, 12, 12, .96);
    backdrop-filter: blur(14px);
  }
  .nav.menu-open .nav-links a {
    padding: 8px 10px;
  }
  .theme-toggle-btn { padding: 6px 11px; font-size: 12px; }
  .friend-links-grid { grid-template-columns: 1fr; }
}