:root {
  color-scheme: light;
  --bg: #eef3f9;
  --panel: rgba(255, 255, 255, 0.94);
  --panel-alt: #f6f9fc;
  --line: #d7e1ee;
  --text: #1f2937;
  --muted: #5f6f82;
  --primary: #1f6feb;
  --primary-dark: #164fa9;
  --accent: #14b8a6;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(20, 184, 166, 0.12), transparent 28%),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
  color: var(--text);
}

a {
  color: inherit;
}

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

button,
input {
  font: inherit;
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 48px;
}

.topbar,
.panel {
  background: var(--panel);
  border: 1px solid rgba(215, 225, 238, 0.9);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  padding: 28px 32px;
}

.eyebrow,
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
  font-weight: 700;
}

.topbar h1,
.section-head h2,
.hero-copy h2 {
  margin: 0;
  line-height: 1.15;
}

.topbar h1 {
  font-size: clamp(28px, 4vw, 40px);
}

.subtitle,
.section-head p,
.hero-copy p,
.helper-text,
.ad-copy em {
  color: var(--muted);
}

.subtitle {
  margin: 12px 0 0;
  max-width: 720px;
  line-height: 1.7;
}

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.quick-links a,
.download-links a,
.nav-card,
.generate-btn,
.copy-btn,
.ad-dot {
  transition: 0.2s ease;
}

.quick-links a,
.download-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid var(--line);
  color: var(--text);
  background: #fff;
}

.quick-links .primary-link,
.nav-card-primary {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

.quick-links a:hover,
.download-links a:hover,
.nav-card:hover,
.ad-slide:hover {
  transform: translateY(-1px);
  border-color: rgba(31, 111, 235, 0.35);
  box-shadow: 0 10px 24px rgba(31, 111, 235, 0.12);
}

.main-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 20px;
  margin-top: 22px;
}

.panel {
  padding: 28px;
}

.hero-panel {
  grid-column: span 12;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 18px;
  background:
    linear-gradient(135deg, rgba(31, 111, 235, 0.06), rgba(20, 184, 166, 0.08)),
    rgba(255, 255, 255, 0.95);
}

.tool-panel {
  grid-column: span 7;
}

.ad-panel,
.support-panel {
  grid-column: span 5;
}

.media-panel {
  grid-column: span 7;
}

.hero-copy p,
.section-head p {
  margin: 12px 0 0;
  line-height: 1.7;
}

.hero-side {
  display: grid;
  gap: 12px;
}

.status-card,
.nav-card,
.output-item,
.video-wrapper,
.qr-card,
.ad-carousel {
  background: var(--panel-alt);
  border: 1px solid var(--line);
  border-radius: 20px;
}

.status-card {
  padding: 18px 20px;
}

.status-card span,
.output-head span,
.qr-card figcaption,
.ad-copy span {
  display: block;
  font-size: 13px;
  color: var(--muted);
}

.status-card strong {
  display: block;
  margin-top: 6px;
  font-size: 18px;
}

.section-head {
  margin-bottom: 20px;
}

.input-group {
  margin-bottom: 16px;
}

.input-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
}

.input-group input {
  width: 100%;
  min-height: 50px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  font-size: 15px;
  color: var(--text);
}

.input-group input:focus {
  outline: none;
  border-color: rgba(31, 111, 235, 0.5);
  box-shadow: 0 0 0 4px rgba(31, 111, 235, 0.08);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 6px;
}

.generate-btn {
  min-height: 48px;
  padding: 0 24px;
  border: 0;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-weight: 700;
  cursor: pointer;
}

.generate-btn:hover,
.copy-btn:hover,
.ad-dot:hover {
  transform: translateY(-1px);
}

.output-group {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.output-item {
  padding: 16px;
}

.output-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.copy-btn {
  min-height: 34px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  cursor: pointer;
  color: var(--text);
}

.output-text {
  padding: 14px 16px;
  border-radius: 14px;
  background: #fff;
  font-family: Consolas, "Courier New", monospace;
  word-break: break-all;
  line-height: 1.6;
}

.ad-panel {
  display: flex;
  flex-direction: column;
}

.ad-carousel {
  position: relative;
  min-height: 560px;
  overflow: hidden;
}

.ad-slide {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  text-decoration: none;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.45s ease;
}

.ad-slide.is-active {
  opacity: 1;
  pointer-events: auto;
}

.ad-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ad-copy {
  display: grid;
  gap: 8px;
  padding: 18px 20px 20px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(255, 255, 255, 0.98));
}

.ad-copy strong {
  font-size: 22px;
}

.ad-copy em {
  font-style: normal;
  line-height: 1.6;
}

.ad-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 16px;
}

.ad-dot {
  width: 12px;
  height: 12px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: #c7d6ea;
  cursor: pointer;
}

.ad-dot.is-active {
  width: 30px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

.video-wrapper {
  padding: 12px;
}

.video-wrapper video {
  width: 100%;
  border-radius: 14px;
  background: #000;
}

.download-links {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.support-grid {
  display: grid;
  gap: 18px;
}

.qr-card {
  margin: 0;
  padding: 18px;
  text-align: center;
}

.qr-card img {
  width: min(100%, 260px);
  margin: 0 auto;
  border-radius: 18px;
}

.qr-card figcaption {
  margin-top: 12px;
}

.link-card-list {
  display: grid;
  gap: 12px;
}

.nav-card {
  display: block;
  padding: 18px 20px;
  text-decoration: none;
}

.nav-card strong {
  display: block;
  font-size: 17px;
}

.nav-card span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  line-height: 1.6;
}

.nav-card-primary span {
  color: rgba(255, 255, 255, 0.86);
}

@media (max-width: 980px) {
  .topbar,
  .hero-panel {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: stretch;
  }

  .tool-panel,
  .ad-panel,
  .media-panel,
  .support-panel {
    grid-column: span 12;
  }

  .ad-carousel {
    min-height: 420px;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 20px, 1180px);
    padding: 20px 0 32px;
  }

  .topbar,
  .panel {
    padding: 20px;
  }

  .quick-links,
  .actions {
    flex-direction: column;
    align-items: stretch;
  }

  .quick-links a,
  .generate-btn {
    width: 100%;
  }

  .ad-carousel {
    min-height: 320px;
  }
}