/* 基础样式与配色：偏二次元感的清爽深色+亮色点缀 */
:root {
  --bg-body: #050816;
  --bg-elevated: #0b1220;
  --bg-elevated-alt: #0f172a;
  --accent: #f97316;
  --accent-soft: rgba(249, 115, 22, 0.15);
  --accent-strong: #fb923c;
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --border-subtle: rgba(148, 163, 184, 0.3);
  --radius-lg: 14px;
  --radius-md: 10px;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.85);
}

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

html, body {
  margin: 0;
  padding: 0;
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans","PingFang SC","Microsoft YaHei",sans-serif;
  background: radial-gradient(circle at top, #020617 0, #020617 40%, #020617 100%);
  color: var(--text-main);
}

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

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

a:hover {
  color: var(--accent-strong);
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 16px;
}

/* 头部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(18px);
  background: linear-gradient(to bottom, rgba(2, 6, 23, 0.95), rgba(15, 23, 42, 0.8));
  border-bottom: 1px solid rgba(148, 163, 184, 0.35);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}

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

.logo-main {
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 18px;
}

.logo-sub {
  font-size: 11px;
  color: var(--text-muted);
}

.main-nav {
  display: flex;
  gap: 16px;
  font-size: 14px;
}

.main-nav a {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--text-muted);
  transition: all 0.18s ease-out;
}

.main-nav a:hover {
  color: var(--text-main);
  border-color: var(--border-subtle);
  background: rgba(15, 23, 42, 0.8);
}

.main-nav a.active {
  border-color: rgba(249, 115, 22, 0.65);
  background: radial-gradient(circle at top left, rgba(249, 115, 22, 0.2), rgba(15, 23, 42, 0.9));
  color: #fef3c7;
}

/* 首页 Hero 区 */
.hero {
  padding: 40px 0 32px;
  background: radial-gradient(circle at top left, rgba(249, 115, 22, 0.18), transparent 55%);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.4fr);
  gap: 32px;
  align-items: center;
}

.hero-text h1 {
  font-size: 28px;
  line-height: 1.25;
  margin: 0 0 16px;
}

.hero-text p {
  margin: 0 0 16px;
  color: var(--text-muted);
  font-size: 14px;
}

.hero-points {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  font-size: 14px;
  color: var(--text-main);
}

.hero-points li + li {
  margin-top: 6px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 9px 18px;
  font-size: 14px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.18s ease-out;
  white-space: nowrap;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #111827;
  box-shadow: 0 12px 28px rgba(248, 113, 22, 0.45);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 32px rgba(248, 113, 22, 0.55);
}

.btn.ghost {
  border-color: var(--border-subtle);
  background: rgba(15, 23, 42, 0.8);
  color: var(--text-main);
}

.btn.ghost:hover {
  border-color: rgba(248, 113, 22, 0.6);
}

.btn.text {
  padding-left: 0;
  padding-right: 0;
  border: none;
  color: var(--accent-strong);
  box-shadow: none;
}

.hero-meta {
  font-size: 12px;
  color: var(--text-muted);
}

.hero-image {
  border-radius: 24px;
  padding: 10px;
  background: radial-gradient(circle at top, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.95));
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(148, 163, 184, 0.4);
}

.hero-image img {
  border-radius: 18px;
  object-fit: cover;
  height: 260px;
  width: 100%;
}

/* 通用区块 */
.section {
  padding: 32px 0;
}

.section-alt {
  background: radial-gradient(circle at top right, rgba(15, 23, 42, 1), #020617);
}

.section-title {
  margin: 0 0 20px;
  font-size: 20px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  background: radial-gradient(circle at top, rgba(15, 23, 42, 1), #020617);
  border-radius: var(--radius-lg);
  padding: 18px 16px 16px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.8);
  font-size: 14px;
  color: var(--text-muted);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--text-main);
}

.comic-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.comic-card {
  background: rgba(15, 23, 42, 0.96);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(148, 163, 184, 0.35);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.comic-card img {
  height: 170px;
  width: 100%;
  object-fit: cover;
}

.comic-card h3 {
  margin: 10px 12px 6px;
  font-size: 15px;
}

.comic-card p {
  margin: 0 12px 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.text-link {
  display: inline-block;
  margin: 0 12px 12px;
  font-size: 13px;
  color: var(--accent-strong);
}

.device-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.5fr);
  gap: 28px;
  align-items: center;
}

.device-text p {
  font-size: 14px;
  color: var(--text-muted);
}

.device-text ul {
  margin: 12px 0 10px;
  padding-left: 18px;
  font-size: 14px;
  color: var(--text-main);
}

.device-image img {
  border-radius: 22px;
  border: 1px solid rgba(148, 163, 184, 0.38);
  box-shadow: var(--shadow-soft);
  height: 240px;
  object-fit: cover;
}

/* 内页通用 */
.page-content {
  padding: 32px 0 40px;
}

.page-article {
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.98), #020617);
  border-radius: 22px;
  padding: 24px 20px 22px;
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: var(--shadow-soft);
  font-size: 14px;
  color: var(--text-muted);
}

.page-article h1 {
  font-size: 22px;
  margin-top: 0;
  margin-bottom: 14px;
  color: var(--text-main);
}

.page-article h2 {
  font-size: 18px;
  margin: 22px 0 10px;
  color: var(--text-main);
}

.page-article p {
  margin: 0 0 10px;
}

.page-article ul,
.page-article ol {
  padding-left: 18px;
  margin: 4px 0 10px;
}

.sub-section {
  margin-top: 14px;
}

.back-link {
  margin-top: 18px;
  font-size: 13px;
}

.back-link a {
  color: var(--accent-strong);
}

/* 目录页 */
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.catalog-card {
  background: rgba(15, 23, 42, 0.96);
  border-radius: var(--radius-md);
  border: 1px solid rgba(148, 163, 184, 0.35);
  padding: 12px;
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
}

.catalog-card img {
  height: 88px;
  object-fit: cover;
  border-radius: 10px;
}

.catalog-card h3 {
  margin: 0 0 4px;
  font-size: 15px;
}

.catalog-card p {
  margin: 0;
  font-size: 13px;
  color: var(--text-muted);
}

.scene-list {
  list-style: none;
  padding: 0;
}

.scene-list li + li {
  margin-top: 4px;
}

/* 下载页 */
.download-section {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.4fr);
  gap: 24px;
  align-items: center;
}

.download-image img {
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  box-shadow: var(--shadow-soft);
}

.notice {
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-muted);
}

.step-list {
  padding-left: 18px;
}

.step-list li + li {
  margin-top: 4px;
}

/* 指南页 */
.guide-image img {
  margin-top: 8px;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.3);
  height: 210px;
  object-fit: cover;
}

.faq-list dt {
  font-weight: 600;
  margin-top: 8px;
  color: var(--text-main);
}

.faq-list dd {
  margin-left: 0;
  margin-bottom: 4px;
}

/* 页脚 */
.site-footer {
  border-top: 1px solid rgba(30, 64, 175, 0.7);
  background: radial-gradient(circle at top, #020617, #020617);
  padding: 18px 0 20px;
  margin-top: 10px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 12px;
  color: var(--text-muted);
}

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

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

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

.footer-copy {
  margin: 0;
}

/* 响应式处理 */
@media (max-width: 900px) {
  .hero-inner,
  .device-grid,
  .download-section {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-image img,
  .device-image img {
    height: 220px;
  }

  .feature-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .comic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .site-header {
    position: static;
  }

  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .main-nav {
    width: 100%;
    flex-wrap: wrap;
    gap: 8px;
  }

  .hero {
    padding-top: 24px;
  }

  .page-article {
    padding: 18px 14px 18px;
    border-radius: 18px;
  }

  .catalog-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .comic-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}