/* Tangxin Vlog Official - tangxinvlog.forum */
:root {
  --bg: #0a0a0c;
  --bg-soft: #121218;
  --bg-card: #1a1a22;
  --text: #f2f2f5;
  --text-muted: #a8a8b3;
  --accent: #e11d48;
  --accent-soft: #fb7185;
  --line: rgba(255, 255, 255, 0.08);
  --max: 1120px;
  --radius: 12px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding-top: 64px;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent-soft);
  text-decoration: none;
}

a:hover {
  color: #fff;
  text-decoration: underline;
}

.container {
  width: min(100% - 32px, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 12, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.brand:hover {
  text-decoration: none;
  color: #fff;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px 20px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--text-muted);
  font-size: 0.95rem;
  text-decoration: none;
  padding: 6px 0;
}

.nav a:hover,
.nav a.active {
  color: #fff;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  color: #fff;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.25rem;
}

/* Hero */
.hero {
  position: relative;
  padding: 56px 0 40px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(225, 29, 72, 0.22), transparent),
    linear-gradient(180deg, #121218 0%, var(--bg) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 40px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--accent-soft);
  border: 1px solid rgba(251, 113, 133, 0.35);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(1.75rem, 3.5vw, 2.55rem);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero-lead {
  margin: 0 0 24px;
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 36em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: 0.2s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: #be123c;
  color: #fff;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: #fff;
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
}

.hero-visual {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 9 / 14;
  object-fit: cover;
  object-position: top;
  max-height: 520px;
}

/* Sections */
.section {
  padding: 56px 0;
}

.section-alt {
  background: var(--bg-soft);
  border-block: 1px solid var(--line);
}

.section-head {
  margin-bottom: 28px;
  max-width: 46em;
}

.section-head h2 {
  margin: 0 0 10px;
  font-size: clamp(1.4rem, 2.5vw, 1.85rem);
  line-height: 1.3;
}

.section-head p {
  margin: 0;
  color: var(--text-muted);
}

/* Feature cards / category grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.card-media {
  aspect-ratio: 9 / 16;
  max-height: 360px;
  overflow: hidden;
  background: #000;
}

.card-media.wide {
  aspect-ratio: 16 / 10;
  max-height: none;
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}

.card-body {
  padding: 16px 18px 20px;
}

.card-body h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.card-body p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* Content article blocks */
.prose {
  color: var(--text-muted);
}

.prose h2,
.prose h3 {
  color: var(--text);
  margin: 1.6em 0 0.6em;
  line-height: 1.35;
}

.prose h2 {
  font-size: 1.45rem;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.prose h3 {
  font-size: 1.15rem;
}

.prose p {
  margin: 0 0 1em;
}

.prose ul,
.prose ol {
  margin: 0 0 1.1em;
  padding-left: 1.35em;
}

.prose li {
  margin-bottom: 0.45em;
}

.prose strong {
  color: #fff;
  font-weight: 600;
}

.toc {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 0 0 32px;
}

.toc h2 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  border: none;
  padding: 0;
}

.toc ol {
  margin: 0;
  padding-left: 1.2em;
  color: var(--text-muted);
}

.toc a {
  color: var(--accent-soft);
}

.figure-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 24px 0;
}

.figure {
  margin: 0;
}

.figure img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  object-fit: cover;
  object-position: top;
  max-height: 480px;
}

.figure figcaption {
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
}

.highlight-box {
  background: linear-gradient(135deg, rgba(225, 29, 72, 0.12), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(225, 29, 72, 0.25);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin: 24px 0;
}

.highlight-box p:last-child {
  margin-bottom: 0;
}

.inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 8px;
}

.chip {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--bg-card);
  border: 1px solid var(--line);
  color: var(--text-muted);
  font-size: 0.85rem;
  text-decoration: none;
}

.chip:hover {
  color: #fff;
  border-color: rgba(251, 113, 133, 0.4);
  text-decoration: none;
}

/* Page hero for inner pages */
.page-hero {
  padding: 40px 0 24px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-soft);
}

.page-hero h1 {
  margin: 0 0 10px;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.page-hero p {
  margin: 0;
  color: var(--text-muted);
  max-width: 42em;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

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

.breadcrumb span {
  margin: 0 6px;
  opacity: 0.5;
}

/* Error pages */
.error-page {
  min-height: 70vh;
  display: flex;
  align-items: center;
  text-align: center;
  padding: 60px 0;
}

.error-page h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  margin: 0 0 8px;
  color: var(--accent);
}

.error-page h2 {
  margin: 0 0 12px;
  font-size: 1.4rem;
}

.error-page p {
  color: var(--text-muted);
  margin: 0 0 24px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: #070709;
  padding: 40px 0 28px;
  margin-top: 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 28px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  margin-bottom: 10px;
}

.footer-brand img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

.site-footer h3 {
  margin: 0 0 12px;
  font-size: 0.95rem;
  color: #fff;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer li {
  margin-bottom: 8px;
}

.site-footer a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.site-footer a:hover {
  color: #fff;
}

.footer-note {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin: 0;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Mobile */
@media (max-width: 900px) {
  .hero-grid,
  .grid-3,
  .footer-grid,
  .figure-row {
    grid-template-columns: 1fr;
  }

  .grid-2,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-visual img {
    max-height: 420px;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 64px;
    background: #111116;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 16px 18px;
    gap: 0;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 12px 8px;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 560px) {
  .grid-2,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 40px 0;
  }

  .hero {
    padding: 36px 0 28px;
  }

  .card-media {
    max-height: 420px;
  }
}