/* 糖心Vlog官网 - txvlogapp.baby */
:root {
  --bg: #0d0d12;
  --bg-soft: #16161f;
  --bg-card: #1c1c28;
  --text: #f2f2f7;
  --text-muted: #a0a0b2;
  --brand-a: #ff8a00;
  --brand-b: #e91e8c;
  --accent: #ff4d6a;
  --line: rgba(255, 255, 255, 0.08);
  --radius: 14px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --max: 1180px;
  --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;
  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: #ffb4d0;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #fff;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(13, 13, 18, 0.88);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.brand span {
  background: linear-gradient(120deg, var(--brand-a), var(--brand-b));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

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

.nav a {
  color: var(--text-muted);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.92rem;
}

.nav a:hover,
.nav a.active {
  color: #fff;
  background: rgba(233, 30, 140, 0.18);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: #fff;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 56px;
  background:
    radial-gradient(ellipse 80% 60% at 20% 20%, rgba(255, 138, 0, 0.22), transparent 55%),
    radial-gradient(ellipse 70% 50% at 85% 10%, rgba(233, 30, 140, 0.28), transparent 50%),
    linear-gradient(180deg, #14121c 0%, var(--bg) 100%);
}

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

.hero-kicker {
  display: inline-block;
  margin-bottom: 14px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  color: #ffd0e2;
  font-size: 0.85rem;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--brand-a), var(--brand-b));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  margin: 0 0 28px;
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 36em;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(120deg, var(--brand-a), var(--brand-b));
  box-shadow: 0 8px 24px rgba(233, 30, 140, 0.35);
}

.btn-primary:hover {
  color: #fff;
  filter: brightness(1.06);
}

.btn-ghost {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--line);
}

.hero-visual {
  position: relative;
}

.hero-visual img {
  width: 100%;
  border-radius: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}

.hero-badge {
  position: absolute;
  left: 16px;
  bottom: 16px;
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(13, 13, 18, 0.78);
  border: 1px solid var(--line);
  font-size: 0.85rem;
}

/* Sections */
.section {
  padding: 64px 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent);
}

.section-head {
  margin-bottom: 28px;
}

.section-head h2 {
  margin: 0 0 10px;
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
}

.section-head p {
  margin: 0;
  color: var(--text-muted);
  max-width: 52em;
}

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

.prose h2,
.prose h3 {
  color: #fff;
  margin-top: 1.6em;
}

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

.prose ul,
.prose ol {
  padding-left: 1.2em;
}

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

/* Cards / grids */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

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

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

.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(233, 30, 140, 0.35);
}

.card img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  background: #111;
}

.card.landscape img {
  aspect-ratio: 16 / 10;
}

.card-body {
  padding: 14px 16px 18px;
}

.card-body h3 {
  margin: 0 0 8px;
  font-size: 1.02rem;
}

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

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
}

.tag {
  display: inline-block;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(255, 138, 0, 0.12);
  border: 1px solid rgba(255, 138, 0, 0.25);
  color: #ffd8a8;
  font-size: 0.88rem;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.feature-item {
  padding: 20px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.feature-item h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.feature-item p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.94rem;
}

.shot-pair {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 22px;
  align-items: start;
}

.shot-pair img {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.faq details {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 10px;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: #fff;
}

.faq details p {
  margin: 10px 0 0;
  color: var(--text-muted);
}

.breadcrumb {
  padding: 18px 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.page-hero {
  padding: 36px 0 10px;
}

.page-hero h1 {
  margin: 0 0 10px;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

.page-hero p {
  margin: 0;
  color: var(--text-muted);
  max-width: 46em;
}

.legal {
  padding-bottom: 72px;
}

.legal .prose {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px 26px;
}

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

.error-page h1 {
  margin: 0 0 12px;
  font-size: clamp(2.4rem, 8vw, 4.5rem);
  background: linear-gradient(120deg, var(--brand-a), var(--brand-b));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

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

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: #0a0a0f;
  padding: 42px 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;
  gap: 12px;
  align-items: flex-start;
}

.footer-brand img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
}

.footer-brand h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.footer-brand p,
.footer-col p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.92rem;
}

.footer-col h4 {
  margin: 0 0 12px;
  font-size: 0.95rem;
}

.footer-col a {
  display: block;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-size: 0.92rem;
}

.footer-bottom {
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: #6f6f82;
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.toc {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
  margin: 18px 0 28px;
}

.toc strong {
  display: block;
  margin-bottom: 8px;
}

.toc a {
  display: inline-block;
  margin: 4px 10px 4px 0;
  color: #ffc1d8;
}

.internal-box {
  margin-top: 28px;
  padding: 18px;
  border-radius: 14px;
  border: 1px dashed rgba(233, 30, 140, 0.4);
  background: rgba(233, 30, 140, 0.08);
}

.internal-box p {
  margin: 0;
  color: var(--text-muted);
}

/* Mobile */
@media (max-width: 960px) {
  .hero-grid,
  .shot-pair,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .menu-toggle {
    display: inline-flex;
  }

  .nav {
    display: none;
  }

  .nav.open {
    display: flex;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    left: auto;
    width: min(220px, calc(100vw - 32px));
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 10px;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: rgba(22, 22, 31, 0.98);
    box-shadow: var(--shadow);
    z-index: 120;
  }

  .nav.open a {
    padding: 10px 12px;
  }

  .header-inner {
    flex-wrap: nowrap;
  }
}

@media (max-width: 640px) {
  .card-grid,
  .card-grid-4,
  .card-grid-2,
  .feature-list {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 48px 0 36px;
  }

  .section {
    padding: 44px 0;
  }

  .card img {
    aspect-ratio: 3 / 4;
  }
}