/* 糖心Vlog · txvip.pics */
:root {
  --brand: #e11d48;
  --brand-deep: #9f1239;
  --brand-soft: #fff1f2;
  --ink: #1c1917;
  --muted: #57534e;
  --line: #e7e5e4;
  --paper: #fffaf9;
  --card: #ffffff;
  --accent: #f43f5e;
  --grad: linear-gradient(135deg, #fff1f2 0%, #ffe4e6 40%, #fecdd3 100%);
  --shadow: 0 12px 40px rgba(159, 18, 57, 0.08);
  --radius: 14px;
  --max: 1120px;
  --font-display: "ZCOOL XiaoWei", "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  font-size: 16px;
  min-height: 100vh;
}

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

a {
  color: var(--brand-deep);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--brand);
}

ul {
  list-style: none;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 110;
  background: rgba(255, 250, 249, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.02em;
}

.logo img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  object-fit: cover;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.35rem 1.25rem;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav a:hover,
.nav a.active {
  color: var(--brand);
}

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

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

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

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

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

/* Hero */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--grad);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: center;
  padding: 3.5rem 0 3rem;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  line-height: 1.15;
  color: var(--brand-deep);
  margin-bottom: 0.85rem;
  animation: rise 0.8s ease both;
}

.hero h1 {
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 1rem;
  animation: rise 0.8s ease 0.08s both;
}

.hero-lead {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 36rem;
  margin-bottom: 1.5rem;
  animation: rise 0.8s ease 0.16s both;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  animation: rise 0.8s ease 0.24s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 8px 24px rgba(225, 29, 72, 0.28);
}

.btn-primary:hover {
  background: var(--brand-deep);
  color: #fff;
}

.btn-ghost {
  background: #fff;
  color: var(--brand-deep);
  border-color: #fda4af;
}

.btn-ghost:hover {
  background: var(--brand-soft);
  color: var(--brand);
}

.hero-visual {
  position: relative;
  animation: float-in 1s ease 0.2s both;
}

.hero-visual img {
  width: 100%;
  max-width: 420px;
  margin-inline: auto;
  border-radius: 22px;
  box-shadow: var(--shadow);
  border: 4px solid #fff;
}

/* Sections */
.section {
  padding: 3.5rem 0;
}

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

.section-head {
  margin-bottom: 1.75rem;
  max-width: 46rem;
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  color: var(--ink);
  margin-bottom: 0.55rem;
}

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

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

.prose p {
  margin-bottom: 1rem;
}

.prose h3 {
  font-size: 1.2rem;
  color: var(--ink);
  margin: 1.75rem 0 0.75rem;
}

.prose ul,
.prose ol {
  margin: 0.75rem 0 1.25rem 1.25rem;
}

.prose ul {
  list-style: disc;
}

.prose ol {
  list-style: decimal;
}

.prose li {
  margin-bottom: 0.4rem;
  color: var(--muted);
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.feature-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.feature-card img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
  background: var(--brand-soft);
}

.feature-card .body {
  padding: 1rem 1.1rem 1.2rem;
}

.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--muted);
}

/* Shot mosaic */
.shot-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.shot-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
}

.shot-item img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
}

.shot-item figcaption {
  padding: 0.7rem 0.85rem;
  font-size: 0.88rem;
  color: var(--muted);
}

/* Split */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

.split img {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  max-height: 640px;
  width: 100%;
  object-fit: cover;
  object-position: top;
}

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.step {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.step-num {
  display: inline-flex;
  width: 2rem;
  height: 2rem;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand-deep);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.step h3 {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}

.step p {
  font-size: 0.92rem;
  color: var(--muted);
}

/* FAQ */
.faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.15rem;
  margin-bottom: 0.75rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
}

.faq details p {
  margin-top: 0.65rem;
  color: var(--muted);
  font-size: 0.95rem;
}

/* Page hero (inner pages) */
.page-hero {
  background: var(--grad);
  border-bottom: 1px solid var(--line);
  padding: 2.5rem 0;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  color: var(--brand-deep);
  margin-bottom: 0.5rem;
}

.page-hero p {
  color: var(--muted);
  max-width: 40rem;
}

.breadcrumb {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 0.85rem;
}

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

.content-wrap {
  padding: 2.5rem 0 3.5rem;
}

.content-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow);
}

.related {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.related h2 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
}

.related ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.25rem;
}

.related a {
  font-weight: 500;
}

/* Error pages */
.error-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 3rem 1rem;
}

.error-page .code {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 7rem);
  color: var(--brand);
  line-height: 1;
  margin-bottom: 0.5rem;
}

.error-page h1 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.error-page p {
  color: var(--muted);
  margin-bottom: 1.5rem;
  max-width: 28rem;
}

/* Footer */
.site-footer {
  background: #1c1917;
  color: #d6d3d1;
  padding: 2.75rem 0 1.5rem;
  margin-top: 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.site-footer h3 {
  color: #fff;
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
}

.site-footer p,
.site-footer a {
  color: #a8a29e;
  font-size: 0.92rem;
}

.site-footer a:hover {
  color: #fda4af;
}

.site-footer ul li {
  margin-bottom: 0.45rem;
}

.footer-bottom {
  border-top: 1px solid #44403c;
  padding-top: 1.1rem;
  font-size: 0.85rem;
  color: #78716c;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
}

.age-tip {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid #fda4af;
  border-radius: 999px;
  color: #fecdd3;
  font-size: 0.8rem;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float-in {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 960px) {
  .hero-inner,
  .split {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
  }

  .hero-visual img {
    max-width: 280px;
  }

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

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

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 720px) {
  .menu-toggle {
    display: inline-flex;
  }

  .nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: #fffaf9;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    padding: 0.75rem 1rem 1rem;
    gap: 0.85rem;
  }

  .nav.open {
    display: flex;
  }

  .feature-grid,
  .shot-grid,
  .steps,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    padding: 2rem 0;
  }

  .section {
    padding: 2.5rem 0;
  }

  .content-card {
    padding: 1.25rem 1rem;
  }
}