/* ChatGal 官网 — 引擎/创作向
   纸色 + 紫罗兰；截图一律进 device-frame，避免裸图混排 */

:root {
  --ink: #2b2438;
  --ink-soft: #5c5470;
  --paper: #f4f0ea;
  --panel: #fffdf9;
  --violet: #aa96da;
  --violet-deep: #5c4b8a;
  --violet-wash: #ebe3f7;
  --rose: #d4899e;
  --mist: #8f87a4;
  --line: rgba(43, 36, 56, 0.1);
  --shadow: 0 16px 40px rgba(43, 36, 56, 0.1);
  --radius: 24px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui,
    sans-serif;
  --max: 1040px;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal,
  .device,
  .btn {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--violet-deep);
  outline-offset: 3px;
}

.container {
  width: min(100% - 2.25rem, var(--max));
  margin-inline: auto;
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(244, 240, 234, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
}

.brand img {
  width: 34px;
  height: 34px;
  border-radius: 10px;
}

.brand span {
  line-height: 1.2;
}

.brand small {
  display: block;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--mist);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.nav-links a:hover {
  color: var(--violet-deep);
}

.nav-cta {
  padding: 0.5rem 1rem;
  border-radius: 999px;
  background: var(--violet-deep);
  color: #fff !important;
  font-weight: 700;
}

/* 截图：完整显示 + 圆角，不用手机框 */
.device,
.shot {
  width: min(100%, 280px);
  margin-inline: auto;
}

.device img,
.shot img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: 0 10px 28px rgba(43, 36, 56, 0.08);
  object-fit: contain;
}

/* 宽一些的截图（创作台等） */
.device.lg,
.shot.lg {
  width: min(100%, 340px);
}

/* Hero */
.hero {
  padding: 4.5rem 0 3.5rem;
  background:
    radial-gradient(ellipse 80% 60% at 20% 0%, var(--violet-wash), transparent 55%),
    var(--paper);
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 880px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

.kicker {
  margin: 0 0 0.75rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--violet-deep);
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  line-height: 1.1;
}

.hero .sub {
  margin: 0 0 1.1rem;
  font-size: clamp(1.15rem, 2.5vw, 1.45rem);
  font-weight: 800;
  color: var(--violet-deep);
  letter-spacing: 0.04em;
}

.hero .lead {
  margin: 0 0 1.6rem;
  max-width: 32rem;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.7rem 1.35rem;
  border-radius: 999px;
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

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

.btn-primary:hover {
  background: var(--ink);
}

.btn-ghost {
  background: transparent;
  border-color: rgba(43, 36, 56, 0.22);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--violet-deep);
  color: var(--violet-deep);
}

.flow {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.5rem;
  margin-top: 1.75rem;
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.flow span {
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.flow span + span::before {
  content: "→";
  margin-right: 0.45rem;
  color: var(--violet);
}

/* Sections */
.section {
  padding: 4.25rem 0;
}

.section-alt {
  background: var(--panel);
}

.section-head {
  max-width: 36rem;
  margin-bottom: 2.25rem;
}

.section-head h2 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.55rem, 3.2vw, 2.1rem);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: 0.03em;
}

.section-head p {
  margin: 0;
  color: var(--ink-soft);
}

/* Feature grid — 无配图，避免抢戏 */
.features {
  display: grid;
  gap: 0.85rem;
}

@media (min-width: 700px) {
  .features {
    grid-template-columns: 1fr 1fr;
  }
}

.feature {
  padding: 1.25rem 1.2rem;
  border-radius: 20px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.section-alt .feature {
  background: var(--paper);
}

.feature h3 {
  margin: 0 0 0.4rem;
  font-size: 1.02rem;
  font-weight: 800;
}

.feature p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.feature .tag {
  display: inline-block;
  margin-bottom: 0.45rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--violet);
}

/* 三步创作：文字步骤 + 对应截图 */
.steps {
  display: grid;
  gap: 2rem;
}

.step {
  display: grid;
  gap: 1.5rem;
  align-items: center;
}

@media (min-width: 800px) {
  .step {
    grid-template-columns: minmax(200px, 280px) 1fr;
    gap: 2.25rem;
  }

  .step:nth-child(even) {
    grid-template-columns: 1fr minmax(200px, 280px);
  }

  .step:nth-child(even) .device {
    order: 2;
  }
}

.step-body .num {
  margin: 0 0 0.4rem;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--violet);
}

.step-body h3 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  font-weight: 900;
}

.step-body p {
  margin: 0;
  color: var(--ink-soft);
  max-width: 34rem;
}

.step-body ul {
  margin: 0.75rem 0 0;
  padding-left: 1.15rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

/* 引擎：双截图 */
.shots {
  display: grid;
  gap: 2rem;
  align-items: start;
}

@media (min-width: 780px) {
  .shots {
    grid-template-columns: 1fr 1fr 1.2fr;
  }
}

.shot-cap {
  margin: 0.75rem 0 0;
  text-align: center;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.shot-copy h3 {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
  font-weight: 900;
}

.shot-copy p {
  margin: 0 0 0.75rem;
  color: var(--ink-soft);
}

/* 示例包：只用封面，不叠截图 */
.packs {
  display: grid;
  gap: 1.1rem;
}

@media (min-width: 700px) {
  .packs {
    grid-template-columns: 1fr 1fr;
  }
}

.pack {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 0;
  overflow: hidden;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.pack img {
  width: 100%;
  height: 100%;
  min-height: 180px;
  object-fit: cover;
  object-position: top center;
  border-radius: 20px 0 0 20px;
}

.pack-body {
  padding: 1.15rem 1.15rem 1.2rem;
}

.pack-body h3 {
  margin: 0 0 0.4rem;
  font-size: 1.1rem;
  font-weight: 900;
}

.pack-body p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.55;
}

.pack-body .tag {
  display: inline-block;
  margin-bottom: 0.4rem;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  background: var(--violet-wash);
  color: var(--violet-deep);
}

/* Quote */
.band {
  padding: 3.25rem 0;
  background: var(--violet-deep);
  color: #fff;
  text-align: center;
}

.band blockquote {
  margin: 0 auto 0.5rem;
  max-width: 32rem;
  font-size: clamp(1.15rem, 2.8vw, 1.45rem);
  font-weight: 800;
  line-height: 1.55;
}

.band p {
  margin: 0;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
}

/* Download */
.dl {
  display: grid;
  gap: 1.25rem;
  padding: 1.75rem;
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

@media (min-width: 800px) {
  .dl {
    grid-template-columns: 1.35fr 1fr;
    padding: 2.1rem;
  }
}

.dl h2 {
  margin: 0 0 0.55rem;
  font-size: clamp(1.45rem, 3vw, 1.85rem);
  font-weight: 900;
}

.dl .lead {
  margin: 0 0 1.1rem;
  color: var(--ink-soft);
}

.dl-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.55rem;
}

.dl-list li {
  padding: 0.8rem 1rem;
  border-radius: 14px;
  background: var(--paper);
  border: 1px solid var(--line);
}

.dl-list a {
  font-weight: 700;
  color: var(--violet-deep);
}

.dl-list a:hover {
  text-decoration: underline;
}

.dl-list span {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.82rem;
  color: var(--mist);
}

/* Community */
.comm {
  display: grid;
  gap: 0.85rem;
}

@media (min-width: 700px) {
  .comm {
    grid-template-columns: repeat(3, 1fr);
  }
}

.comm article {
  padding: 1.2rem 1.15rem;
  border-radius: 20px;
  background: var(--paper);
  border: 1px solid var(--line);
}

.comm h3 {
  margin: 0 0 0.35rem;
  font-size: 1.02rem;
  font-weight: 800;
}

.comm p {
  margin: 0 0 0.65rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.mono {
  font-family: ui-monospace, Consolas, monospace;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.link {
  font-weight: 700;
  color: var(--violet-deep);
}

.link:hover {
  text-decoration: underline;
}

/* Footer */
.footer {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--line);
  font-size: 0.88rem;
  color: var(--mist);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
}

.footer strong {
  color: var(--ink);
}

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}