/* ==========================================================
   黄豆王子 - AI魔改短剧App 官网样式
   配色取自 App Logo：明黄 + 纯黑
   ========================================================== */

:root {
  --yellow: #ffe01a;
  --yellow-bright: #ffec4d;
  --yellow-deep: #f5c400;
  --black: #111111;
  --ink: #1c1c1c;
  --ink-soft: #2a2a2a;
  --text: #232323;
  --text-soft: #5c5c5c;
  --paper: #fffdf2;
  --white: #ffffff;
  --radius: 20px;
  --shadow: 0 12px 40px rgba(17, 17, 17, 0.12);
  --nav-h: 72px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--paper);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; }

.container {
  width: min(1160px, 92%);
  margin: 0 auto;
}
.container-narrow { width: min(860px, 92%); }

/* ============ 顶部导航 ============ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(17, 17, 17, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 224, 26, 0.14);
  transition: box-shadow 0.3s ease, background 0.3s ease;
}
.navbar.scrolled {
  background: rgba(17, 17, 17, 0.96);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
}
.nav-inner {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-img {
  width: 42px;
  height: 42px;
  object-fit: contain;
  border-radius: 12px;
  background: var(--yellow);
  border: 2px solid var(--yellow);
  display: block;
}
.brand-name {
  font-size: 20px;
  font-weight: 800;
  color: var(--yellow);
  letter-spacing: 1px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links > a {
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 999px;
  transition: color 0.25s, background 0.25s;
}
.nav-links > a:hover {
  color: var(--yellow);
  background: rgba(255, 224, 26, 0.1);
}
.nav-links .nav-download {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: 10px;
  background: var(--yellow);
  color: var(--black);
  font-weight: 700;
  padding: 9px 20px;
  border-radius: 999px;
  transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
}
.nav-links .nav-download:hover {
  background: var(--yellow-bright);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 224, 26, 0.35);
}
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 10px;
}
.menu-toggle span {
  display: block;
  height: 2.5px;
  width: 100%;
  background: var(--yellow);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ============ 首屏 Hero ============ */
.hero {
  position: relative;
  background:
    radial-gradient(ellipse 60% 50% at 78% 30%, rgba(255, 224, 26, 0.16), transparent 60%),
    radial-gradient(ellipse 40% 40% at 12% 82%, rgba(255, 224, 26, 0.08), transparent 60%),
    var(--black);
  color: var(--white);
  padding: calc(var(--nav-h) + 72px) 0 96px;
  overflow: hidden;
}
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
}
.hero-glow-1 {
  width: 480px; height: 480px;
  right: -120px; top: -120px;
  background: rgba(255, 224, 26, 0.16);
  animation: glowFloat 9s ease-in-out infinite alternate;
}
.hero-glow-2 {
  width: 380px; height: 380px;
  left: -140px; bottom: -160px;
  background: rgba(255, 224, 26, 0.09);
  animation: glowFloat 11s ease-in-out infinite alternate-reverse;
}
@keyframes glowFloat {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(30px, 24px) scale(1.12); }
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 48px;
}
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}
.badge {
  font-size: 13px;
  font-weight: 600;
  color: var(--yellow);
  border: 1px solid rgba(255, 224, 26, 0.45);
  padding: 5px 14px;
  border-radius: 999px;
  letter-spacing: 1px;
}
.badge-solid {
  background: var(--yellow);
  color: var(--black);
  border-color: var(--yellow);
  font-weight: 800;
}
.hero-title {
  font-size: clamp(34px, 4.6vw, 56px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: 1px;
  margin-bottom: 10px;
}
.hero-title-sub {
  font-size: clamp(18px, 2.2vw, 26px);
  font-weight: 700;
  color: var(--yellow);
  background: linear-gradient(90deg, var(--yellow), var(--yellow-bright));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-desc {
  max-width: 560px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 15.5px;
  margin: 14px 0 26px;
}
.hero-desc strong { color: var(--yellow); font-weight: 700; }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
}
.meta-item {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  padding: 10px 18px;
  min-width: 108px;
}
.meta-label {
  display: block;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 1px;
}
.meta-value {
  font-size: 17px;
  font-weight: 800;
  color: var(--white);
}
.meta-version { color: var(--yellow); }

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.btn-hero {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--yellow) 0%, var(--yellow-deep) 100%);
  color: var(--black);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 1px;
  padding: 15px 34px;
  border-radius: 999px;
  box-shadow: 0 10px 30px rgba(255, 224, 26, 0.32);
  transition: transform 0.25s, box-shadow 0.25s;
}
.btn-hero:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 16px 40px rgba(255, 224, 26, 0.45);
}
.hero-tip {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ---- 叠加截图 ---- */
.hero-shots {
  position: relative;
  height: 580px;
  perspective: 1200px;
}
.shot {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 252px;
  height: 546px;
  border-radius: 30px;
  overflow: hidden;
  border: 5px solid var(--ink);
  background: var(--ink);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 224, 26, 0.25);
  cursor: pointer;
  transition: transform 0.5s cubic-bezier(0.22, 0.68, 0.32, 1.12), box-shadow 0.5s, filter 0.5s;
  will-change: transform;
}
.shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  /* 空src时的占位底色，填入真实截图后自动被覆盖 */
  background:
    linear-gradient(160deg, rgba(255,224,26,0.9) 0%, rgba(245,196,0,0.9) 42%, rgba(17,17,17,0.95) 130%);
}
.shot-1 { transform: translate(-74%, -48%) rotate(-11deg); z-index: 1; filter: brightness(0.72); }
.shot-2 { transform: translate(-50%, -52%) rotate(0deg);  z-index: 3; }
.shot-3 { transform: translate(-26%, -48%) rotate(10deg); z-index: 2; filter: brightness(0.72); }

.shot:hover,
.shot.active {
  transform: translate(-50%, -52%) rotate(0deg) scale(1.07);
  z-index: 10;
  filter: brightness(1);
  box-shadow: 0 34px 80px rgba(0, 0, 0, 0.65), 0 0 0 2px var(--yellow);
}
.shot-1:hover, .shot-1.active { animation: none; }
.shot::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 62%, rgba(0,0,0,0.35));
  pointer-events: none;
}

/* ============ 通用 Section ============ */
.section { padding: 96px 0; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 4px;
  color: var(--yellow-deep);
  background: rgba(245, 196, 0, 0.12);
  border: 1px solid rgba(245, 196, 0, 0.35);
  padding: 4px 16px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 900;
  color: var(--black);
  letter-spacing: 2px;
}
.section-title::after {
  content: "";
  display: block;
  width: 56px;
  height: 5px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--yellow), var(--yellow-deep));
  margin: 14px auto 0;
}
.section-sub {
  margin-top: 14px;
  color: var(--text-soft);
  font-size: 15.5px;
}

/* ============ 功能亮点 ============ */
.features { background: var(--paper); }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--white);
  border: 1px solid rgba(17, 17, 17, 0.07);
  border-radius: var(--radius);
  padding: 34px 28px;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s, box-shadow 0.35s, border-color 0.35s;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--yellow), var(--yellow-deep));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow);
  border-color: rgba(245, 196, 0, 0.5);
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
  width: 54px; height: 54px;
  display: grid;
  place-items: center;
  background: var(--black);
  color: var(--yellow);
  font-weight: 900;
  font-size: 18px;
  border-radius: 16px;
  margin-bottom: 20px;
  box-shadow: 6px 6px 0 rgba(255, 224, 26, 0.9);
}
.feature-card h3 {
  font-size: 19px;
  font-weight: 800;
  color: var(--black);
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 14.5px;
  color: var(--text-soft);
}

/* ============ 用户评价 ============ */
.reviews {
  background:
    radial-gradient(ellipse 50% 40% at 50% 0%, rgba(255, 224, 26, 0.1), transparent 65%),
    #faf6e6;
}
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 26px;
  border: 1px solid rgba(17, 17, 17, 0.06);
  box-shadow: 0 6px 24px rgba(17, 17, 17, 0.05);
  transition: transform 0.35s, box-shadow 0.35s;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.review-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.review-stars {
  color: var(--yellow-deep);
  font-size: 17px;
  letter-spacing: 3px;
}
.review-text {
  font-size: 14.5px;
  color: var(--text);
  flex: 1;
}
.review-user {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-soft);
}
.review-avatar {
  width: 36px; height: 36px;
  display: grid;
  place-items: center;
  background: var(--yellow);
  color: var(--black);
  font-weight: 800;
  border-radius: 50%;
  border: 2px solid var(--black);
}

/* ============ 常见问题 ============ */
.faq { background: var(--paper); }
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: var(--white);
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.faq-item.open {
  border-color: rgba(245, 196, 0, 0.6);
  box-shadow: 0 8px 28px rgba(245, 196, 0, 0.14);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 700;
  color: var(--black);
}
.faq-arrow {
  position: relative;
  width: 14px; height: 14px;
  flex-shrink: 0;
}
.faq-arrow::before,
.faq-arrow::after {
  content: "";
  position: absolute;
  background: var(--yellow-deep);
  border-radius: 2px;
  transition: transform 0.35s ease;
}
.faq-arrow::before {
  width: 14px; height: 3px;
  top: 5.5px; left: 0;
}
.faq-arrow::after {
  width: 3px; height: 14px;
  top: 0; left: 5.5px;
}
.faq-item.open .faq-arrow::after {
  transform: scaleY(0);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-answer p {
  padding: 0 24px 22px;
  font-size: 14.5px;
  color: var(--text-soft);
}

/* ============ 下载区域 ============ */
.download {
  position: relative;
  background:
    radial-gradient(ellipse 55% 60% at 50% 110%, rgba(255, 224, 26, 0.2), transparent 65%),
    var(--black);
  color: var(--white);
  padding: 110px 0;
  overflow: hidden;
  text-align: center;
}
.download-glow {
  position: absolute;
  width: 640px; height: 640px;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(255, 224, 26, 0.14), transparent 60%);
  filter: blur(30px);
  pointer-events: none;
  animation: glowFloat 10s ease-in-out infinite alternate;
}
.download-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.download-logo {
  width: 96px; height: 96px;
  object-fit: contain;
  border-radius: 26px;
  background: var(--yellow);
  border: 3px solid var(--yellow);
  box-shadow: 0 0 0 4px rgba(255, 224, 26, 0.2), 0 18px 50px rgba(255, 224, 26, 0.25);
  margin-bottom: 6px;
}
.download-title {
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 900;
  letter-spacing: 2px;
}
.download-sub {
  color: rgba(255, 255, 255, 0.65);
  font-size: 15.5px;
}
.download-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin: 18px 0 30px;
}
.download-chip {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 224, 26, 0.3);
  border-radius: 14px;
  padding: 10px 22px;
  min-width: 128px;
}
.chip-label {
  display: block;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 1px;
}
.chip-value {
  font-size: 18px;
  font-weight: 800;
  color: var(--yellow);
}
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: linear-gradient(135deg, var(--yellow-bright) 0%, var(--yellow) 45%, var(--yellow-deep) 100%);
  color: var(--black);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 2px;
  padding: 19px 60px;
  border-radius: 999px;
  box-shadow:
    0 14px 44px rgba(255, 224, 26, 0.4),
    inset 0 -3px 0 rgba(0, 0, 0, 0.14);
  transition: transform 0.25s, box-shadow 0.25s;
  animation: btnPulse 2.4s ease-in-out infinite;
}
.btn-download:hover {
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 20px 60px rgba(255, 224, 26, 0.55);
  animation: none;
}
@keyframes btnPulse {
  0%, 100% { box-shadow: 0 14px 44px rgba(255, 224, 26, 0.4), inset 0 -3px 0 rgba(0,0,0,0.14); }
  50%      { box-shadow: 0 14px 60px rgba(255, 224, 26, 0.6), inset 0 -3px 0 rgba(0,0,0,0.14); }
}
.download-note {
  margin-top: 18px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

/* ============ 页脚 ============ */
.footer {
  background: #0a0a0a;
  color: rgba(255, 255, 255, 0.6);
  padding: 52px 0 40px;
  text-align: center;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.footer-logo {
  width: 56px; height: 56px;
  object-fit: contain;
  border-radius: 16px;
  background: var(--yellow);
  border: 2px solid var(--yellow);
  margin-bottom: 6px;
}
.footer-name {
  font-size: 17px;
  font-weight: 800;
  color: var(--yellow);
  letter-spacing: 1px;
}
.footer-desc { font-size: 13.5px; }
.footer-copy {
  margin-top: 14px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.35);
}

/* ============ 滚动进入动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .hero-inner { gap: 32px; }
  .hero-shots { height: 520px; }
  .shot { width: 224px; height: 486px; }
  .feature-grid, .review-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .hero { padding: calc(var(--nav-h) + 48px) 0 72px; }
  .hero-inner { grid-template-columns: 1fr; }
  .hero-shots {
    height: 460px;
    margin-top: 8px;
    order: 2;
  }
  .shot { width: 200px; height: 434px; }
  .shot-1 { transform: translate(-78%, -46%) rotate(-10deg); }
  .shot-3 { transform: translate(-22%, -46%) rotate(9deg); }
  .shot:hover, .shot.active { transform: translate(-50%, -46%) rotate(0deg) scale(1.05); }
  .section { padding: 72px 0; }
}

@media (max-width: 640px) {
  .menu-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: rgba(17, 17, 17, 0.97);
    backdrop-filter: blur(14px);
    padding: 14px 6% 22px;
    border-bottom: 1px solid rgba(255, 224, 26, 0.2);
    transform: translateY(-130%);
    transition: transform 0.35s ease;
    z-index: 99;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links > a { padding: 13px 16px; font-size: 16px; }
  .nav-links .nav-download { margin-left: 0; justify-content: center; margin-top: 8px; }

  .hero-badges { gap: 8px; }
  .hero-title { letter-spacing: 0; }
  .hero-meta { gap: 10px; }
  .meta-item { flex: 1 1 40%; min-width: 0; padding: 9px 14px; }
  .meta-value { font-size: 15.5px; }
  .btn-hero { width: 100%; justify-content: center; padding: 15px 20px; }
  .hero-tip { width: 100%; text-align: center; }

  .hero-shots { height: 400px; }
  .shot { width: 172px; height: 374px; border-radius: 24px; border-width: 4px; }

  .feature-grid, .review-grid { grid-template-columns: 1fr; gap: 16px; }
  .feature-card { padding: 26px 22px; }

  .faq-question { padding: 16px 18px; font-size: 15px; }
  .faq-answer p { padding: 0 18px 18px; }

  .download { padding: 84px 0; }
  .btn-download { width: 100%; justify-content: center; padding: 17px 24px; font-size: 18px; }
  .download-chip { flex: 1 1 40%; min-width: 0; padding: 9px 14px; }
  .chip-value { font-size: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}