/* ==========================================================================
   橘子影视 · 产品介绍页样式
   主色取自 App Logo：品牌红 + 橘橙渐变
   ========================================================================== */

:root {
  /* 主题色（如需更换整体配色，修改这里即可全站联动） */
  --brand-red:        #f5101a;
  --brand-red-deep:   #c40a13;
  --brand-red-dark:   #8f060d;
  --brand-orange:     #ff7a1a;
  --brand-amber:      #ffb347;

  --grad-brand: linear-gradient(135deg, #ff7a1a 0%, #f5101a 60%, #d60a20 100%);
  --grad-brand-soft: linear-gradient(135deg, #fff0e8 0%, #ffe4e1 100%);

  /* 中性色 */
  --ink:        #241215;
  --ink-soft:   #4a373b;
  --muted:      #8a747a;
  --line:       #f3e0dd;
  --bg:         #fffaf9;
  --bg-warm:    #fff4f0;
  --white:      #ffffff;

  /* 尺寸与阴影 */
  --radius-sm: 10px;
  --radius:    16px;
  --radius-lg: 24px;
  --shadow-card: 0 14px 40px -18px rgba(150, 20, 24, .22);
  --shadow-red:  0 16px 38px -12px rgba(245, 16, 26, .45);

  --nav-h: 72px;
}

/* ------------------------------ 基础重置 -------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol, dl { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container {
  width: min(1200px, 92%);
  margin-inline: auto;
}

.section { padding: 104px 0; }

/* ------------------------------ 通用按钮 -------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: 999px;
  white-space: nowrap;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease, color .25s ease;
}

.btn-lg { padding: 15px 34px; font-size: 17px; }

.btn-primary {
  color: #fff;
  background: var(--grad-brand);
  background-size: 160% 160%;
  box-shadow: var(--shadow-red);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 22px 46px -12px rgba(245, 16, 26, .6); background-position: 100% 0; }

.btn-glass {
  color: #fff;
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .35);
  backdrop-filter: blur(6px);
}
.btn-glass:hover { background: rgba(255, 255, 255, .2); transform: translateY(-3px); }

/* ============================== 顶部导航 =============================== */
.navbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  --nav-fg: #fff;
  background: transparent;
  transition: background .3s ease, box-shadow .3s ease;
}
.navbar.scrolled {
  --nav-fg: var(--ink);
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 30px -18px rgba(120, 10, 14, .35);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { display: inline-flex; align-items: center; gap: 12px; }

.logo-nav { width: 42px; height: 42px; border-radius: 12px; box-shadow: 0 6px 16px -6px rgba(245, 16, 26, .6); }

.brand-name {
  font-size: 21px;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--nav-fg);
  transition: color .3s ease;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}
.nav-links > a {
  font-size: 15.5px;
  font-weight: 500;
  color: var(--nav-fg);
  opacity: .88;
  position: relative;
  transition: opacity .2s ease, color .2s ease;
}
.nav-links > a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}
.nav-links > a:not(.btn):hover { opacity: 1; }
.nav-links > a:not(.btn):hover::after { transform: scaleX(1); }

.btn-nav {
  color: #fff;
  font-size: 14.5px;
  font-weight: 600;
  padding: 9px 22px;
  background: var(--grad-brand);
  box-shadow: 0 10px 24px -10px rgba(245, 16, 26, .7);
}
.btn-nav:hover { transform: translateY(-2px); box-shadow: 0 14px 28px -10px rgba(245, 16, 26, .8); }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
}
.nav-toggle span {
  display: block;
  height: 2.5px;
  border-radius: 3px;
  background: var(--nav-fg);
  transition: transform .3s ease, opacity .3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ================================ 首屏 ================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 56px) 0 84px;
  color: #fff;
  overflow: hidden;
  background:
    radial-gradient(1100px 560px at 88% -8%, rgba(255, 122, 26, .38), transparent 62%),
    radial-gradient(820px 520px at -8% 108%, rgba(245, 16, 26, .5), transparent 60%),
    linear-gradient(158deg, #430a10 0%, #22060a 48%, #150406 100%);
}
.hero-grid-mask {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 80% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 50% 30%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: .55;
  pointer-events: none;
}
.hero-glow-1 { width: 420px; height: 420px; right: -120px; top: 8%; background: rgba(255, 122, 26, .45); animation: floatGlow 9s ease-in-out infinite; }
.hero-glow-2 { width: 360px; height: 360px; left: -140px; bottom: -60px; background: rgba(245, 16, 26, .55); animation: floatGlow 11s ease-in-out infinite reverse; }

@keyframes floatGlow {
  0%, 100% { transform: translate(0, 0); }
  50%      { transform: translate(-24px, 26px); }
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 500;
  color: #ffd9cb;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 140, 90, .35);
  margin-bottom: 24px;
}
.hero-badge .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--brand-orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 26, .25);
  animation: pulseDot 1.8s ease-in-out infinite;
}
@keyframes pulseDot {
  0%, 100% { box-shadow: 0 0 0 3px rgba(255, 122, 26, .28); }
  50%      { box-shadow: 0 0 0 7px rgba(255, 122, 26, .06); }
}

.hero-title {
  font-size: clamp(38px, 5.2vw, 60px);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: 2px;
}
.hero-title span {
  display: block;
  margin-top: 10px;
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 700;
  letter-spacing: 4px;
  background: linear-gradient(90deg, #ffd0a8, #ff8f86 55%, #ff5f6d);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-desc {
  margin-top: 22px;
  max-width: 560px;
  font-size: 16.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .78);
}

/* 版本信息 */
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}
.hero-meta li {
  min-width: 132px;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .12);
  display: flex;
  flex-direction: column;
  gap: 2px;
  backdrop-filter: blur(6px);
}
.meta-label { font-size: 12.5px; color: rgba(255, 255, 255, .55); }
.meta-value {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  font-variant-numeric: tabular-nums;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
}

/* 首屏数据 */
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 38px;
  margin-top: 42px;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, .12);
}
.hero-stats div { min-width: 80px; }
.hero-stats dt {
  font-size: 26px;
  font-weight: 800;
  color: #fff;
  font-variant-numeric: tabular-nums;
}
.stat-suffix {
  font-size: 17px;
  font-weight: 700;
  background: linear-gradient(90deg, #ffb347, #ff6a5e);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-stats dd { font-size: 13px; color: rgba(255, 255, 255, .55); margin-top: 2px; }

/* ------------------------- 截图叠放动态效果 ----------------------------- */
.hero-shots {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.shots-stack {
  position: relative;
  width: 100%;
  max-width: 480px;
  height: 520px;
  perspective: 1400px;
}

.shot {
  position: absolute;
  top: 30px;
  width: 232px;
  height: 460px;
  margin: 0;
  border-radius: 26px;
  overflow: hidden;
  background: linear-gradient(165deg, #3c0b11 0%, #1b0508 100%);
  border: 1px solid rgba(255, 255, 255, .14);
  box-shadow: 0 36px 70px -24px rgba(0, 0, 0, .75),
              inset 0 1px 0 rgba(255, 255, 255, .12);
  transition: transform .5s cubic-bezier(.22, .8, .24, 1),
              box-shadow .5s ease, filter .5s ease;
  cursor: pointer;
  will-change: transform;
}
.shot-1 { left: 6px;   transform: rotate(-9deg) translateY(14px); }
.shot-2 { left: 50%;  margin-left: -116px; transform: rotate(0deg) translateY(-6px); z-index: 2; }
.shot-3 { right: 6px;  transform: rotate(9deg) translateY(14px); }

.shots-stack .shot:not(:hover):not(.active) { filter: brightness(.82) saturate(.9); }

.shot-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 2;
  opacity: 1;
  transition: opacity .35s ease;
}
.shot-img.is-empty { opacity: 0; }

/* 截图空状态占位（模拟手机界面骨架） */
.shot-ph {
  position: absolute;
  inset: 0;
  z-index: 1;
  padding: 22px 18px 18px;
  display: flex;
  flex-direction: column;
}
.ph-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.ph-top i { display: block; height: 8px; border-radius: 4px; background: rgba(255, 255, 255, .28); }
.ph-top i:first-child { width: 56px; }
.ph-top i:last-child  { width: 22px; height: 22px; border-radius: 50%;
  background: var(--grad-brand); }

.ph-posters {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 18px;
}
.ph-posters i {
  aspect-ratio: 3 / 4.2;
  border-radius: 10px;
  background: linear-gradient(160deg, rgba(255, 122, 26, .85), rgba(245, 16, 26, .9));
  box-shadow: 0 10px 22px -12px rgba(245, 16, 26, .8);
}
.ph-posters i:nth-child(2) { background: linear-gradient(160deg, rgba(255, 179, 71, .9), rgba(245, 60, 30, .85)); }
.ph-posters i:nth-child(3) { background: linear-gradient(160deg, rgba(255, 95, 109, .85), rgba(196, 10, 19, .95)); }

.ph-lines { display: flex; flex-direction: column; gap: 10px; }
.ph-lines i { height: 9px; border-radius: 5px; background: rgba(255, 255, 255, .14); }
.ph-lines i:nth-child(1) { width: 86%; }
.ph-lines i:nth-child(2) { width: 64%; }
.ph-lines i:nth-child(3) { width: 42%; }

.ph-txt {
  margin-top: auto;
  padding-top: 16px;
  font-size: 12.5px;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, .6);
  text-align: center;
}

/* 悬停哪张，哪张放大居中突出 */
@media (hover: hover) and (min-width: 901px) {
  .shot-1:hover, .shot-2:hover, .shot-3:hover,
  .shot-1.active, .shot-2.active, .shot-3.active {
    transform: translateY(-30px) scale(1.08) rotate(0deg);
    z-index: 6;
    filter: brightness(1) saturate(1);
    box-shadow: 0 50px 90px -26px rgba(0, 0, 0, .85),
                0 0 0 6px rgba(255, 122, 26, .22),
                inset 0 1px 0 rgba(255, 255, 255, .16);
  }
}
.shot.active {
  transform: translateY(-24px) scale(1.06) rotate(0deg);
  z-index: 6;
  filter: brightness(1) saturate(1);
  box-shadow: 0 50px 90px -26px rgba(0, 0, 0, .85),
              0 0 0 6px rgba(255, 122, 26, .22);
}

.shots-tip {
  margin-top: 26px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, .5);
  letter-spacing: 1px;
}

/* ============================ 通用区块标题 ============================== */
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 60px;
}
.section-tag {
  display: inline-block;
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--brand-red);
  background: #ffe9e4;
  border: 1px solid #ffd2c8;
  margin-bottom: 18px;
}
.section-title {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--ink);
  line-height: 1.3;
}
.section-sub {
  margin-top: 14px;
  font-size: 16px;
  color: var(--muted);
}

/* ============================== 功能优点 =============================== */
.section-features { background: var(--bg); }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.feature-card {
  position: relative;
  padding: 34px 30px 32px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 4px;
  background: var(--grad-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}
.feature-card:hover {
  transform: translateY(-8px);
  border-color: #ffc9bd;
  box-shadow: 0 26px 54px -22px rgba(190, 20, 24, .35);
}
.feature-card:hover::before { transform: scaleX(1); }

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  color: var(--brand-red);
  background: var(--grad-brand-soft);
  margin-bottom: 22px;
  transition: transform .3s ease, color .3s ease, background .3s ease;
}
.feature-icon svg { width: 27px; height: 27px; }
.feature-card:hover .feature-icon {
  color: #fff;
  background: var(--grad-brand);
  transform: rotate(-6deg) scale(1.06);
}

.feature-card h3 {
  font-size: 19.5px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--ink);
}
.feature-card p { font-size: 15px; color: var(--muted); line-height: 1.85; }

/* 附加亮点标签 */
.bonus-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 46px;
}
.bonus-chip {
  padding: 9px 22px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-soft);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 6px 18px -12px rgba(150, 20, 24, .25);
  transition: all .25s ease;
}
.bonus-chip:hover {
  color: var(--brand-red);
  border-color: #ffc9bd;
  transform: translateY(-2px);
}

/* ============================== 用户评价 =============================== */
.section-reviews {
  background:
    radial-gradient(700px 360px at 50% -10%, rgba(255, 122, 26, .1), transparent 60%),
    var(--bg-warm);
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.review-card {
  position: relative;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 30px 30px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  transition: transform .3s ease, box-shadow .3s ease;
}
.review-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 28px 56px -24px rgba(190, 20, 24, .32);
}
.review-card::after {
  content: "”";
  position: absolute;
  top: 8px;
  right: 22px;
  font-size: 84px;
  line-height: 1;
  font-family: Georgia, serif;
  color: #ffd9d2;
  pointer-events: none;
}

.review-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

/* 汉字头像（不使用 img） */
.avatar {
  flex: none;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 21px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0;
  box-shadow: 0 8px 18px -8px rgba(245, 16, 26, .5);
}
.avatar-li   { background: linear-gradient(135deg, #ff8a3d, #f5101a); }
.avatar-chen { background: linear-gradient(135deg, #ffb347, #ff5f6d); }
.avatar-wang { background: linear-gradient(135deg, #ff6a5e, #c40a2b); }

.review-user { display: flex; flex-direction: column; line-height: 1.4; }
.review-user strong { font-size: 16.5px; color: var(--ink); }
.review-device { font-size: 12.5px; color: var(--muted); }

.stars {
  margin-left: auto;
  font-size: 16px;
  letter-spacing: 2px;
  color: #ffb020;
}

.review-card > p {
  position: relative;
  font-size: 15px;
  line-height: 1.95;
  color: var(--ink-soft);
}

/* ============================== 常见问题 =============================== */
.faq-wrap { max-width: 860px; }

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  border-radius: var(--radius);
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 10px 30px -22px rgba(150, 20, 24, .25);
  overflow: hidden;
  transition: border-color .3s ease, box-shadow .3s ease;
}
.faq-item.open {
  border-color: #ffc2b5;
  box-shadow: 0 18px 40px -22px rgba(190, 20, 24, .35);
}

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  text-align: left;
  padding: 22px 26px;
  font-size: 16.5px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.6;
}
.faq-icon {
  position: relative;
  flex: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #ffe9e4;
  transition: background .3s ease, transform .3s ease;
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 11px;
  height: 2px;
  border-radius: 2px;
  background: var(--brand-red);
  transform: translate(-50%, -50%);
  transition: transform .3s ease;
}
.faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); }
.faq-item.open .faq-icon { background: var(--grad-brand); transform: rotate(180deg); }
.faq-item.open .faq-icon::before,
.faq-item.open .faq-icon::after { background: #fff; }
.faq-item.open .faq-icon::after { transform: translate(-50%, -50%) rotate(0deg); }

.faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .38s cubic-bezier(.22, .8, .24, 1);
}
.faq-item.open .faq-a { grid-template-rows: 1fr; }
.faq-a-inner { overflow: hidden; }
.faq-a-inner p {
  padding: 0 26px 24px;
  font-size: 15px;
  line-height: 1.95;
  color: var(--muted);
}

/* ============================== 下载区域 =============================== */
.section-download {
  padding: 110px 0;
  background:
    radial-gradient(900px 420px at 50% 0%, rgba(255, 122, 26, .14), transparent 65%),
    var(--bg-warm);
}

.download-card {
  position: relative;
  text-align: center;
  padding: 72px 40px 64px;
  border-radius: 32px;
  color: #fff;
  overflow: hidden;
  background:
    radial-gradient(600px 300px at 85% 0%, rgba(255, 179, 71, .45), transparent 60%),
    radial-gradient(560px 320px at 8% 100%, rgba(143, 6, 13, .65), transparent 60%),
    linear-gradient(135deg, #f5101a 0%, #d60a20 55%, #a3071a 100%);
  box-shadow: 0 40px 90px -40px rgba(196, 10, 19, .75);
}

.download-deco {
  position: absolute;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, .18);
  pointer-events: none;
}
.download-deco-1 { width: 300px; height: 300px; left: -110px; top: -90px; }
.download-deco-2 { width: 220px; height: 220px; right: -70px; bottom: -80px; border-color: rgba(255, 255, 255, .14); }

.logo-download {
  position: relative;
  width: 88px;
  height: 88px;
  margin: 0 auto 24px;
  border-radius: 22px;
  box-shadow: 0 18px 40px -12px rgba(0, 0, 0, .45), inset 0 1px 0 rgba(255, 255, 255, .35);
}

.download-title {
  position: relative;
  font-size: clamp(28px, 3.6vw, 40px);
  font-weight: 900;
  letter-spacing: 2px;
}
.download-desc {
  position: relative;
  margin: 18px auto 0;
  max-width: 560px;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .85);
}
.download-desc strong { color: #ffd9a8; font-size: 17px; }

.download-action {
  position: relative;
  margin-top: 40px;
  display: flex;
  justify-content: center;
}

/* 突出的真实下载按钮（href 填入地址后点击直接跳转） */
.btn-download {
  position: relative;
  padding: 20px 64px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--brand-red-deep);
  background: linear-gradient(180deg, #fff 0%, #fff3ee 100%);
  border-radius: 999px;
  box-shadow: 0 18px 44px -10px rgba(0, 0, 0, .35), inset 0 -3px 0 rgba(245, 16, 26, .12);
  animation: downloadPulse 2.2s ease-out infinite;
}
.btn-download:hover {
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 26px 56px -10px rgba(0, 0, 0, .4);
  animation-play-state: paused;
}
.btn-download:active { transform: translateY(-1px) scale(1); }

@keyframes downloadPulse {
  0%   { box-shadow: 0 18px 44px -10px rgba(0, 0, 0, .35), 0 0 0 0 rgba(255, 255, 255, .55); }
  70%  { box-shadow: 0 18px 44px -10px rgba(0, 0, 0, .35), 0 0 0 22px rgba(255, 255, 255, 0); }
  100% { box-shadow: 0 18px 44px -10px rgba(0, 0, 0, .35), 0 0 0 0 rgba(255, 255, 255, 0); }
}

.download-note {
  position: relative;
  margin-top: 26px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, .7);
  letter-spacing: 1px;
}

/* ================================ 页脚 ================================= */
.footer {
  background: #160406;
  color: rgba(255, 255, 255, .7);
  padding: 56px 0 40px;
}
.footer-inner { text-align: center; }

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  text-align: left;
}
.logo-footer { width: 50px; height: 50px; border-radius: 14px; }
.footer-brand strong { display: block; font-size: 19px; color: #fff; letter-spacing: 1px; }
.footer-brand span { font-size: 13px; color: rgba(255, 255, 255, .5); }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 28px;
  margin: 28px 0 22px;
}
.footer-links a {
  font-size: 14.5px;
  color: rgba(255, 255, 255, .65);
  transition: color .2s ease;
}
.footer-links a:hover { color: #ff8f86; }

.footer-disclaimer {
  max-width: 760px;
  margin: 0 auto;
  font-size: 12.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .4);
}
.footer-copy {
  margin-top: 18px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, .32);
}

/* =========================== 滚动进入动画 ============================== */
.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity .7s ease, transform .7s cubic-bezier(.22, .8, .24, 1);
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ============================== 自适应 ================================= */
@media (max-width: 1080px) {
  .feature-grid { gap: 20px; }
  .shots-stack { height: 480px; }
  .shot { width: 210px; height: 420px; }
  .shot-2 { margin-left: -105px; }
}

@media (max-width: 980px) {
  .section { padding: 84px 0; }

  /* 移动端导航抽屉 */
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 18px 6%;
    background: rgba(255, 255, 255, .98);
    backdrop-filter: blur(14px);
    box-shadow: 0 24px 40px -24px rgba(120, 10, 14, .4);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: transform .3s ease, opacity .3s ease, visibility .3s;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-links > a {
    --nav-fg: var(--ink);
    color: var(--ink);
    padding: 13px 10px;
    font-size: 16px;
    border-radius: 10px;
  }
  .nav-links > a:active { background: var(--bg-warm); }
  .nav-links > a:not(.btn)::after { display: none; }
  .btn-nav { text-align: center; margin-top: 8px; padding: 13px; }

  /* 首屏改为上下布局 */
  .hero { min-height: auto; padding-bottom: 72px; }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 60px;
    text-align: center;
  }
  .hero-copy { display: flex; flex-direction: column; align-items: center; }
  .hero-desc { margin-inline: auto; }
  .hero-meta { justify-content: center; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; gap: 28px; }

  .feature-grid,
  .review-grid { grid-template-columns: 1fr 1fr; }
  .review-grid article:last-child { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  .hero-title { letter-spacing: 1px; }
  .hero-title span { letter-spacing: 2px; }

  .shots-stack {
    height: auto;
    max-width: 420px;
    display: flex;
    justify-content: center;
    gap: 12px;
  }
  .shot {
    position: relative;
    top: auto;
    left: auto;
    right: auto;
    width: 31%;
    max-width: 168px;
    height: auto;
    aspect-ratio: 9 / 18;
    margin: 0;
    transform: none;
    border-radius: 18px;
  }
  .shot-1, .shot-2, .shot-3 { transform: none; }
  .shots-stack .shot:not(:hover):not(.active) { filter: none; }
  .shot-ph { padding: 12px 10px; }
  .ph-top { margin-bottom: 12px; }
  .ph-posters { gap: 6px; margin-bottom: 12px; }
  .ph-lines { gap: 6px; }
  .ph-txt { font-size: 10.5px; padding-top: 8px; line-height: 1.4; }

  .feature-grid,
  .review-grid { grid-template-columns: 1fr; }
  .review-grid article:last-child { grid-column: auto; }

  .download-card { padding: 56px 22px 52px; }
  .btn-download { padding: 17px 44px; font-size: 18px; width: 100%; max-width: 320px; }

  .hero-stats { gap: 22px 30px; }
}

@media (max-width: 400px) {
  .container { width: 90%; }
  .hero-meta li { flex: 1; min-width: 96px; padding: 10px 14px; }
  .meta-value { font-size: 15px; }
  .btn-lg { padding: 13px 26px; font-size: 15.5px; }
  .faq-q { padding: 18px 20px; font-size: 15px; }
  .faq-a-inner p { padding: 0 20px 20px; }
}

/* 用户偏好减少动效时尊重系统设置 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}