/* ==========================================================
   acfan鼻血版 官网样式
   配色取自 App Logo：亮橙 #FF9D0B / 金黄 #FFC93C / 深棕 #3B2306
   ========================================================== */

:root {
  --orange:        #FF9D0B;   /* 主橙 */
  --orange-deep:   #F97316;   /* 深橙 */
  --orange-hot:    #FF7A00;   /* 热橙 */
  --yellow:        #FFC93C;   /* 金黄 */
  --yellow-soft:   #FFE7A3;   /* 浅金 */
  --brown:         #3B2306;   /* 深棕（标题/描边） */
  --brown-soft:    #7A5A2E;   /* 次级文字棕 */
  --red:           #E5484D;   /* 点缀红（鼻血/警示） */
  --cream:         #FFF8EC;   /* 奶油底色 */
  --white:         #FFFFFF;
  --shadow-lg:     0 24px 60px -18px rgba(122, 66, 6, .35);
  --shadow-md:     0 12px 32px -10px rgba(122, 66, 6, .25);
  --shadow-sm:     0 6px 18px -6px rgba(122, 66, 6, .2);
  --radius-lg:     26px;
  --radius-md:     18px;
  --radius-sm:     12px;
  --header-h:      72px;
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

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

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

body {
  font-family: var(--font);
  color: var(--brown);
  background: var(--cream);
  line-height: 1.7;
  overflow-x: hidden;
}

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

.container {
  width: min(1180px, 92%);
  margin-inline: auto;
}
.container-narrow { width: min(860px, 92%); }

.section { padding: 96px 0; }

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  border-radius: 999px;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
  will-change: transform;
}
.btn-lg { padding: 15px 38px; font-size: 17px; }

.btn-primary {
  background: linear-gradient(135deg, var(--yellow) 0%, var(--orange) 55%, var(--orange-hot) 100%);
  color: var(--white);
  box-shadow: 0 14px 30px -10px rgba(249, 115, 22, .55);
  text-shadow: 0 1px 2px rgba(59, 35, 6, .25);
}
.btn-primary:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 20px 40px -12px rgba(249, 115, 22, .65);
}

.btn-ghost {
  color: var(--orange-deep);
  border: 2px solid rgba(249, 115, 22, .45);
  background: rgba(255, 255, 255, .6);
}
.btn-ghost:hover {
  background: var(--white);
  border-color: var(--orange);
  transform: translateY(-3px);
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 100;
  transition: background .3s ease, box-shadow .3s ease;
}
.site-header.is-scrolled {
  background: rgba(255, 248, 236, .92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 8px 30px -12px rgba(122, 66, 6, .25);
}

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

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

.brand-logo,
.footer-logo,
.download-logo {
  /* logo 图片留空，后续填入地址即可 */
  width: 46px;
  height: 46px;
  object-fit: contain;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--yellow), var(--orange));
  box-shadow: var(--shadow-sm);
}

.brand-name {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: .5px;
  color: var(--brown);
}
.brand-name em {
  font-style: normal;
  color: var(--orange-deep);
}

.main-nav { display: flex; align-items: center; gap: 6px; }

.nav-link {
  position: relative;
  padding: 9px 16px;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--brown);
  border-radius: 999px;
  transition: color .2s, background .2s;
}
.nav-link:hover { color: var(--orange-hot); background: rgba(255, 201, 60, .25); }

.nav-link-cta {
  margin-left: 8px;
  color: var(--white);
  background: linear-gradient(135deg, var(--orange), var(--orange-hot));
  box-shadow: 0 8px 20px -8px rgba(249, 115, 22, .6);
}
.nav-link-cta:hover { color: var(--white); background: linear-gradient(135deg, var(--orange-hot), var(--red)); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
}
.nav-toggle span {
  width: 24px;
  height: 3px;
  border-radius: 2px;
  background: var(--brown);
  transition: transform .3s, opacity .3s;
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 64px) 0 130px;
  background:
    radial-gradient(900px 460px at 85% -10%, rgba(255, 201, 60, .5), transparent 65%),
    radial-gradient(700px 420px at -10% 30%, rgba(255, 157, 11, .28), transparent 60%),
    linear-gradient(180deg, #FFF3D6 0%, var(--cream) 100%);
  overflow: hidden;
}

.hero-bg .danmaku {
  position: absolute;
  top: 0;
  left: 0;
  font-size: 14px;
  font-weight: 600;
  color: rgba(122, 66, 6, .35);
  white-space: nowrap;
  animation: drift 16s linear infinite;
  pointer-events: none;
}
.danmaku.d1 { top: 16%;  font-size: 16px; animation-duration: 14s; animation-delay: 0s; }
.danmaku.d2 { top: 30%;  animation-duration: 19s; animation-delay: -6s; }
.danmaku.d3 { top: 47%;  font-size: 18px; color: rgba(229, 72, 77, .28); animation-duration: 15s; animation-delay: -3s; }
.danmaku.d4 { top: 62%;  animation-duration: 21s; animation-delay: -10s; }
.danmaku.d5 { top: 76%;  font-size: 16px; animation-duration: 17s; animation-delay: -8s; }
.danmaku.d6 { top: 88%;  animation-duration: 23s; animation-delay: -14s; }

@keyframes drift {
  from { transform: translateX(105vw); }
  to   { transform: translateX(-120%); }
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  align-items: center;
  gap: 48px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  font-size: 14px;
  font-weight: 700;
  color: var(--orange-deep);
  background: rgba(255, 255, 255, .75);
  border: 1px solid rgba(249, 115, 22, .3);
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
}
.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--red);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(229, 72, 77, .45); }
  50%      { box-shadow: 0 0 0 6px rgba(229, 72, 77, 0); }
}

.hero-title {
  margin: 22px 0 18px;
  font-size: clamp(34px, 4.6vw, 56px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: 1px;
}
.grad-text {
  background: linear-gradient(120deg, var(--orange-hot) 10%, var(--orange) 45%, #E5484D 110%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-desc {
  max-width: 560px;
  font-size: 16.5px;
  color: var(--brown-soft);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 26px 0 18px;
}
.meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 18px;
  background: var(--white);
  border: 1px solid rgba(249, 115, 22, .18);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  min-width: 118px;
}
.meta-label { font-size: 12.5px; color: var(--brown-soft); }
.meta-value {
  font-size: 16.5px;
  font-weight: 800;
  color: var(--orange-deep);
  font-variant-numeric: tabular-nums;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}
.hero-tags li {
  padding: 5px 14px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--brown);
  background: linear-gradient(135deg, rgba(255, 201, 60, .55), rgba(255, 157, 11, .3));
  border-radius: 999px;
}

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

.hero-note { margin-top: 16px; font-size: 13px; color: var(--brown-soft); }

/* ---------- 首屏截图叠放 ---------- */
.hero-shots { display: flex; flex-direction: column; align-items: center; gap: 26px; }

.screenshots {
  position: relative;
  width: min(460px, 100%);
  height: 520px;
}

.shot {
  position: absolute;
  width: 216px;
  aspect-ratio: 9 / 18.5;
  padding: 9px;
  background: #2A1B05;
  border-radius: 30px;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: transform .45s cubic-bezier(.22, 1, .36, 1),
              opacity .45s ease, filter .45s ease, z-index 0s;
  animation: floaty 5.5s ease-in-out infinite;
}

.shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 22px;
  /* 截图 img 留空时的占位底色，填入 src 后自动被图片覆盖 */
  background:
    linear-gradient(160deg, rgba(255, 201, 60, .9), rgba(255, 157, 11, .95) 55%, rgba(255, 122, 0, .95));
}

.shot figcaption {
  position: absolute;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%);
  padding: 5px 14px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--white);
  background: rgba(42, 27, 5, .78);
  border-radius: 999px;
  white-space: nowrap;
  opacity: 0;
  transition: opacity .3s ease;
}

.shot-1 { left: 2%;   top: 56px;  transform: rotate(-9deg);  z-index: 1; animation-delay: 0s; }
.shot-2 { left: 50%;  top: 8px;   transform: translateX(-50%) rotate(0deg); z-index: 3; animation-delay: .8s; }
.shot-3 { right: 2%;  top: 72px;  transform: rotate(9deg);   z-index: 2; animation-delay: 1.6s; }

/* 悬停：哪张被悬停就放大置顶完整展示 */
.screenshots:hover .shot { animation-play-state: paused; }
.screenshots:hover .shot:not(:hover) { opacity: .5; filter: saturate(.55) brightness(.96); }

.shot:hover,
.shot.is-active {
  z-index: 10;
  opacity: 1;
  filter: none;
  animation-play-state: paused;
  box-shadow: 0 34px 70px -20px rgba(59, 35, 6, .55);
}
.shot-1:hover, .shot-1.is-active { transform: rotate(-3deg) translate(-14px, -18px) scale(1.12); }
.shot-2:hover, .shot-2.is-active { transform: translateX(-50%) translateY(-22px) scale(1.12); }
.shot-3:hover, .shot-3.is-active { transform: rotate(3deg) translate(14px, -18px) scale(1.12); }

.shot:hover figcaption,
.shot.is-active figcaption { opacity: 1; }

@keyframes floaty {
  0%, 100% { margin-top: 0; }
  50%      { margin-top: -12px; }
}

.shots-tip {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--brown-soft);
  background: rgba(255, 255, 255, .7);
  padding: 7px 18px;
  border-radius: 999px;
  border: 1px dashed rgba(249, 115, 22, .4);
}

.hero-wave { position: absolute; left: 0; right: 0; bottom: -1px; line-height: 0; }
.hero-wave svg { width: 100%; height: 80px; display: block; }
.hero-wave path { fill: var(--cream); }

/* ---------- 通用 section 头部 ---------- */
.section-head { text-align: center; margin-bottom: 56px; }

.section-tag {
  display: inline-block;
  padding: 6px 18px;
  font-size: 13.5px;
  font-weight: 800;
  letter-spacing: 3px;
  color: var(--orange-hot);
  background: rgba(255, 201, 60, .28);
  border-radius: 999px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 900;
  letter-spacing: 1px;
}

.section-sub { margin-top: 12px; color: var(--brown-soft); font-size: 15.5px; }

.score-num { color: var(--orange-hot); font-size: 20px; }

/* ---------- 功能优点 ---------- */
.features {
  background:
    radial-gradient(600px 300px at 110% 10%, rgba(255, 201, 60, .25), transparent 60%),
    var(--cream);
}

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

.feature-card {
  padding: 34px 28px;
  background: var(--white);
  border: 1px solid rgba(249, 115, 22, .14);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: rgba(249, 115, 22, .45);
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 62px;
  height: 62px;
  font-size: 28px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--yellow-soft), rgba(255, 157, 11, .35));
  margin-bottom: 20px;
}

.feature-card h3 { font-size: 19px; font-weight: 800; margin-bottom: 10px; }
.feature-card p { font-size: 14.5px; color: var(--brown-soft); }

/* ---------- 用户评价 ---------- */
.reviews {
  background:
    radial-gradient(700px 340px at -10% 20%, rgba(255, 201, 60, .3), transparent 60%),
    linear-gradient(180deg, #FFF3D6, var(--cream));
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
}

.review-card {
  padding: 28px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(249, 115, 22, .14);
  box-shadow: var(--shadow-sm);
  transition: transform .3s ease, box-shadow .3s ease;
}
.review-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }

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

/* 汉字头像（不使用 img） */
.avatar {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  font-size: 19px;
  font-weight: 800;
  color: var(--white);
  flex-shrink: 0;
  text-shadow: 0 1px 2px rgba(0, 0, 0, .18);
}
.avatar-c1 { background: linear-gradient(135deg, #FFB347, #F97316); }
.avatar-c2 { background: linear-gradient(135deg, #FFC93C, #FF7A00); }
.avatar-c3 { background: linear-gradient(135deg, #FF8A65, #E5484D); }
.avatar-c4 { background: linear-gradient(135deg, #FFD166, #EF8354); }

.review-user { display: flex; flex-direction: column; gap: 2px; }
.review-user strong { font-size: 15.5px; }

.stars {
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--orange);
}

.review-text { font-size: 14.5px; color: var(--brown-soft); }

/* ---------- 常见问题 ---------- */
.faq-list { display: flex; flex-direction: column; gap: 16px; }

.faq-item {
  background: var(--white);
  border: 1px solid rgba(249, 115, 22, .16);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: border-color .3s ease;
}
.faq-item.is-open { border-color: rgba(249, 115, 22, .55); }

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 700;
  color: var(--brown);
  text-align: left;
  transition: color .2s;
}
.faq-question:hover { color: var(--orange-hot); }

.faq-arrow {
  position: relative;
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  border-radius: 50%;
  background: rgba(255, 201, 60, .4);
  transition: transform .35s ease, background .3s;
}
.faq-arrow::before,
.faq-arrow::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 2.4px;
  border-radius: 2px;
  background: var(--orange-deep);
  transform: translate(-50%, -50%);
  transition: transform .35s ease;
}
.faq-arrow::after { transform: translate(-50%, -50%) rotate(90deg); }

.faq-item.is-open .faq-arrow { transform: rotate(180deg); background: var(--orange); }
.faq-item.is-open .faq-arrow::before,
.faq-item.is-open .faq-arrow::after { background: var(--white); }
.faq-item.is-open .faq-arrow::after { transform: translate(-50%, -50%) rotate(0deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s cubic-bezier(.22, 1, .36, 1);
}
.faq-answer p {
  padding: 0 24px 22px;
  font-size: 14.5px;
  color: var(--brown-soft);
}

/* ---------- 下载区域 ---------- */
.download { padding-bottom: 110px; }

.download-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 34px;
  padding: 52px 56px;
  border-radius: 32px;
  color: var(--white);
  background:
    radial-gradient(600px 260px at 90% -20%, rgba(255, 255, 255, .22), transparent 60%),
    linear-gradient(120deg, var(--orange-hot) 0%, var(--orange) 50%, var(--yellow) 130%);
  box-shadow: 0 30px 70px -22px rgba(249, 115, 22, .6);
}

.download-logo {
  width: 92px;
  height: 92px;
  border-radius: 22px;
  background: rgba(255, 255, 255, .92);
  box-shadow: 0 10px 26px -8px rgba(59, 35, 6, .4);
}

.download-info { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }

.download-text h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 900;
  letter-spacing: 1px;
  text-shadow: 0 2px 4px rgba(59, 35, 6, .2);
}
.download-text > p { margin-top: 6px; opacity: .95; }

.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 16px;
  font-size: 13.5px;
  opacity: .96;
}
.download-meta strong { font-weight: 800; }

.download-action { text-align: center; }

/* 唯一真实下载按钮（href 留空，填入网盘/直链即可直接跳转） */
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 46px;
  font-size: 19px;
  font-weight: 900;
  letter-spacing: 1px;
  color: var(--orange-hot);
  background: var(--white);
  border-radius: 999px;
  box-shadow: 0 16px 34px -10px rgba(59, 35, 6, .45);
  transition: transform .25s ease, box-shadow .25s ease, color .25s;
  animation: breathe 2.4s ease-in-out infinite;
}
.btn-download:hover {
  transform: translateY(-4px) scale(1.04);
  color: var(--red);
  box-shadow: 0 24px 46px -12px rgba(59, 35, 6, .5);
  animation-play-state: paused;
}

@keyframes breathe {
  0%, 100% { box-shadow: 0 16px 34px -10px rgba(59, 35, 6, .45), 0 0 0 0 rgba(255, 255, 255, .5); }
  50%      { box-shadow: 0 16px 34px -10px rgba(59, 35, 6, .45), 0 0 0 14px rgba(255, 255, 255, 0); }
}

.download-tip { margin-top: 14px; font-size: 13px; opacity: .92; }

/* ---------- 页脚 ---------- */
.site-footer {
  background: #2A1B05;
  color: rgba(255, 248, 236, .85);
  padding: 44px 0 30px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 22px;
}

.footer-brand { display: flex; align-items: center; gap: 14px; }

.footer-logo {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--yellow), var(--orange));
}

.footer-name { font-size: 17px; font-weight: 800; color: var(--white); }
.footer-brand p { font-size: 12.5px; opacity: .75; }

.footer-nav { display: flex; flex-wrap: wrap; gap: 6px 22px; }
.footer-nav a {
  font-size: 13.5px;
  opacity: .85;
  transition: opacity .2s, color .2s;
}
.footer-nav a:hover { opacity: 1; color: var(--yellow); }

.footer-copy {
  width: 100%;
  text-align: center;
  font-size: 12.5px;
  opacity: .55;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 248, 236, .12);
}

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  right: 26px;
  bottom: 30px;
  z-index: 90;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: linear-gradient(135deg, var(--orange), var(--orange-hot));
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity .3s, transform .3s, visibility .3s;
}
.back-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { transform: translateY(-4px); }

/* ---------- 滚动入场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity .7s ease, transform .7s cubic-bezier(.22, 1, .36, 1);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* 尊重系统减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ==========================================================
   响应式适配
   ========================================================== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 30px; }
  .hero-text { text-align: center; }
  .hero-desc { margin-inline: auto; }
  .hero-meta, .hero-tags, .hero-actions { justify-content: center; }
  .screenshots { height: 560px; }
  .shot { width: 232px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --header-h: 64px; }
  .section { padding: 72px 0; }
  .hero { padding: calc(var(--header-h) + 44px) 0 100px; }

  /* 移动端抽屉导航 */
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px 5%;
    background: rgba(255, 248, 236, .98);
    backdrop-filter: blur(14px);
    box-shadow: 0 20px 40px -16px rgba(122, 66, 6, .3);
    transform: translateY(-130%);
    opacity: 0;
    transition: transform .35s ease, opacity .3s ease;
    pointer-events: none;
  }
  .main-nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-link { padding: 13px 18px; border-radius: var(--radius-sm); }
  .nav-link-cta { margin-left: 0; text-align: center; justify-content: center; display: flex; }

  .hero-meta { gap: 10px; }
  .meta-item { flex: 1 1 40%; min-width: 0; }

  .screenshots { height: 480px; }
  .shot { width: 200px; }
  .shot-1 { top: 44px; }
  .shot-3 { top: 58px; }

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

  .download-card { padding: 40px 28px; justify-content: center; text-align: center; }
  .download-info { justify-content: center; }
  .download-meta { justify-content: center; }
  .btn-download { width: 100%; justify-content: center; }
}

@media (max-width: 520px) {
  .hero-title { font-size: clamp(28px, 8.4vw, 36px); }
  .hero-desc { font-size: 15px; }
  .btn-lg { padding: 13px 30px; font-size: 15.5px; }

  .screenshots { height: 400px; }
  .shot { width: 168px; border-radius: 24px; padding: 7px; }
  .shot-1 { top: 28px; }
  .shot-2 { top: 4px; }
  .shot-3 { top: 40px; }
  .shot figcaption { font-size: 11px; bottom: 16px; }

  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { padding: 28px 22px; }

  .meta-item { padding: 8px 12px; }
  .meta-value { font-size: 15px; }

  .footer-inner { flex-direction: column; text-align: center; }
  .footer-brand { flex-direction: column; }
  .footer-nav { justify-content: center; }

  .back-top { right: 16px; bottom: 20px; width: 42px; height: 42px; }
}