@charset "UTF-8";
/* ============================================================
   Folia · 官方网站
   版式对标 midmgw.cn，黑白配色 + 品牌蓝紫点缀
   ============================================================ */

:root{
  --folia_nav_w: clamp(218px,16vw,274px);
  --folia_ink: #14151a;
  --folia_ink_soft: #2b2d36;
  --folia_muted: #6b6e78;
  --folia_dim: #9a9ca6;
  --folia_paper: #ffffff;
  --folia_tint: #f4f5f9;
  --folia_line: #e2e3ea;
  --folia_dark: #121318;
  --folia_blue: #7c86bb;
  --folia_accent: #5f6698;
  --folia_accent_light: #b4badf;
  color-scheme: light;
}

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

html{
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  -webkit-text-size-adjust: 100%;
}

body{
  margin: 0;
  color: var(--folia_ink);
  background: var(--folia_paper);
  font-family: "Microsoft YaHei","PingFang SC","Hiragino Sans GB",Arial,sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  overflow-x: hidden;
}

a,button,summary{
  color: inherit;
  -webkit-tap-highlight-color: transparent;
}

a{ text-decoration: none; }

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

::selection{
  color: var(--folia_paper);
  background: var(--folia_ink);
}

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

/* ---------- 顶栏（对标站结构） ---------- */

.folia_topbar{
  position: fixed;
  z-index: 30;
  top: 0;
  right: 0;
  left: 0;
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 18px;
  color: var(--folia_paper);
  background: var(--folia_dark);
  box-shadow: 0 1px 0 rgba(255,255,255,.06);
}

.folia_brand,
.folia_footer_brand{
  display: flex;
  align-items: center;
  gap: 10px;
}

.folia_brand img,
.folia_footer_brand img{
  width: 38px;
  height: 38px;
  object-fit: cover;
  border-radius: 9px;
  background: #fff;
}

.folia_brand span,
.folia_footer_brand span{
  display: grid;
  gap: 3px;
}

.folia_brand b,
.folia_footer_brand b{
  font-size: 17px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .02em;
}

.folia_brand small,
.folia_footer_brand small{
  font-size: 11px;
  line-height: 1;
  opacity: .72;
}

.folia_top_download{
  margin-left: auto;
  padding: 11px 16px;
  color: var(--folia_ink);
  font-size: 13px;
  font-weight: 900;
  background: var(--folia_paper);
  border-radius: 5px;
  transition: background .2s ease;
}

.folia_top_download:hover{
  background: #e9eaf0;
}

.folia_menu_toggle{
  display: none;
  width: 40px;
  height: 38px;
  margin-left: 10px;
  padding: 8px;
  border: 1px solid rgba(255,255,255,.7);
  border-radius: 5px;
}

.folia_menu_toggle span{
  display: block;
  height: 2px;
  margin: 3px 0;
  background: #fff;
}

/* ---------- 左侧频道导航 ---------- */

.folia_nav{
  position: fixed;
  z-index: 20;
  top: 64px;
  bottom: 0;
  left: 0;
  width: var(--folia_nav_w);
  display: flex;
  flex-direction: column;
  padding: 18px 10px 25px;
  background: #fff;
  border-right: 1px solid var(--folia_line);
  overflow-y: auto;
}

.folia_nav ul{
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.folia_nav a{
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 0 14px;
  color: var(--folia_ink);
  font-size: 16px;
  font-weight: 900;
  border: 2px solid var(--folia_ink);
  transition: color .2s ease, background .2s ease, border-color .2s ease;
}

.folia_nav a:hover,
.folia_nav a.folia_active,
body:not(:has(:target)) .folia_nav a[href="#top"],
body:has(#top:target) .folia_nav a[href="#top"],
body:has(#rhythm:target) .folia_nav a[href="#rhythm"],
body:has(#stage:target) .folia_nav a[href="#stage"],
body:has(#route:target) .folia_nav a[href="#route"],
body:has(#faq:target) .folia_nav a[href="#faq"],
body:has(#gallery:target) .folia_nav a[href="#gallery"],
body:has(#voices:target) .folia_nav a[href="#voices"]{
  color: #fff;
  background: var(--folia_ink);
  border-color: var(--folia_ink);
}

.folia_nav em{
  margin-left: auto;
  font-size: 11px;
  font-style: normal;
  opacity: .65;
}

.folia_nav > p{
  margin: auto 14px 0;
  padding-top: 28px;
  color: var(--folia_muted);
  font-size: 13px;
  font-style: italic;
  line-height: 1.8;
  border-top: 1px solid var(--folia_line);
}

.folia_scrim{
  display: none;
}

/* ---------- 首屏 ---------- */

.folia_main{
  margin-left: var(--folia_nav_w);
  padding-top: 64px;
  overflow: hidden;
}

.folia_hero{
  position: relative;
  min-height: min(760px,calc(100vh - 64px));
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 80px clamp(42px,8vw,145px);
  color: #fff;
  background: #0c0d11;
}

.folia_hero_media{
  position: absolute;
  z-index: 0;
  inset: 0;
  display: block;
}

.folia_hero_media img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 68% center;
}

.folia_hero::after{
  position: absolute;
  z-index: 1;
  inset: 0;
  content: "";
  background:
    linear-gradient(90deg,
      rgba(9,10,14,.95) 0%,
      rgba(9,10,14,.8) 42%,
      rgba(9,10,14,.34) 72%,
      rgba(9,10,14,.12) 100%);
}

.folia_hero_copy{
  position: relative;
  z-index: 2;
  width: min(640px,100%);
  padding: clamp(25px,4vw,52px);
  background: rgba(15,16,22,.68);
  border-left: 7px solid var(--folia_blue);
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
}

.folia_eyebrow,
.folia_kicker{
  margin: 0 0 12px;
  color: var(--folia_accent_light);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.folia_hero h1{
  margin: 0;
  color: #fff;
  font-size: clamp(58px,8vw,118px);
  font-weight: 900;
  line-height: .88;
  letter-spacing: -5px;
}

.folia_hero_slogan{
  display: inline-block;
  margin: 25px 0 17px;
  padding: 7px 12px 9px;
  color: var(--folia_ink);
  font-size: clamp(29px,3.6vw,52px);
  font-weight: 900;
  line-height: 1.08;
  background: #fff;
}

.folia_hero_text{
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.8;
}

.folia_hero_tags{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 19px 0;
}

.folia_hero_tags span{
  padding: 6px 10px;
  font-size: 12px;
  font-weight: 700;
  border: 1px solid rgba(255,255,255,.8);
  border-radius: 5px;
}

.folia_hero_download{
  display: inline-flex;
  gap: 18px;
  align-items: center;
  padding: 15px 20px;
  color: var(--folia_ink);
  font-weight: 900;
  background: #fff;
  border-radius: 5px;
  transition: background .2s ease;
}

.folia_hero_download:hover{
  background: #e9eaf0;
}

.folia_hero_meta{
  display: block;
  margin-top: 15px;
  color: rgba(255,255,255,.74);
  font-size: 12px;
}

.folia_hero_os{
  margin: 6px 0 0;
  color: rgba(255,255,255,.5);
  font-size: 11px;
  letter-spacing: .06em;
}

/* ---------- 通用版块 ---------- */

.folia_section{
  width: min(100%,1200px);
  margin: 0 auto;
  padding: 100px 34px;
}

.folia_section h2,
.folia_download_cta h2{
  margin: 0;
  color: var(--folia_ink);
  font-size: clamp(32px,4vw,52px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -2px;
}

.folia_heading{
  max-width: 720px;
  margin-bottom: 34px;
}

.folia_heading > p:last-child{
  margin: 10px 0 0;
  color: var(--folia_muted);
  font-size: 14px;
  line-height: 1.85;
}

/* ---------- 01 听歌节奏 ---------- */

.folia_calendar{
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  border: 2px solid var(--folia_ink);
}

.folia_calendar aside{
  display: flex;
  flex-direction: column;
  padding: 27px;
  color: #fff;
  background:
    radial-gradient(120% 90% at 0% 0%,rgba(255,255,255,.09),transparent 60%),
    var(--folia_dark);
}

.folia_calendar aside span{
  color: var(--folia_accent_light);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: .18em;
}

.folia_calendar aside b{
  display: block;
  margin-top: 55px;
  font-size: 27px;
  line-height: 1.25;
}

.folia_calendar aside p{
  margin: auto 0 0;
  padding-top: 22px;
  color: rgba(255,255,255,.7);
  font-size: 13px;
  line-height: 1.75;
}

.folia_calendar article{
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 17px;
  padding: 20px;
  border-bottom: 1px solid var(--folia_line);
}

.folia_calendar article:last-child{
  border: 0;
}

.folia_calendar time{
  color: var(--folia_accent);
  font-size: 14px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}

.folia_calendar b,
.folia_calendar span{
  display: block;
}

.folia_calendar b{
  margin-bottom: 6px;
  font-size: 16px;
}

.folia_calendar span{
  color: var(--folia_muted);
  font-size: 13px;
  line-height: 1.7;
}

.folia_cover_rail{
  display: flex;
  gap: 10px;
  margin-top: 22px;
  padding-bottom: 4px;
  overflow-x: auto;
}

.folia_cover_rail article{
  display: grid;
  grid-template-columns: 66px 1fr;
  column-gap: 8px;
  flex: 1 0 180px;
  min-height: 79px;
  padding: 6px;
  background: #fff;
  border: 1px solid var(--folia_line);
  transition: border-color .2s ease;
}

.folia_cover_rail article:hover{
  border-color: var(--folia_ink);
}

.folia_cover_rail img{
  grid-row: span 2;
  width: 66px;
  height: 66px;
  object-fit: cover;
  background: var(--folia_tint);
}

.folia_cover_rail b{
  align-self: end;
  font-size: 13px;
}

.folia_cover_rail span{
  align-self: start;
  color: var(--folia_muted);
  font-size: 11px;
  line-height: 1.45;
}

/* ---------- 02 歌词舞台 ---------- */

.folia_discover{
  display: grid;
  grid-template-columns: .7fr 1.3fr;
  gap: 68px;
  align-items: start;
  background: var(--folia_tint);
}

.folia_discover_grid{
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  grid-template-rows: repeat(3,190px);
  gap: 10px;
}

.folia_discover_grid article{
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  padding: 22px;
  background: #fff;
  border: 1px solid var(--folia_line);
}

.folia_feature picture,
.folia_gallery_grid picture{
  display: block;
  width: 100%;
  height: 100%;
}

.folia_discover_grid .folia_feature{
  position: relative;
  grid-row: span 3;
  overflow: hidden;
  padding: 0;
  color: #fff;
  background: var(--folia_dark);
}

.folia_feature img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 34%;
}

.folia_feature::after{
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 55%;
  content: "";
  background: linear-gradient(transparent,rgba(9,10,14,.9));
}

.folia_feature div{
  position: absolute;
  z-index: 1;
  right: 20px;
  bottom: 20px;
  left: 20px;
}

.folia_feature span{
  color: var(--folia_accent_light);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: .16em;
}

.folia_feature b{
  display: block;
  margin-top: 7px;
  font-size: 21px;
  line-height: 1.35;
}

.folia_discover_grid i{
  color: var(--folia_accent);
  font-size: 13px;
  font-style: normal;
  font-weight: 900;
}

.folia_discover_grid article:not(.folia_feature) b{
  display: block;
  margin-top: auto;
  font-size: 19px;
}

.folia_discover_grid p{
  margin: 8px 0 0;
  color: var(--folia_muted);
  font-size: 13px;
  line-height: 1.7;
}

.folia_discover_grid .folia_accent{
  color: #fff;
  background: var(--folia_dark);
  border-color: var(--folia_dark);
}

.folia_accent i{
  color: var(--folia_accent_light) !important;
}

.folia_accent p{
  color: rgba(255,255,255,.76) !important;
}

/* ---------- 03 使用方式 ---------- */

.folia_route{
  display: grid;
  grid-template-columns: .8fr .8fr 1.4fr;
  gap: 42px;
  align-items: start;
}

.folia_route_copy{
  color: var(--folia_muted);
  font-size: 14px;
  line-height: 1.9;
}

.folia_route_copy p{
  margin: 0;
}

.folia_route_copy a{
  display: inline-flex;
  gap: 15px;
  margin-top: 17px;
  padding-bottom: 6px;
  color: var(--folia_ink);
  font-weight: 900;
  border-bottom: 2px solid var(--folia_blue);
}

.folia_steps{
  display: grid;
  grid-template-columns: repeat(3,1fr);
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--folia_ink);
}

.folia_steps li{
  min-height: 180px;
  padding: 19px 14px;
  border-right: 1px solid var(--folia_line);
}

.folia_steps li:last-child{
  border: 0;
}

.folia_steps li span{
  color: var(--folia_accent);
  font-size: 12px;
  font-weight: 900;
}

.folia_steps li b{
  display: block;
  margin-top: 45px;
  font-size: 18px;
}

.folia_steps li p{
  margin: 7px 0 0;
  color: var(--folia_muted);
  font-size: 12px;
  line-height: 1.6;
}

/* ---------- 04 常见问题 ---------- */

.folia_faq{
  display: grid;
  grid-template-columns: .5fr 1.5fr;
  gap: 70px;
  background: var(--folia_tint);
}

.folia_faq > div > p:last-child{
  color: var(--folia_muted);
  font-size: 14px;
  line-height: 1.8;
}

.folia_faq_list{
  display: grid;
  gap: 9px;
}

.folia_faq_list details{
  background: #fff;
  border: 1px solid var(--folia_line);
  border-radius: 5px;
}

.folia_faq_list summary{
  display: flex;
  align-items: center;
  min-height: 60px;
  padding: 0 18px;
  font-size: 14px;
  font-weight: 900;
  cursor: pointer;
  list-style: none;
}

.folia_faq_list summary::-webkit-details-marker{
  display: none;
}

.folia_faq_list i{
  margin-left: auto;
  color: var(--folia_accent);
  font-size: 21px;
  font-style: normal;
}

.folia_faq_list details[open] i{
  transform: rotate(45deg);
}

.folia_faq_list p{
  margin: -2px 18px 18px;
  color: var(--folia_muted);
  font-size: 13px;
  line-height: 1.8;
}

.folia_faq_list p a{
  color: var(--folia_accent);
  font-weight: 800;
}

/* ---------- 05 画面收藏 ---------- */

.folia_gallery{
  padding-top: 25px;
}

.folia_gallery_grid{
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  grid-template-rows: 145px 145px;
  grid-template-areas: "main top" "main wide";
  gap: 10px;
}

.folia_gallery_grid figure{
  position: relative;
  min-height: 0;
  margin: 0;
  overflow: hidden;
  background: var(--folia_tint);
}

.folia_gallery_main{ grid-area: main; }
.folia_gallery_top{ grid-area: top; }
.folia_gallery_wide{ grid-area: wide; }

.folia_gallery_grid img{
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.folia_gallery_main img{ object-position: center 24%; }
.folia_gallery_top img{ object-position: center 28%; }

.folia_gallery_grid figure::after{
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 48%;
  content: "";
  background: linear-gradient(transparent,rgba(9,10,14,.8));
}

.folia_gallery_grid figcaption{
  position: absolute;
  z-index: 1;
  right: 13px;
  bottom: 12px;
  left: 13px;
  color: #fff;
  font-size: 13px;
  font-weight: 800;
}

/* ---------- 06 用户评价 ---------- */

.folia_voices_band{
  color: var(--folia_ink);
  background: var(--folia_tint);
  border-top: 1px solid var(--folia_line);
  border-bottom: 1px solid var(--folia_line);
}

.folia_voices{
  padding-top: 92px;
  padding-bottom: 92px;
}

.folia_review_grid{
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 15px;
}

.folia_review{
  position: relative;
  min-height: 275px;
  padding: 21px 21px 45px;
  background: #fff;
  border: 1px solid var(--folia_line);
  border-radius: 5px;
}

.folia_review header{
  display: flex;
  gap: 9px;
  align-items: center;
}

.folia_review header span{
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #fff;
  font-size: 13px;
  font-weight: 900;
  background: var(--folia_ink);
  border-radius: 50%;
}

.folia_review header b{
  font-size: 14px;
}

.folia_review em{
  margin-left: auto;
  color: #9aa1c4;
  font-size: 11px;
  font-style: normal;
  letter-spacing: .08em;
}

.folia_review > p{
  margin: 16px 0 0;
  color: #5d606b;
  font-size: 13px;
  line-height: 1.75;
}

.folia_review > p a{
  color: var(--folia_ink);
  font-weight: 700;
  border-bottom: 1px solid rgba(20,21,26,.3);
}

.folia_review time{
  position: absolute;
  right: 21px;
  bottom: 18px;
  color: var(--folia_dim);
  font-size: 12px;
}

/* ---------- 下载区 ---------- */

.folia_download_cta{
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 35px;
  width: min(100%,1200px);
  margin: 0 auto;
  padding: 72px 34px;
}

.folia_download_cta .folia_kicker{
  color: var(--folia_accent);
}

.folia_cta_note{
  margin: 12px 0 0;
  color: var(--folia_dim);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
}

.folia_download_cta > a{
  padding: 17px 22px;
  color: #fff;
  font-size: 14px;
  font-weight: 900;
  background: var(--folia_ink);
  border-radius: 5px;
  transition: background .2s ease;
}

.folia_download_cta > a:hover{
  background: #2a2c35;
}

/* ---------- 页脚 ---------- */

.folia_footer{
  min-height: 210px;
  display: grid;
  grid-template-columns: auto 1fr;
  padding-left: var(--folia_nav_w);
  color: #fff;
  background: var(--folia_dark);
}

.folia_footer_brand{
  justify-content: center;
  padding: 30px;
  background: #1a1b22;
}

.folia_footer_brand small{
  opacity: .6;
}

.folia_footer_center{
  display: grid;
  place-content: center;
  gap: 28px;
  padding: 32px 20px;
  text-align: center;
}

.folia_footer_center nav{
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.folia_footer_center nav a{
  padding: 0 14px;
  font-size: 13px;
  font-weight: 700;
  border-right: 1px solid rgba(255,255,255,.35);
}

.folia_footer_center nav a:last-child{
  border: 0;
}

.folia_footer_center p{
  margin: 0;
  color: rgba(255,255,255,.72);
  font-size: 12px;
}

.folia_footer_center .folia_footer_note{
  margin-top: -16px;
  color: rgba(255,255,255,.45);
  font-size: 11px;
}

/* ---------- 浮动按钮 ---------- */

.folia_back_top{
  position: fixed;
  z-index: 10;
  right: 22px;
  bottom: 22px;
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: #fff;
  font-size: 21px;
  font-weight: 900;
  background: var(--folia_ink);
  border-radius: 50%;
}

.folia_report{
  position: fixed;
  z-index: 10;
  right: 22px;
  bottom: 76px;
  display: inline-flex;
  gap: 7px;
  align-items: center;
  padding: 9px 14px 9px 12px;
  color: var(--folia_ink);
  font-size: 11.5px;
  font-weight: 600;
  background: rgba(255,255,255,.96);
  border: 1px solid var(--folia_line);
  border-radius: 5px;
  box-shadow: 0 8px 22px rgba(20,21,26,.12);
  transition: border-color .2s ease;
}

.folia_report svg{
  width: 15px;
  height: 15px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.folia_report:hover{
  border-color: var(--folia_ink);
}

/* ---------- 投诉页 ---------- */

.folia_page{
  max-width: 920px;
  margin: 0 auto;
  padding: 126px 24px 60px;
}

.folia_page h1{
  margin: 0 0 18px;
  color: var(--folia_ink);
  font-size: clamp(40px,5.6vw,62px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -2px;
}

.folia_page_lead{
  max-width: 720px;
  margin: 0;
  color: var(--folia_muted);
  font-size: 15px;
  line-height: 1.9;
}

.folia_page_card{
  margin-top: 36px;
  padding: clamp(24px,4vw,44px);
  background: #fff;
  border: 1px solid var(--folia_line);
  border-radius: 5px;
}

.folia_page_card h2{
  margin: 32px 0 10px;
  color: var(--folia_ink);
  font-size: 16px;
  font-weight: 900;
}

.folia_page_card h2:first-child{
  margin-top: 0;
}

.folia_page_card p,
.folia_page_card li{
  color: var(--folia_muted);
  font-size: 13.5px;
  line-height: 1.9;
}

.folia_page_card ul,
.folia_page_card ol{
  margin: 8px 0 0;
  padding-left: 20px;
}

.folia_page_card li{
  margin: 5px 0;
}

.folia_page_card a{
  color: var(--folia_ink);
  font-weight: 600;
  border-bottom: 1px solid rgba(20,21,26,.3);
}

.folia_page_mail{
  display: inline-flex;
  margin: 26px 0 8px;
  padding: 15px 24px;
  color: #fff !important;
  font-size: 13px;
  font-weight: 800;
  background: var(--folia_ink);
  border: 0 !important;
  border-radius: 5px;
}

.folia_page_note{
  margin-top: 18px;
  color: var(--folia_dim) !important;
  font-size: 12px !important;
}

.folia_page_back{
  display: inline-block;
  margin-top: 36px;
  padding-bottom: 5px;
  color: var(--folia_ink);
  font-size: 13px;
  font-weight: 900;
  border-bottom: 2px solid var(--folia_blue);
}

.folia_page_footer{
  margin-top: 60px;
  padding: 26px 20px 40px;
  color: var(--folia_dim);
  font-size: 11.5px;
  text-align: center;
  border-top: 1px solid var(--folia_line);
}

/* ---------- 平板 ---------- */

@media (max-width:900px){
  :root{
    --folia_nav_w: clamp(210px,25vw,240px);
  }

  .folia_section,
  .folia_download_cta{
    padding-right: 25px;
    padding-left: 25px;
  }

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

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

  .folia_steps{
    grid-column: span 2;
  }

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

/* ---------- 手机 ---------- */

@media (max-width:680px){
  :root{
    --folia_nav_w: 0px;
  }

  .folia_topbar{
    padding: 0 13px;
  }

  .folia_brand img{
    width: 35px;
    height: 35px;
  }

  .folia_brand b{
    font-size: 15px;
  }

  .folia_brand small{
    font-size: 10px;
  }

  .folia_top_download{
    padding: 10px 11px;
    font-size: 12px;
  }

  .folia_menu_toggle{
    display: block;
  }

  .folia_nav{
    z-index: 35;
    width: min(82vw,300px);
    transform: translateX(-105%);
    transition: transform .22s ease;
    box-shadow: 10px 0 28px rgba(20,21,26,.18);
  }

  .folia_nav:target{
    transform: translateX(0);
  }

  .folia_scrim{
    position: fixed;
    z-index: 33;
    inset: 64px 0 0;
    display: block;
    background: rgba(20,21,26,.32);
    opacity: 0;
    visibility: hidden;
    transition: opacity .2s ease, visibility .2s ease;
  }

  .folia_nav:target ~ .folia_scrim{
    opacity: 1;
    visibility: visible;
  }

  .folia_main{
    margin-left: 0;
  }

  .folia_hero{
    min-height: 650px;
    align-items: flex-end;
    padding: 90px 20px 54px;
  }

  .folia_hero_media img{
    object-position: 58% center;
  }

  .folia_hero::after{
    background:
      linear-gradient(180deg,rgba(9,10,14,.2) 0%,rgba(9,10,14,.72) 52%,rgba(9,10,14,.94) 82%,rgba(9,10,14,.98) 100%);
  }

  .folia_hero_copy{
    padding: 25px 18px;
    border-left-width: 5px;
  }

  .folia_hero h1{
    font-size: 63px;
    letter-spacing: -3px;
  }

  .folia_hero_slogan{
    margin-top: 19px;
    font-size: 30px;
  }

  .folia_hero_text{
    font-size: 14px;
    line-height: 1.75;
  }

  .folia_section,
  .folia_download_cta{
    padding: 68px 15px;
  }

  .folia_section h2,
  .folia_download_cta h2{
    font-size: 34px;
    letter-spacing: -1px;
  }

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

  .folia_calendar aside b{
    margin-top: 25px;
  }

  .folia_cover_rail{
    margin-right: -15px;
    padding-right: 15px;
    padding-left: 15px;
  }

  .folia_discover_grid,
  .folia_faq,
  .folia_route{
    grid-template-columns: 1fr;
    grid-template-rows: none;
    gap: 20px;
  }

  .folia_discover_grid .folia_feature{
    grid-row: auto;
    min-height: 265px;
  }

  .folia_discover_grid article:not(.folia_feature){
    min-height: 156px;
  }

  .folia_steps{
    grid-column: auto;
  }

  .folia_steps li{
    min-height: 160px;
    padding: 15px 9px;
  }

  .folia_steps li b{
    margin-top: 35px;
    font-size: 16px;
  }

  .folia_gallery_grid{
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 130px 130px 130px;
    grid-template-areas: "main main" "top top" "wide wide";
    gap: 7px;
  }

  .folia_review_grid{
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .folia_review{
    min-height: 0;
    padding: 18px 17px 44px;
  }

  .folia_review time{
    right: 17px;
    bottom: 17px;
  }

  .folia_download_cta{
    display: grid;
    gap: 28px;
    padding-top: 62px;
    padding-bottom: 62px;
  }

  .folia_download_cta > a{
    width: 220px;
    text-align: center;
  }

  .folia_footer{
    grid-template-columns: 1fr;
    min-height: 0;
    padding-left: 0;
  }

  .folia_footer_brand{
    justify-content: center;
    padding: 28px 15px 20px;
  }

  .folia_footer_center{
    gap: 20px;
    padding: 10px 15px 30px;
  }

  .folia_footer_center nav a{
    margin-bottom: 8px;
    padding: 0 9px;
  }

  .folia_footer_center .folia_footer_note{
    margin-top: 0;
  }

  .folia_back_top{
    right: 15px;
    bottom: 15px;
  }

  .folia_report{
    right: 15px;
    bottom: 68px;
  }

  .folia_page{
    padding: 100px 16px 50px;
  }
}

/* ---------- 动效偏好 ---------- */

@media (prefers-reduced-motion: reduce){
  html{
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after{
    transition-duration: .01ms !important;
  }
}


/* ---------- 顶部锚点 ---------- */

.folia_anchor{
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  overflow: hidden;
  pointer-events: none;
}
/* ---------- 404 页面 ---------- */

.folia_404{
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 64px - 96px);
  max-width: 940px;
  margin: 0 auto;
  padding: 90px 24px 60px;
  text-align: center;
}

.folia_404 .folia_kicker{
  margin-bottom: 16px;
}

.folia_404_title{
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .03em;
  margin: 0;
  color: var(--folia_ink);
  font-size: clamp(104px,17vw,220px);
  font-weight: 900;
  line-height: .86;
  letter-spacing: -.07em;
}

.folia_404_disc{
  position: relative;
  display: inline-block;
  width: .62em;
  height: .62em;
  border-radius: 50%;
  background:
    conic-gradient(from 0deg,rgba(255,255,255,.08),rgba(255,255,255,0) 28%,rgba(255,255,255,.08) 55%,rgba(255,255,255,0) 82%,rgba(255,255,255,.08)),
    repeating-radial-gradient(circle at center,#15161c 0 2px,#24262f 2px 4px);
  box-shadow: inset 0 0 0 .03em #0a0a0d;
  animation: folia_spin 26s linear infinite;
}

.folia_404_disc::before{
  position: absolute;
  inset: 33%;
  content: "";
  background: #f4f5f9;
  border: .025em solid #0a0a0d;
  border-radius: 50%;
}

.folia_404_disc::after{
  position: absolute;
  inset: 47%;
  content: "";
  background: #0a0a0d;
  border-radius: 50%;
}

@keyframes folia_spin{
  to{ transform: rotate(360deg); }
}

.folia_404_lead{
  margin: 30px 0 0;
  font-size: clamp(22px,3vw,30px);
  font-weight: 900;
  letter-spacing: -.5px;
}

.folia_404_text{
  max-width: 34em;
  margin: 14px auto 0;
  color: var(--folia_muted);
  font-size: 14px;
  line-height: 1.95;
}

.folia_404_actions{
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 34px;
}

.folia_404_primary{
  padding: 15px 26px;
  color: #fff;
  font-size: 14px;
  font-weight: 900;
  background: var(--folia_ink);
  border-radius: 5px;
  transition: background .2s ease;
}

.folia_404_primary:hover{
  background: #2a2c35;
}

.folia_404_secondary{
  padding: 15px 24px;
  font-size: 14px;
  font-weight: 700;
  border: 1px solid var(--folia_line);
  border-radius: 5px;
  transition: border-color .2s ease;
}

.folia_404_secondary:hover{
  border-color: var(--folia_ink);
}

.folia_404_links{
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0 26px;
  max-width: 640px;
  margin: 56px auto 0;
  padding-top: 22px;
  border-top: 1px solid var(--folia_line);
}

.folia_404_links a{
  padding: 6px 0;
  color: var(--folia_muted);
  font-size: 13px;
  border-bottom: 1px solid transparent;
}

.folia_404_links a:hover{
  color: var(--folia_ink);
  border-bottom-color: var(--folia_ink);
}

@media (max-width:680px){
  .folia_404{
    min-height: 0;
    padding: 92px 16px 44px;
  }

  .folia_404_title{
    font-size: clamp(92px,30vw,140px);
  }

  .folia_404_lead{
    margin-top: 24px;
  }

  .folia_404_links{
    gap: 0 18px;
    margin-top: 42px;
  }
}

@media (prefers-reduced-motion: reduce){
  .folia_404_disc{
    animation: none;
  }
}