/* =========================================================
   51黑料app · 黑料网 — 设计系统
   分区：1 变量 2 重置 3 布局 4 文字 5 按钮 6 导航 7 卡片
        8 Hero 9 跑马灯 10 视频卡 11 榜单 12 话题/文章
        13 数据/特性 14 评价 15 CTA/下载 16 FAQ 17 提示/弹层
        18 页脚 19 内页页头 20 分页 21 动效 22 响应式 23 附加
   ========================================================= */

/* ---------- 1 设计变量 ---------- */
:root{
  --primary:#5B4BF7;
  --primary-deep:#3D2ED9;
  --pink:#FF6A9C;
  --mint:#14C9A5;
  --amber:#FFB43A;
  --sky:#3FB9F5;

  --ink:#14142B;
  --white:#FFFFFF;
  --bg:#F7F7FD;
  --surface:#FFFFFF;
  --line:#E8E8F4;
  --muted:#66668A;
  --soft:#9B9BBB;
  --ink-2:#3A3A5C;

  --grad-brand:linear-gradient(135deg,#5B4BF7 0%,#9B5CF6 100%);
  --grad-warm:linear-gradient(135deg,#FF6A9C 0%,#FFB43A 100%);
  --grad-mint:linear-gradient(135deg,#14C9A5 0%,#3FB9F5 100%);
  --grad-ink:linear-gradient(160deg,#1A1840 0%,#2B2160 60%,#3D2ED9 130%);

  --r-xs:8px;
  --r-sm:12px;
  --r-md:18px;
  --r-lg:26px;
  --r-xl:34px;
  --r-full:999px;

  --sh-1:0 2px 8px rgba(48,42,120,.06);
  --sh-2:0 6px 20px rgba(48,42,120,.09);
  --sh-3:0 14px 40px rgba(48,42,120,.13);
  --sh-4:0 24px 64px rgba(48,42,120,.18);
  --sh-glow:0 12px 36px rgba(91,75,247,.35);

  --fs-hero:clamp(2.1rem,1.4rem + 3.4vw,3.6rem);
  --fs-h1:clamp(1.9rem,1.3rem + 2.4vw,3rem);
  --fs-h2:clamp(1.5rem,1.2rem + 1.5vw,2.2rem);
  --fs-h3:clamp(1.15rem,1.05rem + .5vw,1.4rem);
  --fs-lead:clamp(1rem,.95rem + .4vw,1.18rem);
  --fs-body:1rem;
  --fs-small:.9rem;
  --fs-tiny:.8rem;

  --container:1180px;
  --gutter:22px;
  --ease:cubic-bezier(.22,.8,.28,1);
}

/* ---------- 2 基础重置 ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"Outfit","Noto Sans SC",-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.7;font-size:16px;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea,select{font:inherit;color:inherit}
ul,ol{list-style:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:3px solid rgba(91,75,247,.45);outline-offset:2px;border-radius:6px}
::selection{background:rgba(91,75,247,.18)}

h1,h2,h3,h4,h5{color:var(--ink);line-height:1.3;font-weight:800;letter-spacing:.01em}
h1,h2{text-wrap:balance}
h1{font-size:var(--fs-h1)}
h2{font-size:var(--fs-h2)}
h3{font-size:var(--fs-h3)}
p{color:var(--ink-2)}

/* ---------- 3 布局工具 ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.section{padding:clamp(56px,5vw + 24px,96px) 0}
.section-tight{padding:clamp(40px,3vw + 16px,64px) 0}
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-side{display:grid;grid-template-columns:1.7fr .9fr;gap:28px;align-items:start}
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(32px,4vw,64px);align-items:center}
.center{text-align:center}
.narrow{max-width:760px;margin-left:auto;margin-right:auto}

/* ---------- 4 文字/标题组件 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.82rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--primary);background:rgba(91,75,247,.09);
  padding:7px 16px;border-radius:var(--r-full);margin-bottom:16px;
}
.eyebrow::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--grad-brand)}
.sec-head{max-width:720px;margin:0 auto clamp(30px,3vw,48px)}
.sec-head.left{margin-left:0}
.sec-head.center{text-align:center}
.sec-head h2{margin-bottom:12px}
.sec-head p{color:var(--muted);font-size:var(--fs-lead)}
.grad-text{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.muted{color:var(--muted)}
.small{font-size:var(--fs-small)}
.tiny{font-size:var(--fs-tiny)}
.prose{max-width:780px}
.prose p{margin-bottom:1.1em;color:var(--ink-2)}
.prose h3{margin:1.6em 0 .7em}
.prose ul,.prose ol{margin:0 0 1.2em 1.2em;list-style:disc;color:var(--ink-2)}
.prose ol{list-style:decimal}
.prose li{margin-bottom:.45em}
.prose strong{color:var(--ink)}

/* ---------- 5 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 26px;border-radius:var(--r-full);
  font-weight:700;font-size:.98rem;line-height:1.2;white-space:nowrap;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s,color .25s;
  border:2px solid transparent;
}
.btn svg{width:18px;height:18px;flex:none}
.btn-primary{background:var(--grad-brand);color:#fff;box-shadow:var(--sh-glow)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 18px 44px rgba(91,75,247,.42)}
.btn-ghost{background:rgba(91,75,247,.08);color:var(--primary)}
.btn-ghost:hover{background:rgba(91,75,247,.16);transform:translateY(-3px)}
.btn-outline{border-color:var(--line);background:var(--surface);color:var(--ink)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-3px)}
.btn-warm{background:var(--grad-warm);color:#fff;box-shadow:0 12px 32px rgba(255,106,156,.35)}
.btn-warm:hover{transform:translateY(-3px)}
.btn-lg{padding:16px 34px;font-size:1.05rem}
.btn-sm{padding:9px 18px;font-size:.88rem}
.btn-block{width:100%}
.btn-group{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.btn-group.center{justify-content:center}

/* ---------- 6 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.92);
  border-bottom:1px solid transparent;
  transition:box-shadow .3s,border-color .3s;
}
.site-header.is-stuck{box-shadow:var(--sh-2);border-color:var(--line)}
.nav-bar{display:flex;align-items:center;gap:28px;height:72px}
.logo{display:flex;align-items:center;gap:11px;font-weight:800;font-size:1.18rem;flex:none}
.logo-mark{width:42px;height:42px;border-radius:14px;background:var(--grad-brand);display:grid;place-items:center;color:#fff;box-shadow:var(--sh-glow);flex:none}
.logo-mark svg{width:26px;height:26px}
.logo b{background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.logo .logo-sub{display:block;font-size:.66rem;font-weight:600;color:var(--soft);letter-spacing:.2em;line-height:1.1}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-links a{
  padding:9px 16px;border-radius:var(--r-full);font-weight:600;font-size:.95rem;color:var(--ink-2);
  transition:background .2s,color .2s;
}
.nav-links a:hover{background:rgba(91,75,247,.08);color:var(--primary)}
.nav-links a.is-active{background:rgba(91,75,247,.1);color:var(--primary)}
.nav-links > .btn{display:none}
.nav-toggle{display:none;width:44px;height:44px;border-radius:var(--r-sm);background:rgba(91,75,247,.08);color:var(--primary);margin-left:auto}
.nav-toggle svg{width:22px;height:22px;margin:auto}
.nav-close{display:none}
.nav-scrim{
  position:fixed;inset:0;background:rgba(20,20,43,.45);z-index:98;opacity:0;pointer-events:none;transition:opacity .3s;
}
.nav-scrim.is-open{opacity:1;pointer-events:auto}

/* ---------- 7 卡片 ---------- */
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px;box-shadow:var(--sh-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.card:hover{transform:translateY(-5px);box-shadow:var(--sh-3)}
.card h3{margin-bottom:8px}
.card p{color:var(--muted);font-size:var(--fs-small)}
.card-icon{
  width:52px;height:52px;border-radius:16px;display:grid;place-items:center;margin-bottom:16px;color:#fff;
}
.card-icon svg{width:26px;height:26px}
.icon-brand{background:var(--grad-brand)}
.icon-pink{background:var(--grad-warm)}
.icon-mint{background:var(--grad-mint)}
.icon-amber{background:linear-gradient(135deg,#FFB43A,#FF8A5C)}
.card-tag{
  display:inline-block;font-size:.74rem;font-weight:700;letter-spacing:.08em;
  padding:4px 12px;border-radius:var(--r-full);background:rgba(91,75,247,.09);color:var(--primary);
  margin-bottom:12px;
}
.card-tag.t-pink{background:rgba(255,106,156,.12);color:#E4477B}
.card-tag.t-mint{background:rgba(20,201,165,.13);color:#0D9E82}
.card-tag.t-amber{background:rgba(255,180,58,.16);color:#C97F0B}

/* ---------- 8 Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--bg);padding:clamp(48px,6vw,90px) 0 clamp(56px,6vw,96px)}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(560px 420px at 88% 12%,rgba(91,75,247,.13),transparent 65%),
    radial-gradient(480px 380px at 6% 88%,rgba(255,106,156,.11),transparent 65%);
}
.hero .container{position:relative;z-index:1}
.hero-kicker{display:inline-flex;align-items:center;gap:10px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-full);padding:7px 8px 7px 14px;font-size:.85rem;font-weight:600;color:var(--ink-2);box-shadow:var(--sh-1);margin-bottom:22px}
.hero-kicker b{background:var(--grad-brand);color:#fff;border-radius:var(--r-full);padding:3px 12px;font-size:.78rem}
.hero h1{font-size:var(--fs-hero);margin-bottom:18px}
.hero-lead{font-size:var(--fs-lead);color:var(--muted);max-width:560px}
.hero-stats{display:flex;flex-wrap:wrap;gap:34px;margin-top:34px}
.hero-stat b{display:block;font-size:1.6rem;font-weight:800;background:var(--grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stat span{font-size:.82rem;color:var(--soft);font-weight:600}

.hero-visual{position:relative;min-height:480px}
.hero-phone{
  position:relative;width:min(300px,78%);margin:0 auto;
  border-radius:42px;background:#191932;padding:12px;
  box-shadow:var(--sh-4);
}
.hero-screen{border-radius:32px;overflow:hidden;background:linear-gradient(180deg,#221F52,#171536);padding:16px 14px 20px;color:#fff}
.hero-screen .hs-top{display:flex;justify-content:space-between;align-items:center;font-size:.7rem;color:#B9B4EE;padding:2px 6px 12px}
.hs-search{background:rgba(255,255,255,.09);border-radius:var(--r-full);padding:8px 12px;font-size:.7rem;color:#8F8AC9;display:flex;gap:6px;align-items:center;margin-bottom:12px}
.hs-banner{border-radius:18px;background:var(--grad-brand);padding:14px;margin-bottom:12px}
.hs-banner b{font-size:.86rem;display:block}
.hs-banner span{font-size:.66rem;color:#DCD8FF}
.hs-chips{display:flex;gap:6px;margin-bottom:12px;flex-wrap:wrap}
.hs-chips i{font-style:normal;font-size:.62rem;padding:4px 10px;border-radius:var(--r-full);background:rgba(255,255,255,.1);color:#CFC9F5}
.hs-chips i.on{background:var(--grad-warm);color:#fff}
.hs-vids{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.hs-vid{border-radius:12px;overflow:hidden;background:rgba(255,255,255,.08)}
.hs-vid img{width:100%;height:64px;object-fit:cover}
.hs-vid p{font-size:.6rem;color:#B9B4EE;padding:5px 7px 8px;margin:0;line-height:1.4}
.hs-play{width:22px;height:22px;border-radius:50%;background:rgba(255,255,255,.2);display:grid;place-items:center;margin:6px}
.hs-play svg{width:10px;height:10px}

.float-chip{
  position:absolute;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);padding:12px 16px;box-shadow:var(--sh-3);
  display:flex;align-items:center;gap:10px;font-size:.82rem;font-weight:700;
  animation:floaty 5.5s ease-in-out infinite;
}
.float-chip .fc-dot{width:34px;height:34px;border-radius:11px;display:grid;place-items:center;color:#fff;flex:none}
.float-chip .fc-dot svg{width:18px;height:18px}
.float-chip small{display:block;font-weight:600;color:var(--soft);font-size:.7rem}
.chip-a{top:6%;left:0}
.chip-b{bottom:12%;left:-2%;animation-delay:-2.2s}
.chip-c{top:24%;right:-2%;animation-delay:-3.6s}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}

.blob{position:absolute;border-radius:50%;filter:blur(0);pointer-events:none}
.blob-b1{width:200px;height:200px;background:rgba(155,92,246,.16);top:-30px;right:8%;z-index:0}
.blob-b2{width:150px;height:150px;background:rgba(255,106,156,.14);bottom:4%;left:6%;z-index:0}

/* 吉祥物：小料（戴放大镜的猫头鹰） */
.mascot{position:absolute;bottom:-8px;right:6%;width:88px;z-index:3;animation:floaty 6s ease-in-out infinite}

/* ---------- 9 跑马灯 ---------- */
.ticker{background:var(--grad-ink);overflow:hidden;padding:15px 0;position:relative}
.ticker-track{display:flex;gap:44px;width:max-content;animation:ticker-run 32s linear infinite}
.ticker:hover .ticker-track{animation-play-state:paused}
.ticker-track span{color:#CFC9F5;font-size:.88rem;font-weight:600;display:inline-flex;align-items:center;gap:10px;white-space:nowrap}
.ticker-track span::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--pink)}
.ticker-track span b{color:#fff;font-weight:800}
@keyframes ticker-run{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- 10 视频卡 ---------- */
.vid-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.vid-grid-2{grid-template-columns:repeat(2,1fr)}
.video-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);cursor:pointer;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--sh-3)}
.thumb{position:relative;overflow:hidden;display:block}
.thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s var(--ease)}
.video-card:hover .thumb img{transform:scale(1.06)}
.thumb::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(18,16,50,.55))}
.thumb-badge{position:absolute;top:12px;left:12px;z-index:2;background:rgba(255,255,255,.94);color:var(--primary);font-size:.72rem;font-weight:800;padding:4px 11px;border-radius:var(--r-full)}
.thumb-dur{position:absolute;bottom:10px;right:12px;z-index:2;background:rgba(18,16,50,.8);color:#fff;font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:8px}
.thumb-play{
  position:absolute;inset:0;margin:auto;width:52px;height:52px;border-radius:50%;z-index:2;
  background:rgba(255,255,255,.92);color:var(--primary);display:grid;place-items:center;
  opacity:0;transform:scale(.7);transition:opacity .3s,transform .3s var(--ease);
}
.thumb-play svg{width:20px;height:20px;margin-left:2px}
.video-card:hover .thumb-play{opacity:1;transform:scale(1)}
.vbody{padding:16px 18px 18px}
.vbody h3{font-size:1rem;margin-bottom:8px;line-height:1.45}
.vmeta{display:flex;align-items:center;gap:12px;font-size:.78rem;color:var(--soft);font-weight:600}
.vmeta .dot{width:4px;height:4px;border-radius:50%;background:var(--soft);flex:none}

/* ---------- 11 榜单 ---------- */
.rank-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px;box-shadow:var(--sh-1)}
.rank-card h3{font-size:1.05rem;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.rank-card h3 svg{width:20px;height:20px;color:var(--amber)}
.rank-item{
  display:grid;grid-template-columns:30px 84px minmax(0,1fr);gap:12px;align-items:center;
  padding:11px 0;border-top:1px dashed var(--line);
}
.rank-item:first-of-type{border-top:none}
.rank-num{font-weight:800;font-size:1.05rem;color:var(--soft);text-align:center}
.rank-item:nth-child(2) .rank-num{color:#FF5A5A}
.rank-item:nth-child(3) .rank-num{color:#FF8A3C}
.rank-item:nth-child(4) .rank-num{color:var(--amber)}
.rank-item img{width:84px;height:52px;object-fit:cover;border-radius:10px}
.rank-info{min-width:0}
.rank-info b{display:block;font-size:.88rem;line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.rank-end{grid-column:2/-1;display:flex;gap:10px;font-size:.72rem;color:var(--soft);font-weight:600;margin-top:2px}
.rank-end .hot{color:#FF5A5A}

/* ---------- 12 话题/文章列表 + 筛选 ---------- */
.filter-pills{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:28px}
.filter-pills button{
  padding:9px 20px;border-radius:var(--r-full);font-weight:700;font-size:.88rem;
  background:var(--surface);border:1px solid var(--line);color:var(--ink-2);
  transition:all .22s;
}
.filter-pills button:hover{border-color:var(--primary);color:var(--primary)}
.filter-pills button.is-on{background:var(--grad-brand);color:#fff;border-color:transparent;box-shadow:var(--sh-glow)}
[data-filterable] .hide-item{display:none}

.topic-row{
  display:grid;grid-template-columns:180px minmax(0,1fr) auto;gap:20px;align-items:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:16px;box-shadow:var(--sh-1);transition:transform .25s var(--ease),box-shadow .25s var(--ease);
}
.topic-row:hover{transform:translateY(-3px);box-shadow:var(--sh-3)}
.topic-row img{width:180px;height:104px;object-fit:cover;border-radius:var(--r-sm)}
.topic-row h3{font-size:1.02rem;margin-bottom:6px}
.topic-row p{font-size:.86rem;color:var(--muted)}
.topic-side{display:flex;flex-direction:column;align-items:flex-end;gap:8px}
.heat{font-size:.8rem;font-weight:800;color:#FF5A5A;white-space:nowrap}
.topic-list{display:grid;gap:16px}

/* ---------- 13 数据/特性 ---------- */
.stat-band{background:var(--grad-ink);border-radius:var(--r-xl);padding:clamp(30px,4vw,52px);color:#fff;position:relative;overflow:hidden}
.stat-band::before{content:"";position:absolute;width:280px;height:280px;border-radius:50%;background:rgba(155,92,246,.25);filter:blur(60px);top:-80px;right:-60px}
.stat-band h2,.stat-band h3{color:#fff}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;position:relative}
.stat-grid b{display:block;font-size:clamp(1.7rem,1.2rem + 1.8vw,2.6rem);font-weight:800;color:#fff}
.stat-grid span{font-size:.85rem;color:#B9B4EE;font-weight:600}
.feature-num{font-size:.8rem;font-weight:800;color:var(--primary);letter-spacing:.12em;margin-bottom:10px;display:block}

/* ---------- 14 评价 ---------- */
.quote{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;box-shadow:var(--sh-1)}
.quote-stars{color:var(--amber);font-size:.9rem;letter-spacing:2px;margin-bottom:12px}
.quote p{color:var(--ink-2);font-size:.95rem;margin-bottom:18px}
.quote-who{display:flex;align-items:center;gap:12px}
.avatar{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:800;font-size:.95rem;flex:none}
.quote-who b{display:block;font-size:.92rem}
.quote-who span{font-size:.76rem;color:var(--soft)}

/* ---------- 15 CTA/下载 ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-xl);
  background:var(--grad-ink);color:#fff;padding:clamp(38px,5vw,68px);
  box-shadow:var(--sh-4);
}
.cta-band::before{content:"";position:absolute;width:340px;height:340px;border-radius:50%;background:rgba(255,106,156,.22);filter:blur(70px);bottom:-140px;left:-90px}
.cta-band h2,.cta-band h3{color:#fff}
.cta-band p{color:#C7C2F0}
.cta-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.2fr .8fr;gap:36px;align-items:center}
.store-btn{
  display:flex;align-items:center;gap:14px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);
  border-radius:var(--r-md);padding:14px 20px;color:#fff;transition:background .25s,transform .25s var(--ease);
  width:100%;text-align:left;
}
.store-btn:hover{background:rgba(255,255,255,.18);transform:translateY(-3px)}
.store-btn svg{width:30px;height:30px;flex:none}
.store-btn b{display:block;font-size:1rem}
.store-btn span{font-size:.76rem;color:#B9B4EE}
.store-list{display:grid;gap:12px}
.download-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.dl-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;text-align:center;box-shadow:var(--sh-1);transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.dl-card:hover{transform:translateY(-5px);box-shadow:var(--sh-3)}
.dl-card h3{margin:14px 0 6px}
.dl-ver{font-size:.78rem;color:var(--soft);font-weight:600}
.dl-note{font-size:.82rem;color:var(--muted);margin:10px 0 18px}
.qr-box{width:132px;height:132px;margin:0 auto 6px;border-radius:var(--r-sm);background:#fff;border:1px solid var(--line);padding:8px}
.qr-box svg{width:100%;height:100%}

/* ---------- 16 FAQ ---------- */
.faq{max-width:800px;margin:0 auto;display:grid;gap:14px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;transition:box-shadow .25s}
.faq-item.is-open{box-shadow:var(--sh-2)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;font-weight:700;font-size:1rem;text-align:left}
.faq-q .fi{width:30px;height:30px;border-radius:50%;background:rgba(91,75,247,.1);color:var(--primary);display:grid;place-items:center;flex:none;transition:transform .3s var(--ease)}
.faq-q .fi svg{width:14px;height:14px}
.faq-item.is-open .fi{transform:rotate(45deg);background:var(--grad-brand);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s var(--ease)}
.faq-a-in{padding:0 22px 20px;color:var(--muted);font-size:.94rem}

/* ---------- 17 提示条/弹层 ---------- */
.notice{
  display:flex;gap:12px;align-items:flex-start;background:rgba(255,180,58,.12);
  border:1px solid rgba(255,180,58,.4);border-radius:var(--r-md);padding:16px 20px;font-size:.88rem;color:#8A6210;
}
.notice svg{width:20px;height:20px;flex:none;color:var(--amber);margin-top:2px}
.notice.blue{background:rgba(91,75,247,.07);border-color:rgba(91,75,247,.25);color:var(--primary-deep)}
.notice.blue svg{color:var(--primary)}

.modal{
  position:fixed;inset:0;z-index:120;display:none;align-items:center;justify-content:center;padding:22px;
  background:rgba(12,10,32,.72);
}
.modal.is-open{display:flex}
.modal-box{position:relative;background:var(--surface);border-radius:var(--r-lg);max-width:860px;width:100%;box-shadow:var(--sh-4);overflow:hidden}
.modal-close{
  position:absolute;top:12px;right:12px;z-index:3;width:40px;height:40px;border-radius:50%;
  background:rgba(18,16,50,.7);color:#fff;display:grid;place-items:center;
}
.modal-close svg{width:18px;height:18px}
.modal-stage{aspect-ratio:16/9;background:#191932;display:grid;place-items:center;color:#8F8AC9;font-size:.9rem}
.modal-stage svg{width:56px;height:56px;color:#fff;opacity:.85}
.modal-info{padding:20px 24px}
.modal-info h3{margin-bottom:6px}

.toast{
  position:fixed;left:50%;bottom:34px;transform:translate(-50%,20px);z-index:130;
  background:var(--ink);color:#fff;padding:12px 22px;border-radius:var(--r-full);
  font-size:.88rem;font-weight:600;opacity:0;pointer-events:none;transition:all .3s var(--ease);
  box-shadow:var(--sh-3);
}
.toast.is-show{opacity:1;transform:translate(-50%,0)}

.back-top{
  position:fixed;right:22px;bottom:26px;z-index:90;width:48px;height:48px;border-radius:50%;
  background:var(--grad-brand);color:#fff;display:grid;place-items:center;box-shadow:var(--sh-glow);
  opacity:0;pointer-events:none;transform:translateY(14px);transition:all .3s var(--ease);
}
.back-top.is-show{opacity:1;pointer-events:auto;transform:translateY(0)}
.back-top svg{width:20px;height:20px}

/* ---------- 18 页脚 ---------- */
.site-footer{background:var(--grad-ink);color:#B9B4EE;margin-top:clamp(48px,5vw,80px)}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding:clamp(44px,5vw,68px) 0 40px}
.site-footer h4{color:#fff;font-size:.98rem;margin-bottom:16px}
.site-footer a{color:#B9B4EE;font-size:.9rem;transition:color .2s}
.site-footer a:hover{color:#fff}
.footer-links{display:grid;gap:10px}
.footer-brand p{color:#8F8AC9;font-size:.88rem;margin:14px 0 18px}
.footer-social{display:flex;gap:10px}
.footer-social a{width:38px;height:38px;border-radius:12px;background:rgba(255,255,255,.09);display:grid;place-items:center}
.footer-social svg{width:18px;height:18px}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag-cloud a{font-size:.78rem;padding:5px 12px;border-radius:var(--r-full);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.1)}
.footer-disclaimer{
  border-top:1px solid rgba(255,255,255,.1);padding:22px 0;font-size:.76rem;color:#7D78B0;line-height:1.8;
}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0 26px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:.8rem;color:#8F8AC9}

/* ---------- 19 内页页头 ---------- */
.page-hero{
  position:relative;overflow:hidden;background:var(--grad-ink);color:#fff;
  padding:clamp(44px,5vw,72px) 0 clamp(52px,6vw,84px);
}
.page-hero::before{content:"";position:absolute;width:300px;height:300px;border-radius:50%;background:rgba(155,92,246,.3);filter:blur(70px);top:-90px;right:6%}
.page-hero::after{content:"";position:absolute;width:240px;height:240px;border-radius:50%;background:rgba(255,106,156,.2);filter:blur(60px);bottom:-110px;left:12%}
.page-hero .container{position:relative;z-index:1}
.page-hero h1{color:#fff;font-size:var(--fs-h1);margin-bottom:14px}
.page-hero p{color:#C7C2F0;font-size:var(--fs-lead);max-width:640px}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:.82rem;color:#9C96D8;margin-bottom:20px}
.crumbs a{color:#C7C2F0}
.crumbs a:hover{color:#fff}
.crumbs .sep{opacity:.5}

/* ---------- 20 分页 ---------- */
.pager{display:flex;justify-content:center;gap:10px;margin-top:40px}
.pager a,.pager span{
  min-width:42px;height:42px;padding:0 14px;border-radius:var(--r-full);display:inline-flex;align-items:center;justify-content:center;
  background:var(--surface);border:1px solid var(--line);font-weight:700;font-size:.9rem;color:var(--ink-2);
}
.pager a:hover{border-color:var(--primary);color:var(--primary)}
.pager .is-cur{background:var(--grad-brand);color:#fff;border-color:transparent}
.pager .gap{border:none;background:none;color:var(--soft)}

/* ---------- 21 滚动动效 ---------- */
.js-ready [data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease);animation:reveal-safety .01s linear 2.4s forwards}
.js-ready [data-reveal].is-in{opacity:1;transform:none}
@keyframes reveal-safety{to{opacity:1;transform:none}}

/* ---------- 22 响应式 ---------- */
@media (max-width:1080px){
  .vid-grid{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-side{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .hero-visual{min-height:430px}
}
@media (max-width:960px){
  .nav-toggle{display:grid}
  .nav-links{
    position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);z-index:100;
    background:var(--surface);flex-direction:column;align-items:stretch;gap:4px;
    padding:86px 24px 30px;box-shadow:var(--sh-4);
    transform:translateX(105%);transition:transform .35s var(--ease);
    overflow-y:auto;
  }
  .nav-links.is-open{transform:translateX(0)}
  .nav-links a{padding:13px 16px;border-radius:var(--r-sm);font-size:1rem}
  .nav-links a.is-active{background:rgba(91,75,247,.1)}
  .nav-links > .btn{display:inline-flex;margin-top:14px}
  .nav-close{
    display:grid;place-items:center;position:absolute;top:18px;right:20px;
    width:42px;height:42px;border-radius:50%;background:rgba(91,75,247,.08);color:var(--primary);z-index:2;
  }
  .nav-close svg{width:18px;height:18px}
  .split{grid-template-columns:1fr}
  .hero-visual{min-height:400px;margin-top:8px}
  .download-cards{grid-template-columns:1fr}
  .cta-inner{grid-template-columns:1fr}
  .topic-row{grid-template-columns:150px minmax(0,1fr)}
  .topic-row img{width:150px;height:92px}
  .topic-side{grid-column:1/-1;flex-direction:row;align-items:center;justify-content:space-between}
}
@media (max-width:680px){
  .grid-2,.grid-3,.grid-4,.vid-grid,.vid-grid-2{grid-template-columns:1fr}
  .hero-stats{gap:22px}
  .hero-stat b{font-size:1.3rem}
  .float-chip{padding:9px 12px;font-size:.74rem}
  .float-chip .fc-dot{width:28px;height:28px}
  .chip-a{top:2%}
  .chip-c{right:0;top:12%}
  .topic-row{grid-template-columns:1fr}
  .topic-row img{width:100%;height:180px}
  .footer-top{grid-template-columns:1fr}
  .btn-group .btn{flex:1 1 100%}
  .mascot{display:none}
  .rank-item{grid-template-columns:28px 82px minmax(0,1fr)}
  .rank-item img{width:82px;height:48px}
  .rank-end{grid-column:2/-1}
  .pager a,.pager span{min-width:38px;height:38px;padding:0 10px}
}
@media (max-width:420px){
  .container{padding:0 16px}
  .hero-phone{width:88%}
  .chip-b{left:0}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
  .js-ready [data-reveal]{opacity:1;transform:none}
  .ticker-track{animation:none}
}

/* ---------- 23 附加组件（内页专用） ---------- */
/* 步骤条 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:step}
.step{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;position:relative;box-shadow:var(--sh-1)}
.step-num{
  width:44px;height:44px;border-radius:14px;background:var(--grad-brand);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:1.1rem;margin-bottom:16px;box-shadow:var(--sh-glow);
}
.step h3{font-size:1.05rem;margin-bottom:8px}
.step p{font-size:.9rem;color:var(--muted)}

/* 时间线 */
.timeline{position:relative;padding-left:34px}
.timeline::before{content:"";position:absolute;left:11px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--primary),var(--pink));border-radius:2px}
.tl-item{position:relative;padding-bottom:26px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-30px;top:5px;width:14px;height:14px;border-radius:50%;
  background:var(--surface);border:3px solid var(--primary);box-shadow:0 0 0 4px rgba(91,75,247,.15);
}
.tl-item time{font-size:.78rem;font-weight:800;color:var(--primary);letter-spacing:.06em}
.tl-item h3{font-size:1rem;margin:4px 0 6px}
.tl-item p{font-size:.9rem;color:var(--muted)}

/* 证据分级表 */
.matrix-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--sh-1)}
.matrix{min-width:640px}
.matrix th{background:rgba(91,75,247,.07);text-align:left;padding:14px 18px;font-size:.85rem;font-weight:800;color:var(--primary-deep);white-space:nowrap}
.matrix td{padding:14px 18px;border-top:1px solid var(--line);font-size:.9rem;color:var(--ink-2);vertical-align:top}
.matrix tr:hover td{background:rgba(91,75,247,.03)}
.grade-pill{display:inline-block;font-weight:800;font-size:.78rem;padding:3px 12px;border-radius:var(--r-full);white-space:nowrap}
.g-s{background:rgba(20,201,165,.15);color:#0D9E82}
.g-a{background:rgba(91,75,247,.12);color:var(--primary-deep)}
.g-b{background:rgba(255,180,58,.18);color:#B5730A}
.g-c{background:rgba(255,90,90,.13);color:#D64545}

/* 通用封面 */
.cover-media{border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-3);position:relative}
.cover-media img{width:100%;object-fit:cover}

/* 联系/订阅表单 */
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(24px,3vw,36px);box-shadow:var(--sh-2)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:grid;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:.85rem;font-weight:700;color:var(--ink-2)}
.field input,.field textarea,.field select{
  border:1.5px solid var(--line);border-radius:var(--r-sm);padding:12px 15px;font-size:.94rem;background:var(--bg);
  transition:border-color .2s,box-shadow .2s;width:100%;
}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(91,75,247,.12);background:#fff}
.field textarea{min-height:120px;resize:vertical}
.form-note{font-size:.76rem;color:var(--soft);margin-top:12px}

/* 值卡 */
.value-card{position:relative;overflow:hidden}
.value-card::after{content:"";position:absolute;width:130px;height:130px;border-radius:50%;background:rgba(91,75,247,.06);top:-40px;right:-40px}

/* 更新日志 */
.log-item{display:grid;grid-template-columns:120px minmax(0,1fr);gap:18px;padding:18px 0;border-top:1px dashed var(--line)}
.log-item:first-of-type{border-top:none}
.log-item time{font-weight:800;color:var(--primary);font-size:.88rem}
.log-item b{display:block;margin-bottom:4px}
.log-item p{font-size:.88rem;color:var(--muted)}
.ver-pill{display:inline-block;font-size:.72rem;font-weight:800;padding:2px 10px;border-radius:var(--r-full);background:rgba(20,201,165,.14);color:#0D9E82;margin-left:8px;vertical-align:2px}

/* 功能矩阵（下载页） */
@media (max-width:960px){
  .steps{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .log-item{grid-template-columns:1fr;gap:6px}
}
@media (max-width:680px){
  .log-item time{font-size:.8rem}
}