/* ============================================================
   豆芽社 DouyaClub — 设计系统
   组织顺序：1 变量 → 2 重置 → 3 布局 → 4 文字 → 5 按钮 → 6 头部
   → 7 卡片 → 8 Hero → 9 跑马灯 → 10 视频卡 → 11 榜单 → 12 文章列表
   → 13 数据/特性 → 14 评价 → 15 CTA → 16 FAQ → 17 弹层/提示
   → 18 页脚 → 19 内页页头 → 20 分页 → 21 滚动动画 → 22 响应式
   → 23 附加组件
   ============================================================ */

/* ---------- 1 设计变量 ---------- */
:root{
  /* 品牌色三档 */
  --green:#1fb56d;
  --green-dark:#0e7a4b;
  --green-deep:#0b3d2a;
  --green-light:#e4f7ec;
  /* 点缀色 */
  --pink:#ff6f91;
  --pink-light:#ffe9ef;
  --yellow:#ffc53d;
  --violet:#7c6cf6;
  --sky:#38bdf8;
  /* 中性色 */
  --ink:#142019;
  --ink-2:#3c4a42;
  --muted:#6b7a71;
  --line:#e4ece6;
  --bg:#fbfdf9;
  --bg-soft:#f2f8f2;
  --card:#ffffff;
  --dark:#0c1712;
  /* 渐变 */
  --grad-green:linear-gradient(135deg,#1fb56d 0%,#38d98b 100%);
  --grad-warm:linear-gradient(135deg,#ff6f91 0%,#ffc53d 100%);
  --grad-dark:linear-gradient(160deg,#0c1712 0%,#123a28 60%,#155a3a 100%);
  /* 圆角 */
  --r-sm:10px; --r-md:16px; --r-lg:24px; --r-xl:32px; --r-2xl:40px; --r-full:999px;
  /* 阴影 */
  --sh-1:0 2px 8px rgba(20,32,25,.06);
  --sh-2:0 6px 20px rgba(20,32,25,.08);
  --sh-3:0 14px 36px rgba(20,32,25,.12);
  --sh-4:0 24px 60px rgba(20,32,25,.16);
  --sh-green:0 10px 28px rgba(31,181,109,.30);
  /* 字号（流式） */
  --fs-xs:clamp(.78rem,.74rem + .2vw,.85rem);
  --fs-sm:clamp(.88rem,.85rem + .2vw,.95rem);
  --fs-base:clamp(1rem,.96rem + .25vw,1.08rem);
  --fs-lg:clamp(1.15rem,1.05rem + .5vw,1.35rem);
  --fs-xl:clamp(1.35rem,1.15rem + 1vw,1.85rem);
  --fs-2xl:clamp(1.7rem,1.3rem + 2vw,2.6rem);
  --fs-hero:clamp(2.1rem,1.4rem + 3.6vw,3.9rem);
  /* 布局 */
  --container:1180px;
  --gutter:clamp(18px,4vw,36px);
  --ease:cubic-bezier(.22,.8,.32,1);
  /* 字体 */
  --font:"Outfit","Noto Sans SC",-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
}

/* ---------- 2 基础重置 ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--font);
  font-size:var(--fs-base);
  line-height:1.7;
  color:var(--ink);
  background:var(--bg);
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
input,textarea,select{font-family:inherit;font-size:1rem;}
:focus-visible{outline:3px solid rgba(31,181,109,.45);outline-offset:2px;border-radius:6px;}
::selection{background:var(--green);color:#fff;}

/* ---------- 3 布局工具 ---------- */
.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:var(--gutter);}
.section{padding-block:clamp(56px,8vw,104px);}
.section-soft{background:var(--bg-soft);}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.grid-side{display:grid;grid-template-columns:1.6fr .9fr;gap:32px;align-items:start;}
.center{text-align:center;}
.mt-s{margin-top:18px;} .mt-m{margin-top:32px;} .mt-l{margin-top:52px;}

/* ---------- 4 文字标题组件 ---------- */
h1,h2,h3,h4,h5{line-height:1.28;margin:0;font-weight:800;letter-spacing:-.01em;color:var(--ink);}
.h2{font-size:var(--fs-2xl);}
.h3{font-size:var(--fs-xl);}
.lead{font-size:var(--fs-lg);color:var(--ink-2);max-width:640px;}
p{margin:0 0 1em;}
.muted{color:var(--muted);}
.small{font-size:var(--fs-sm);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:var(--fs-xs);font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--green-dark);background:var(--green-light);
  padding:7px 14px;border-radius:var(--r-full);margin-bottom:16px;
}
.eyebrow::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--green);}
.hl{position:relative;z-index:0;white-space:nowrap;}
.hl::after{
  content:"";position:absolute;left:-2px;right:-2px;bottom:4px;height:.42em;
  background:linear-gradient(90deg,rgba(255,197,61,.55),rgba(255,197,61,.15));
  border-radius:6px;z-index:-1;
}

/* ---------- 5 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-weight:700;font-size:var(--fs-base);
  padding:14px 28px;border-radius:var(--r-full);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease);
  will-change:transform;
}
.btn:hover{transform:translateY(-2px);}
.btn:active{transform:translateY(0);}
.btn-primary{background:var(--grad-green);color:#fff;box-shadow:var(--sh-green);}
.btn-primary:hover{box-shadow:0 14px 34px rgba(31,181,109,.42);}
.btn-dark{background:var(--ink);color:#fff;}
.btn-dark:hover{background:#22332a;}
.btn-ghost{background:#fff;color:var(--ink);border:2px solid var(--line);}
.btn-ghost:hover{border-color:var(--green);color:var(--green-dark);}
.btn-warm{background:var(--grad-warm);color:#5c1424;box-shadow:0 10px 26px rgba(255,111,145,.32);}
.btn-sm{padding:10px 20px;font-size:var(--fs-sm);}
.btn-lg{padding:17px 36px;font-size:var(--fs-lg);}
.btn-group{display:flex;flex-wrap:wrap;gap:14px;}
.btn-block{width:100%;}
.link-more{display:inline-flex;align-items:center;gap:6px;font-weight:700;color:var(--green-dark);}
.link-more:hover{gap:10px;}
.link-more{transition:gap .25s var(--ease);}

/* ---------- 6 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(251,253,249,.86);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .3s,box-shadow .3s;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:var(--sh-1);}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;height:74px;}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:1.3rem;letter-spacing:-.02em;}
.logo-mark{
  width:40px;height:40px;border-radius:14px;flex:none;
  background:var(--grad-green);display:grid;place-items:center;
  box-shadow:var(--sh-green);color:#fff;
}
.logo-mark svg{width:24px;height:24px;}
.logo em{font-style:normal;color:var(--green-dark);}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{
  padding:9px 16px;border-radius:var(--r-full);
  font-weight:600;font-size:var(--fs-sm);color:var(--ink-2);
  transition:background .2s,color .2s;
}
.nav-links a:hover{background:var(--green-light);color:var(--green-dark);}
.nav-links a.is-active{background:var(--green-deep);color:#fff;}
.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:46px;height:46px;border-radius:14px;
  background:#fff;border:2px solid var(--line);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2.4px;border-radius:2px;background:var(--ink);transition:transform .3s var(--ease),opacity .3s;}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7.4px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7.4px) rotate(-45deg);}
.nav-scrim{
  position:fixed;inset:0;background:rgba(12,23,18,.5);z-index:70;
  opacity:0;pointer-events:none;transition:opacity .3s;
}
.nav-scrim.is-visible{opacity:1;pointer-events:auto;}

/* ---------- 7 卡片 ---------- */
.card{
  background:var(--card);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),border-color .3s;
  position:relative;
}
.card:hover{transform:translateY(-5px);box-shadow:var(--sh-3);border-color:rgba(31,181,109,.35);}
.card h3{margin-bottom:8px;font-size:var(--fs-lg);}
.card p{color:var(--ink-2);margin:0;}
.card-icon{
  width:52px;height:52px;border-radius:16px;display:grid;place-items:center;
  font-size:1.5rem;margin-bottom:16px;flex:none;
}
.ci-green{background:var(--green-light);color:var(--green-dark);}
.ci-pink{background:var(--pink-light);color:var(--pink);}
.ci-yellow{background:#fff5dd;color:#b07d0a;}
.ci-violet{background:#efeaff;color:var(--violet);}
.ci-sky{background:#e3f6ff;color:#0e8ab5;}

/* ---------- 8 Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding-block:clamp(48px,7vw,96px) clamp(56px,8vw,110px);
  background:
    radial-gradient(600px 340px at 88% 6%,rgba(255,197,61,.16),transparent 70%),
    radial-gradient(560px 380px at 4% 88%,rgba(124,108,246,.12),transparent 70%),
    radial-gradient(520px 320px at 78% 92%,rgba(255,111,145,.10),transparent 70%),
    var(--bg);
}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(32px,5vw,72px);align-items:center;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-full);
  padding:8px 16px;font-size:var(--fs-xs);font-weight:700;color:var(--ink-2);
  box-shadow:var(--sh-1);margin-bottom:22px;
}
.hero-badge b{color:var(--green-dark);}
.hero h1{font-size:var(--fs-hero);margin-bottom:20px;}
.hero .lead{margin-bottom:30px;}
.hero-cta{margin-bottom:38px;}
.hero-note{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:var(--fs-sm);}
.hero-note svg{flex:none;color:var(--green);}

/* 手机模型 + 浮层 */
.hero-visual{position:relative;display:grid;place-items:center;min-height:480px;}
.phone{
  width:min(300px,78%);aspect-ratio:9/18.6;
  background:var(--dark);border-radius:42px;padding:12px;
  box-shadow:var(--sh-4);position:relative;z-index:2;
  border:3px solid #23342b;
}
.phone-screen{
  width:100%;height:100%;border-radius:32px;overflow:hidden;position:relative;background:#000;
}
.phone-screen img{width:100%;height:100%;object-fit:cover;}
.phone-top{
  position:absolute;top:14px;left:50%;transform:translateX(-50%);
  width:86px;height:22px;background:#0c1712;border-radius:12px;z-index:3;
}
.float-card{
  position:absolute;background:#fff;border-radius:var(--r-md);
  box-shadow:var(--sh-3);padding:14px 18px;z-index:3;
  animation:bob 4.5s ease-in-out infinite;
}
.float-card .fc-title{font-weight:800;font-size:var(--fs-sm);display:flex;align-items:center;gap:8px;}
.float-card .fc-sub{font-size:var(--fs-xs);color:var(--muted);}
.fc-1{top:6%;left:0;}
.fc-2{bottom:12%;right:0;animation-delay:-2.2s;}
.fc-3{top:44%;right:-4%;animation-delay:-1.1s;}
@keyframes bob{0%,100%{transform:translateY(0);}50%{transform:translateY(-12px);}}
.blob{
  position:absolute;border-radius:50%;filter:blur(2px);z-index:1;
}
.blob-1{width:230px;height:230px;background:rgba(31,181,109,.14);top:-4%;right:8%;}
.blob-2{width:150px;height:150px;background:rgba(255,197,61,.20);bottom:2%;left:4%;}
.blob-3{width:110px;height:110px;background:rgba(124,108,246,.14);top:30%;left:16%;}

/* ---------- 9 跑马灯 ---------- */
.marquee{
  overflow:hidden;background:var(--green-deep);color:#fff;
  padding-block:14px;white-space:nowrap;
}
.marquee-track{display:inline-flex;gap:44px;animation:scroll 30s linear infinite;padding-right:44px;}
.marquee:hover .marquee-track{animation-play-state:paused;}
.marquee span{display:inline-flex;align-items:center;gap:10px;font-weight:600;font-size:var(--fs-sm);opacity:.92;}
.marquee .dot{width:7px;height:7px;border-radius:50%;background:var(--yellow);flex:none;}
@keyframes scroll{from{transform:translateX(0);}to{transform:translateX(-50%);}}

/* ---------- 10 视频卡 ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px;}
.chip{
  padding:9px 20px;border-radius:var(--r-full);font-weight:700;font-size:var(--fs-sm);
  background:#fff;border:2px solid var(--line);color:var(--ink-2);
  transition:all .22s var(--ease);
}
.chip:hover{border-color:var(--green);color:var(--green-dark);}
.chip.is-active{background:var(--green-deep);border-color:var(--green-deep);color:#fff;}
.video-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;}
.video-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
  cursor:pointer;text-align:left;padding:0;width:100%;
}
.video-card:hover{transform:translateY(-6px);box-shadow:var(--sh-3);}
.thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--bg-soft);}
.thumb img{width:100%;height:100%;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(12,23,18,.55));
}
.duration{
  position:absolute;right:10px;bottom:10px;z-index:2;
  background:rgba(12,23,18,.82);color:#fff;font-size:.72rem;font-weight:700;
  padding:3px 9px;border-radius:8px;letter-spacing:.03em;
}
.thumb-tag{
  position:absolute;left:10px;top:10px;z-index:2;
  background:var(--grad-warm);color:#5c1424;font-size:.72rem;font-weight:800;
  padding:4px 11px;border-radius:var(--r-full);
}
.thumb-tag.t-green{background:var(--grad-green);color:#fff;}
.thumb-tag.t-violet{background:var(--violet);color:#fff;}
.thumb-tag.t-sky{background:var(--sky);color:#04364a;}
.play-btn{
  position:absolute;inset:0;margin:auto;z-index:2;
  width:54px;height:54px;border-radius:50%;
  background:rgba(255,255,255,.94);color:var(--green-dark);
  display:grid;place-items:center;box-shadow:var(--sh-2);
  transition:transform .3s var(--ease);
}
.video-card:hover .play-btn{transform:scale(1.12);}
.play-btn svg{width:20px;height:20px;margin-left:3px;}
.v-meta{padding:15px 17px 17px;}
.v-meta h3{font-size:var(--fs-sm);font-weight:700;line-height:1.5;margin-bottom:7px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.v-meta .v-info{font-size:var(--fs-xs);color:var(--muted);display:flex;gap:12px;}

/* ---------- 11 榜单 ---------- */
.rank-list{display:flex;flex-direction:column;}
.rank-item{
  display:flex;align-items:center;gap:16px;
  padding:15px 6px;border-bottom:1px dashed var(--line);
  transition:background .2s;border-radius:12px;
}
.rank-item:last-child{border-bottom:none;}
.rank-item:hover{background:var(--bg-soft);}
.rank-num{
  width:34px;height:34px;flex:none;border-radius:11px;display:grid;place-items:center;
  font-weight:800;font-size:.95rem;background:var(--bg-soft);color:var(--muted);
}
.rank-item:nth-child(1) .rank-num{background:var(--grad-warm);color:#5c1424;}
.rank-item:nth-child(2) .rank-num{background:#ffe3c2;color:#a14e10;}
.rank-item:nth-child(3) .rank-num{background:#fff2b8;color:#8a6a06;}
.rank-body{flex:1;min-width:0;}
.rank-body h3{font-size:var(--fs-sm);font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.rank-body p{font-size:var(--fs-xs);color:var(--muted);margin:0;}
.trend{flex:none;font-size:var(--fs-xs);font-weight:800;display:inline-flex;align-items:center;gap:3px;}
.trend.up{color:#e0447c;}
.trend.hot{color:#d97706;}
.trend.flat{color:var(--muted);}

/* ---------- 12 话题/文章列表 ---------- */
.post-list{display:flex;flex-direction:column;gap:20px;}
.post-item{
  display:grid;grid-template-columns:220px 1fr;gap:24px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease);
}
.post-item:hover{transform:translateY(-4px);box-shadow:var(--sh-3);}
.post-thumb{position:relative;min-height:160px;}
.post-thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.post-body{padding:22px 26px 22px 0;}
.post-meta{display:flex;flex-wrap:wrap;gap:14px;font-size:var(--fs-xs);color:var(--muted);margin-bottom:8px;}
.post-meta .cat{color:var(--green-dark);font-weight:800;}
.post-body h3{font-size:var(--fs-lg);margin-bottom:8px;}
.post-body p{font-size:var(--fs-sm);color:var(--ink-2);margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.pill{
  display:inline-block;padding:3px 12px;border-radius:var(--r-full);
  font-size:var(--fs-xs);font-weight:700;
  background:var(--green-light);color:var(--green-dark);
}
.pill.p-pink{background:var(--pink-light);color:var(--pink);}
.pill.p-violet{background:#efeaff;color:var(--violet);}
.pill.p-yellow{background:#fff5dd;color:#b07d0a;}

/* ---------- 13 数据/特性 ---------- */
.stats-band{background:var(--grad-dark);border-radius:var(--r-2xl);color:#fff;
  padding:clamp(34px,5vw,58px);position:relative;overflow:hidden;}
.stats-band::before{
  content:"";position:absolute;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(56,217,139,.25),transparent 70%);
  top:-120px;right:-80px;
}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative;}
.stat{text-align:center;}
.stat .num{font-size:var(--fs-2xl);font-weight:800;letter-spacing:-.02em;
  background:linear-gradient(120deg,#7dedb1,#ffe08a);-webkit-background-clip:text;background-clip:text;color:transparent;}
.stat .label{font-size:var(--fs-sm);opacity:.78;margin-top:4px;}
.feature-row{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.step-list{counter-reset:step;display:flex;flex-direction:column;gap:0;}
.step{
  display:grid;grid-template-columns:56px 1fr;gap:20px;align-items:start;
  padding:26px 0;border-bottom:1px dashed var(--line);
}
.step:last-child{border-bottom:none;}
.step-num{
  counter-increment:step;width:52px;height:52px;border-radius:18px;
  background:var(--grad-green);color:#fff;display:grid;place-items:center;
  font-weight:800;font-size:1.15rem;box-shadow:var(--sh-green);flex:none;
}
.step-num::before{content:counter(step);}
.step h3{font-size:var(--fs-lg);margin-bottom:6px;}
.step p{margin:0;color:var(--ink-2);font-size:var(--fs-sm);}

/* ---------- 14 评价 ---------- */
.review-card{display:flex;flex-direction:column;gap:16px;}
.review-stars{color:#f5a623;letter-spacing:2px;font-size:.9rem;}
.review-text{color:var(--ink-2);font-size:var(--fs-sm);margin:0;flex:1;}
.review-user{display:flex;align-items:center;gap:12px;}
.review-user img{width:46px;height:46px;border-radius:50%;object-fit:cover;flex:none;}
.review-user .ru-name{font-weight:800;font-size:var(--fs-sm);}
.review-user .ru-tag{font-size:var(--fs-xs);color:var(--muted);}

/* ---------- 15 CTA/下载 ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--grad-dark);border-radius:var(--r-2xl);
  padding:clamp(44px,6vw,76px);text-align:center;color:#fff;
}
.cta-band::before,.cta-band::after{
  content:"";position:absolute;border-radius:50%;filter:blur(6px);
}
.cta-band::before{width:280px;height:280px;background:radial-gradient(circle,rgba(56,217,139,.28),transparent 70%);top:-110px;left:-70px;}
.cta-band::after{width:240px;height:240px;background:radial-gradient(circle,rgba(255,197,61,.24),transparent 70%);bottom:-100px;right:-60px;}
.cta-band h2,.cta-band h3{color:#fff;}
.cta-band p{color:rgba(255,255,255,.82);max-width:560px;margin-inline:auto;}
.cta-band .btn-group{justify-content:center;margin-top:30px;}
.store-btn{
  display:inline-flex;align-items:center;gap:12px;
  background:rgba(255,255,255,.10);border:1.5px solid rgba(255,255,255,.35);
  color:#fff;border-radius:var(--r-md);padding:12px 22px;
  transition:background .25s,transform .25s var(--ease);
}
.store-btn:hover{background:rgba(255,255,255,.2);transform:translateY(-2px);}
.store-btn .sb-icon{font-size:1.5rem;line-height:1;}
.store-btn .sb-text{display:flex;flex-direction:column;text-align:left;line-height:1.3;}
.store-btn .sb-small{font-size:.68rem;opacity:.8;}
.store-btn .sb-big{font-weight:800;font-size:var(--fs-base);}

/* ---------- 16 FAQ ---------- */
.faq{display:flex;flex-direction:column;gap:14px;max-width:820px;margin-inline:auto;}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  transition:border-color .25s,box-shadow .25s;}
.faq-item.is-open{border-color:rgba(31,181,109,.45);box-shadow:var(--sh-2);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:19px 24px;text-align:left;font-weight:700;font-size:var(--fs-base);color:var(--ink);
}
.faq-q .faq-arrow{
  width:30px;height:30px;flex:none;border-radius:10px;display:grid;place-items:center;
  background:var(--green-light);color:var(--green-dark);
  transition:transform .3s var(--ease);
}
.faq-item.is-open .faq-arrow{transform:rotate(45deg);background:var(--green);color:#fff;}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s var(--ease);}
.faq-a-inner{padding:0 24px 20px;color:var(--ink-2);font-size:var(--fs-sm);}

/* ---------- 17 提示条/弹层 ---------- */
.toast{
  position:fixed;left:50%;bottom:34px;transform:translate(-50%,20px);
  background:var(--ink);color:#fff;padding:13px 26px;border-radius:var(--r-full);
  font-size:var(--fs-sm);font-weight:600;z-index:100;opacity:0;pointer-events:none;
  transition:opacity .3s,transform .3s var(--ease);box-shadow:var(--sh-3);
}
.toast.is-visible{opacity:1;transform:translate(-50%,0);}
.modal{
  position:fixed;inset:0;z-index:90;display:grid;place-items:center;padding:20px;
  background:rgba(12,23,18,.78);backdrop-filter:blur(6px);
  opacity:0;pointer-events:none;transition:opacity .3s;
}
.modal.is-open{opacity:1;pointer-events:auto;}
.modal-box{
  position:relative;width:min(860px,100%);background:#0c1712;
  border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-4);
  transform:scale(.94);transition:transform .3s var(--ease);
}
.modal.is-open .modal-box{transform:scale(1);}
.modal-media{aspect-ratio:16/9;background:#000;display:grid;place-items:center;}
.modal-media img{width:100%;height:100%;object-fit:cover;opacity:.85;}
.modal-play{
  width:80px;height:80px;border-radius:50%;background:var(--grad-green);
  display:grid;place-items:center;color:#fff;box-shadow:var(--sh-green);
}
.modal-play svg{width:30px;height:30px;margin-left:4px;}
.modal-meta{padding:20px 26px;color:#fff;}
.modal-meta h3{color:#fff;font-size:var(--fs-lg);margin-bottom:6px;}
.modal-meta p{color:rgba(255,255,255,.7);font-size:var(--fs-sm);margin:0;}
.modal-close{
  position:absolute;top:14px;right:14px;z-index:3;
  width:42px;height:42px;border-radius:50%;
  background:rgba(12,23,18,.65);color:#fff;display:grid;place-items:center;
  transition:background .2s;
}
.modal-close:hover{background:var(--pink);}
.modal-close svg{width:18px;height:18px;}

.back-top{
  position:fixed;right:22px;bottom:24px;z-index:80;
  width:48px;height:48px;border-radius:16px;
  background:var(--grad-green);color:#fff;
  display:grid;place-items:center;box-shadow:var(--sh-green);
  opacity:0;pointer-events:none;transform:translateY(14px);
  transition:opacity .3s,transform .3s var(--ease);
}
.back-top.is-visible{opacity:1;pointer-events:auto;transform:none;}
.back-top:hover{transform:translateY(-3px);}

/* ---------- 18 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.78);margin-top:clamp(56px,8vw,96px);}
.footer-top{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:36px;
  padding-block:clamp(44px,6vw,64px) 36px;
}
.footer-brand .logo{color:#fff;margin-bottom:14px;display:inline-flex;}
.footer-brand p{font-size:var(--fs-sm);color:rgba(255,255,255,.62);max-width:300px;}
.site-footer h4{color:#fff;font-size:var(--fs-sm);margin-bottom:16px;letter-spacing:.04em;}
.footer-col li{margin-bottom:10px;}
.footer-col a{font-size:var(--fs-sm);color:rgba(255,255,255,.62);transition:color .2s;}
.footer-col a:hover{color:#7dedb1;}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;}
.tag-cloud a{
  font-size:var(--fs-xs);padding:5px 13px;border-radius:var(--r-full);
  background:rgba(255,255,255,.08);color:rgba(255,255,255,.66);
  transition:background .2s,color .2s;
}
.tag-cloud a:hover{background:var(--green);color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding-block:22px;display:flex;flex-wrap:wrap;gap:12px;
  align-items:center;justify-content:space-between;
  font-size:var(--fs-xs);color:rgba(255,255,255,.45);
}
.disclaimer{
  font-size:var(--fs-xs);color:rgba(255,255,255,.4);
  padding-bottom:26px;max-width:900px;line-height:1.8;
}

/* ---------- 19 内页页头 ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding-block:clamp(48px,6vw,80px) clamp(40px,5vw,64px);
  background:
    radial-gradient(520px 300px at 90% 10%,rgba(255,197,61,.14),transparent 70%),
    radial-gradient(480px 300px at 8% 90%,rgba(31,181,109,.12),transparent 70%),
    var(--bg-soft);
}
.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:var(--fs-xs);color:var(--muted);margin-bottom:18px;}
.breadcrumb a:hover{color:var(--green-dark);}
.breadcrumb .sep{opacity:.5;}
.page-hero h1{font-size:var(--fs-2xl);margin-bottom:14px;max-width:720px;}
.page-hero .lead{font-size:var(--fs-base);}
.page-hero .hero-cta{margin-bottom:0;}

/* ---------- 20 分页 ---------- */
.pagination{display:flex;justify-content:center;gap:8px;margin-top:44px;}
.pagination a,.pagination span{
  min-width:44px;height:44px;display:inline-grid;place-items:center;
  border-radius:14px;font-weight:700;font-size:var(--fs-sm);
  border:2px solid var(--line);background:#fff;color:var(--ink-2);
  transition:all .2s;padding-inline:10px;
}
.pagination a:hover{border-color:var(--green);color:var(--green-dark);}
.pagination .is-current{background:var(--green-deep);border-color:var(--green-deep);color:#fff;}
.pagination .disabled{opacity:.4;pointer-events:none;}

/* ---------- 21 滚动动画 ---------- */
[data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease);}
[data-reveal].is-revealed{opacity:1;transform:none;}
[data-reveal][data-delay="1"]{transition-delay:.12s;}
[data-reveal][data-delay="2"]{transition-delay:.24s;}
[data-reveal][data-delay="3"]{transition-delay:.36s;}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;}
  [data-reveal]{opacity:1;transform:none;}
}

/* ---------- 22 响应式 ---------- */
@media (max-width:1080px){
  .video-grid{grid-template-columns:repeat(3,1fr);}
  .grid-4{grid-template-columns:repeat(2,1fr);}
  .footer-top{grid-template-columns:1fr 1fr;}
  .hero-inner{grid-template-columns:1fr .9fr;}
  .grid-side{grid-template-columns:1.4fr .9fr;}
}
@media (max-width:960px){
  .nav-toggle{display:flex;}
  .nav-links{
    position:fixed;top:0;right:0;bottom:0;z-index:80;
    width:min(320px,84vw);background:#fff;
    flex-direction:column;align-items:stretch;gap:6px;
    padding:96px 26px 40px;box-shadow:var(--sh-4);
    transform:translateX(105%);transition:transform .35s var(--ease);
    overflow-y:auto;
  }
  .nav-links.is-open{transform:none;}
  .nav-links a{padding:14px 18px;font-size:var(--fs-base);border-radius:var(--r-md);}
  .nav-actions .btn-nav{display:none;}
  .hero-inner{grid-template-columns:1fr;}
  .hero-visual{min-height:430px;order:-1;}
  .grid-3,.grid-2{grid-template-columns:1fr 1fr;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .grid-side{grid-template-columns:1fr;}
  .feature-row{grid-template-columns:1fr;}
  .float-card{transform:scale(.88);}
  .fc-1{transform-origin:bottom left;}
  .fc-2{transform-origin:top right;}
  .fc-3{transform-origin:bottom left;}
  .fc-3{right:0;}
}
@media (max-width:680px){
  .grid-3,.grid-2,.grid-4,.video-grid{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:1fr 1fr;gap:20px;}
  .post-item{grid-template-columns:1fr;}
  .post-thumb{aspect-ratio:16/8;position:relative;min-height:0;}
  .post-body{padding:0 22px 22px;}
  .footer-top{grid-template-columns:1fr;}
  .btn-group .btn{flex:1 1 100%;}
  .hero-visual{min-height:0;padding-block:10px;}
  .float-card{display:none;}
  .phone{width:min(250px,72%);}
  .section{padding-block:52px;}
  .review-user{flex-wrap:wrap;}
}
@media (max-width:420px){
  .stats-grid{grid-template-columns:1fr;}
  .nav{height:66px;}
  .thumb-tag{font-size:.68rem;}
}

/* ---------- 23 附加组件（内页专用） ---------- */
/* 评论 */
.comment{
  display:flex;gap:14px;padding:20px 0;border-bottom:1px dashed var(--line);
}
.comment:last-child{border-bottom:none;}
.comment img{width:44px;height:44px;border-radius:50%;object-fit:cover;flex:none;}
.comment-body{flex:1;min-width:0;}
.comment-head{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:4px;}
.comment-head .c-name{font-weight:800;font-size:var(--fs-sm);}
.comment-head .c-time{font-size:var(--fs-xs);color:var(--muted);}
.comment-head .c-like{margin-left:auto;font-size:var(--fs-xs);color:var(--muted);display:inline-flex;align-items:center;gap:4px;}
.comment p{font-size:var(--fs-sm);color:var(--ink-2);margin:0;}
/* 订阅表单 */
.subscribe{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-2xl);
  padding:clamp(30px,4vw,48px);box-shadow:var(--sh-2);text-align:center;
}
.subscribe-form{display:flex;gap:12px;max-width:520px;margin:22px auto 0;}
.subscribe-form input{
  flex:1;min-width:0;padding:14px 20px;border-radius:var(--r-full);
  border:2px solid var(--line);font-size:var(--fs-sm);outline:none;
  transition:border-color .2s;
}
.subscribe-form input:focus{border-color:var(--green);}
/* 长文排版 */
.prose{max-width:760px;}
.prose h2{font-size:var(--fs-xl);margin:2.2em 0 .7em;}
.prose h3{font-size:var(--fs-lg);margin:1.8em 0 .6em;}
.prose p{color:var(--ink-2);}
.prose blockquote{
  margin:1.6em 0;padding:18px 24px;border-left:4px solid var(--green);
  background:var(--green-light);border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--green-deep);font-weight:600;
}
.prose ul{list-style:disc;padding-left:1.4em;margin-bottom:1em;color:var(--ink-2);}
.prose ul li{margin-bottom:.4em;}
/* 对比表 */
.compare{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);}
.compare th,.compare td{padding:15px 18px;text-align:left;font-size:var(--fs-sm);border-bottom:1px solid var(--line);}
.compare th{background:var(--green-deep);color:#fff;font-weight:700;}
.compare tr:last-child td{border-bottom:none;}
.compare tr:nth-child(even) td{background:var(--bg-soft);}
.compare td:first-child{font-weight:700;color:var(--ink);}
.compare .yes{color:var(--green-dark);font-weight:800;}
.compare .no{color:#c76a7f;font-weight:800;}
@media (max-width:680px){
  .subscribe-form{flex-direction:column;}
  .compare{display:block;overflow-x:auto;}
  .fc-3{display:none;}
  .prose{max-width:100%;}
}
@media (max-width:960px) and (min-width:681px){
  .subscribe-form{flex-direction:row;}
}