/* ==========================================================
   Echo麦序助手 · 官网
   ========================================================== */
:root{
  --blue:#3E86F5;
  --blue-d:#2E73E0;
  --blue-l:#EAF0FF;
  --ink:#0F172A;
  --ink-2:#334155;
  --muted:#64748B;
  --line:#E7EBF2;
  --bg:#FFFFFF;
  --bg-soft:#F7F9FC;
  --radius:20px;
  --maxw:1200px;
  --pad:clamp(20px,4vw,40px);
  --shadow:0 24px 60px rgba(15,23,42,.10);
  --shadow-sm:0 10px 28px rgba(15,23,42,.07);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img,svg{display:block}
::selection{background:var(--blue);color:#fff}
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-thumb{background:#CBD5E1;border-radius:99px}
::-webkit-scrollbar-thumb:hover{background:#94A3B8}
::-webkit-scrollbar-track{background:#F1F5F9}

.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.section{padding:clamp(64px,7.5vw,104px) 0}
.sec-title{font-size:clamp(26px,3.2vw,36px);font-weight:800;letter-spacing:-.02em;line-height:1.25}
.sec-sub{color:var(--muted);font-size:15px;margin-top:12px}
.sec-head{max-width:640px;margin:0 auto clamp(34px,4vw,52px);text-align:center}
.mono{font-variant-numeric:tabular-nums}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-family:inherit;font-size:14.5px;font-weight:600;letter-spacing:.01em;
  padding:13px 24px;border-radius:12px;border:1px solid transparent;cursor:pointer;
  transition:transform .18s,box-shadow .25s,background .2s,color .2s,border-color .2s;
}
.btn:active{transform:translateY(1px)}
.btn-blue{background:linear-gradient(180deg,#4C92F7,var(--blue-d));color:#fff;box-shadow:0 12px 26px rgba(62,134,245,.32)}
.btn-blue:hover{background:linear-gradient(180deg,var(--blue),var(--blue-d));box-shadow:0 16px 36px rgba(62,134,245,.44)}
.btn-white{background:#fff;color:var(--ink);box-shadow:0 10px 24px rgba(15,23,42,.12)}
.btn-white:hover{color:var(--blue)}
.btn-ghost-w{border-color:rgba(255,255,255,.5);color:#fff;background:rgba(255,255,255,.06)}
.btn-ghost-w:hover{background:rgba(255,255,255,.16)}
.btn-brand{background:linear-gradient(180deg,#4C92F7,var(--blue-d));color:#fff;box-shadow:0 12px 26px rgba(62,134,245,.32)}
.btn-brand:hover{background:linear-gradient(180deg,var(--blue),var(--blue-d));box-shadow:0 16px 36px rgba(62,134,245,.44)}
.btn-line{border-color:var(--line);color:var(--ink-2);background:#fff}
.btn-line:hover{border-color:var(--blue);color:var(--blue)}

/* ---------- 顶栏（浅色不透明） ---------- */
.topbar{position:fixed;inset:0 0 auto;z-index:90;height:72px;background:rgba(255,255,255,.9);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--line);box-shadow:0 6px 22px rgba(15,23,42,.05);transition:box-shadow .3s}
.nav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.logo{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--ink)}
.logo img{width:28px;height:28px;flex:0 0 auto;display:block}

.menu{display:flex;align-items:center;gap:26px;margin-left:auto}
.menu a{font-size:14px;color:var(--ink-2);transition:color .2s;position:relative;padding:4px 0}
.menu a:hover{color:var(--blue)}
.menu a.active{color:var(--blue)}
.menu a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;border-radius:2px;background:var(--blue)}
.nav-right{display:flex;align-items:center;gap:10px}
.burger{display:none;width:42px;height:40px;border:1px solid var(--line);border-radius:11px;background:#fff;cursor:pointer}
.burger s{display:block;width:16px;height:1.6px;background:var(--ink);margin:4px auto;transition:.25s;border-radius:2px}
.burger.on s:nth-child(2){opacity:0}
.burger.on s:nth-child(1){transform:translateY(5.6px) rotate(45deg)}
.burger.on s:nth-child(3){transform:translateY(-5.6px) rotate(-45deg)}

/* ---------- HERO（两栏式 · 与 bot 页统一） ---------- */
.hero{position:relative;overflow:hidden;padding:140px 0 70px;background:linear-gradient(180deg,#F4F5FD 0%,#FFFFFF 62%)}
.hero::before{content:"";position:absolute;inset:0;z-index:0;pointer-events:none;background:radial-gradient(42% 50% at 9% 5%,rgba(62,134,245,.14),transparent 60%),radial-gradient(40% 46% at 95% 0%,rgba(62,134,245,.10),transparent 62%)}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.06fr .94fr;gap:52px;align-items:center}
.tag-pill{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;color:var(--blue);background:var(--blue-l);border-radius:99px;padding:6px 14px}
.hero h1{font-size:clamp(34px,4.8vw,58px);font-weight:800;letter-spacing:-.03em;line-height:1.14;margin:22px 0 0}
.hero h1 em{font-style:normal;color:var(--blue)}
.hero .lead{color:var(--ink-2);font-size:15.5px;margin-top:20px;max-width:520px;line-height:1.8}
.hero-cta{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.hero-note{margin-top:26px;font-size:12.5px;color:var(--muted);display:flex;gap:22px;flex-wrap:wrap}
.hero-note span{display:inline-flex;align-items:center;gap:6px}
.hero-note i{width:6px;height:6px;border-radius:50%;background:var(--blue);display:block}

/* Hero 右侧：本地客户端窗口 */
.hero-stage{position:relative;z-index:1}
.hero-stage::before{content:"";position:absolute;z-index:-1;left:-12%;right:-12%;bottom:-16%;height:60%;background:radial-gradient(60% 120% at 50% 0%,rgba(62,134,245,.26),transparent 72%);filter:blur(28px)}
.hero-win{background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 30px 70px rgba(15,23,42,.16);overflow:hidden}
.hw-bar{display:flex;align-items:center;gap:10px;padding:13px 16px;background:linear-gradient(180deg,#FBFCFF,#F2F5FB);border-bottom:1px solid var(--line)}
.hw-dots{display:flex;gap:6px}
.hw-dots i{width:11px;height:11px;border-radius:50%}
.hw-dots i:nth-child(1){background:#FF5F57}
.hw-dots i:nth-child(2){background:#FEBC2E}
.hw-dots i:nth-child(3){background:#28C840}
.hw-app{font-size:13px;font-weight:700;color:var(--ink-2)}
.hw-on{margin-left:auto;display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:600;color:#1F8A5B;background:#E6F6EE;padding:4px 10px;border-radius:99px}
.hw-on i{width:6px;height:6px;border-radius:50%;background:#2F9E6B;display:block}
.hw-body{display:grid;grid-template-columns:1fr 1.15fr;min-height:252px}
.hw-side{padding:14px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:8px;background:var(--bg-soft)}
.hw-g{display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:12px;background:#fff;border:1px solid var(--line)}
.hw-av{width:30px;height:30px;border-radius:9px;background:var(--blue-l);color:var(--blue);font-size:13px;font-weight:700;display:grid;place-items:center;flex:0 0 auto}
.hw-gtxt{flex:1;min-width:0}
.hw-gtxt b{display:block;font-size:13px;font-weight:700;color:var(--ink);line-height:1.3}
.hw-gtxt small{font-size:11px;color:var(--muted)}
.hw-dot{width:8px;height:8px;border-radius:50%;background:#CBD5E1;margin-left:auto;flex:0 0 auto}
.hw-dot.on{background:#28C840}
.hw-dot.warn{background:#F5B544}
.hw-feed{padding:14px;display:flex;flex-direction:column;gap:8px}
.hw-line{display:flex;gap:10px;font-size:12px;padding:9px 11px;border-radius:11px;background:var(--bg-soft)}
.hw-line .hw-t{color:var(--muted);font-variant-numeric:tabular-nums;flex:0 0 auto}
.hw-line .hw-b{color:var(--ink-2)}
.hw-line .hw-b b{color:var(--blue);font-weight:700}
.hw-line.dim{background:transparent;padding-left:0;padding-right:0;color:var(--muted)}

/* ---------- 卡片（图片在上） ---------- */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  transition:transform .3s cubic-bezier(.2,.7,.2,1),box-shadow .3s,border-color .3s}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--blue),rgba(62,134,245,.18));opacity:0;transition:opacity .3s}
.card:hover::before{opacity:1}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.tag{display:inline-block;font-size:11.5px;color:var(--blue);background:var(--blue-l);border-radius:8px;padding:3px 10px;font-weight:600;letter-spacing:.03em}
.plan-note{text-align:center;margin-top:22px;font-size:12.5px;color:var(--muted);letter-spacing:.03em}
.card.active{border-color:var(--blue);box-shadow:0 18px 44px rgba(62,134,245,.16)}



/* ---------- 核心能力：简洁功能卡（无背景图） ---------- */
.fcard{position:relative;padding:26px 24px 24px;display:flex;flex-direction:column;align-items:flex-start;background:#fff}
.fcard::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--blue),rgba(62,134,245,.18));opacity:0;transition:opacity .3s}
.fcard:hover::before{opacity:1}
.fcard:hover{border-color:transparent;box-shadow:var(--shadow)}
.fc-ico{width:48px;height:48px;border-radius:14px;background:var(--blue-l);color:var(--blue);display:grid;place-items:center;margin-bottom:16px;transition:background .28s,color .28s,transform .28s cubic-bezier(.2,.7,.2,1)}
.fcard:hover .fc-ico{background:var(--blue);color:#fff;transform:translateY(-2px)}
.fc-ico svg{width:23px;height:23px}
.fcard h3{font-size:17.5px;font-weight:700;margin:11px 0 8px;letter-spacing:-.01em;transition:color .25s}
.fcard:hover h3{color:var(--blue)}
.fcard p{font-size:13.8px;color:var(--muted);line-height:1.78}

/* ---------- 会员套餐：浅色定价卡（与深色能力卡区分） ---------- */
.pcard{position:relative;background:#fff;border-color:var(--line);padding:0;display:flex;flex-direction:column}
.pcard:hover{border-color:transparent;box-shadow:var(--shadow)}
.pc-body{padding:26px 24px 24px;display:flex;flex-direction:column;height:100%}
.pc-name{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--blue)}
.pc-price{display:flex;align-items:baseline;gap:3px;margin:16px 0 6px}
.pc-price i{font-style:normal;font-size:16px;font-weight:600;color:var(--ink)}
.pc-price b{font-size:38px;font-weight:800;letter-spacing:-.03em;line-height:1;color:var(--ink)}
.pc-price em{font-style:normal;font-size:13px;color:var(--muted);margin-left:3px}
.pc-note{font-size:12.5px;color:var(--muted)}
.pc-feats{display:grid;gap:9px;margin:0 0 22px;padding-top:18px;border-top:1px solid var(--line)}
.pc-feats li{font-size:13.5px;color:var(--ink-2);display:flex;gap:9px;align-items:flex-start;line-height:1.5}
.pc-feats li::before{content:"✓";color:var(--blue);font-weight:700;flex:0 0 auto}
.pc-btn{margin-top:auto;display:block;text-align:center;font-size:14px;font-weight:600;padding:13px;border:1px solid var(--line);border-radius:12px;color:var(--ink-2);transition:background .22s,color .22s,border-color .22s}
.pcard:hover .pc-btn{background:var(--blue);color:#fff;border-color:var(--blue)}
.pcard.hot{background:linear-gradient(160deg,#3E86F5,#2E73E0);border-color:transparent;color:#fff;box-shadow:0 22px 52px rgba(62,134,245,.28)}
.pcard.hot .pc-name{color:rgba(255,255,255,.86)}
.pcard.hot .pc-price i,.pcard.hot .pc-price b{color:#fff}
.pcard.hot .pc-price em{color:rgba(255,255,255,.78)}
.pcard.hot .pc-note{color:rgba(255,255,255,.82)}
.pcard.hot .pc-feats{border-top-color:rgba(255,255,255,.26)}
.pcard.hot .pc-feats li{color:#fff}
.pcard.hot .pc-feats li::before{color:#fff}
.pcard.hot .pc-btn{background:#fff;color:#2E73E0;border-color:#fff;font-weight:700}
.pcard.hot:hover .pc-btn{background:#0F172A;color:#fff;border-color:#0F172A}
.pc-badge{position:absolute;top:14px;right:14px;font-size:11px;font-weight:700;letter-spacing:.08em;padding:3px 11px;border-radius:99px;background:rgba(255,255,255,.22);color:#fff;border:1px solid rgba(255,255,255,.4)}

/* ---------- 周期切换 ---------- */
.tabs{display:flex;gap:8px;justify-content:center;margin-bottom:32px;flex-wrap:wrap}
.tab{font-family:inherit;font-size:13.5px;font-weight:600;color:var(--muted);background:var(--bg-soft);border:1px solid transparent;border-radius:11px;padding:9px 18px;cursor:pointer;transition:.2s}
.tab:hover{color:var(--ink)}
.tab.on{background:var(--blue);color:#fff;box-shadow:0 10px 22px rgba(62,134,245,.26)}

/* ---------- Hero 核心指标 ---------- */
/* 核心指标条 */
.hero-stats{grid-column:1/-1;display:grid;grid-template-columns:repeat(4,1fr);background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:0 22px 55px rgba(15,23,42,.08);overflow:hidden}
.hstat{position:relative;padding:24px 26px 22px;border-right:1px solid var(--line);transition:.2s}
.hstat:last-child{border-right:0}
.hstat::before{content:"";position:absolute;left:26px;top:24px;width:20px;height:3px;border-radius:99px;background:linear-gradient(90deg,var(--blue),var(--blue-d))}
.hstat b{display:block;padding-top:16px;font-size:28px;font-weight:800;letter-spacing:-.02em;line-height:1;color:var(--ink);font-variant-numeric:tabular-nums}
.hstat span{display:block;margin-top:9px;font-size:12.5px;color:var(--muted)}

/* ---------- CTA ---------- */
.cta{border-radius:24px;padding:clamp(44px,6vw,68px) clamp(24px,5vw,56px);text-align:center;color:#fff;background:linear-gradient(135deg,#1F4FA8,#3E86F5 60%,#2E73E0)}
.cta h2{font-size:clamp(26px,3.6vw,40px);font-weight:800;letter-spacing:-.02em;line-height:1.25}
.cta p{color:rgba(255,255,255,.85);margin:14px auto 26px;max-width:540px;font-size:15px}
.cta .hero-cta{margin-top:0;justify-content:center}

/* ---------- 页脚 ---------- */
.foot{position:relative;padding:64px 0 34px;margin-top:clamp(56px,7vw,96px);background:linear-gradient(180deg,rgba(6,12,26,.88),rgba(6,12,26,.96)),#08152F}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.foot h4{font-size:13px;font-weight:700;margin-bottom:14px;color:#fff}
.foot li{margin-bottom:9px}
.foot a{font-size:13.5px;color:rgba(255,255,255,.62);transition:color .2s}
.foot a:hover{color:#8FB4FF}
.foot-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:800;color:#fff}
.foot-brand img{width:26px;height:26px;flex:0 0 auto;display:block}

.foot p.desc{color:rgba(255,255,255,.6);font-size:13.5px;margin-top:14px;max-width:32ch}
.disclaimer{margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);font-size:12px;color:rgba(255,255,255,.45);line-height:1.9;max-width:98ch}
.foot-bottom{margin-top:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:rgba(255,255,255,.5);font-size:12.5px}

/* ---------- 客服二维码弹窗 ---------- */
.modal{position:fixed;inset:0;z-index:120;display:none;align-items:center;justify-content:center;padding:20px}
.modal.show{display:flex}
.modal-mask{position:absolute;inset:0;background:rgba(6,12,26,.62);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}
.modal-card{position:relative;z-index:1;width:100%;max-width:340px;background:#fff;border-radius:20px;padding:30px 28px 26px;text-align:center;box-shadow:0 30px 80px rgba(6,12,26,.4);animation:modalIn .28s cubic-bezier(.2,.7,.2,1)}
@keyframes modalIn{from{opacity:0;transform:translateY(14px) scale(.98)}to{opacity:1;transform:none}}
.modal-close{position:absolute;top:8px;right:10px;width:34px;height:34px;border:0;background:none;color:var(--muted);font-size:24px;line-height:1;cursor:pointer;border-radius:9px;font-family:inherit}
.modal-close:hover{background:var(--bg-soft);color:var(--ink)}
.modal-title{font-size:19px;font-weight:700;letter-spacing:-.01em}
.modal-sub{font-size:13px;color:var(--muted);margin:6px 0 18px}
.modal-qr{width:210px;height:210px;object-fit:cover;border:1px solid var(--line);border-radius:14px;margin:0 auto}
.modal-tip{font-size:12.5px;color:var(--muted);margin:15px 0 18px;line-height:1.7}
.modal-btn{width:100%}

/* ---------- 回到顶部 ---------- */
.totop{position:fixed;right:24px;bottom:28px;width:46px;height:46px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--ink-2);display:grid;place-items:center;cursor:pointer;z-index:80;box-shadow:var(--shadow-sm);opacity:0;pointer-events:none;transition:.3s}
.totop.show{opacity:1;pointer-events:auto}
.totop:hover{color:var(--blue);border-color:var(--blue)}

/* ---------- 顶部滚动进度 ---------- */
.progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--blue);z-index:100;transition:width .1s linear}

/* ---------- 章节小标 ---------- */
.sec-kicker{display:inline-flex;align-items:center;font-size:11.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--blue);font-weight:700;margin-bottom:10px}
.sec-kicker::before{content:"";width:24px;height:2px;border-radius:2px;background:currentColor;margin-right:10px;opacity:.85}
.sec-title{margin-top:0}


.btn svg{transition:transform .25s cubic-bezier(.2,.7,.2,1)}
.btn:hover svg{transform:translateX(3px)}

/* ---------- 卡片交互增强 ---------- */
.card:hover{transform:translateY(-8px)}
.fcard:hover .fc-ico{box-shadow:0 12px 26px rgba(62,134,245,.3)}


/* ---------- 功能演示 ---------- */
.showcase{display:grid;grid-template-columns:1.06fr 1fr;gap:52px;align-items:center}
.sc-win{border-radius:18px;overflow:hidden;border:1px solid #23262B;background:#141618;box-shadow:var(--shadow)}
.sc-bar{display:flex;align-items:center;gap:7px;padding:11px 14px;background:#1B1E21;border-bottom:1px solid #23262B}
.sc-bar i{width:9px;height:9px;border-radius:50%;background:#3A3D42;display:block}
.sc-bar span{font-size:11px;color:#7C828A;margin-left:8px;letter-spacing:.06em}
.sc-body{display:grid;grid-template-columns:118px minmax(0,1fr)}
.sc-side{border-right:1px solid #23262B;padding:12px 0;background:#17191C}
.sc-side div{display:flex;align-items:center;gap:8px;padding:7px 13px;font-size:11.5px;color:#7C828A;border-left:2px solid transparent}
.sc-side div.on{color:#E9EDF3;background:rgba(255,255,255,.05);border-left-color:var(--blue)}
.sc-side svg{width:12px;height:12px;flex:0 0 auto}
.sc-main{padding:14px 16px}
.sc-row{display:flex;align-items:center;gap:11px;padding:9px 2px;border-bottom:1px solid #212428}
.sc-row:last-child{border-bottom:0}
.sc-row .nm{flex:1;font-size:12px;color:#E9EDF3}
.sc-row .sub{font-size:10px;color:#7C828A}
.sc-foot{display:flex;justify-content:space-between;padding:10px 16px;border-top:1px solid #23262B;font-size:10.5px;color:#7C828A}
.sc-state{font-size:10px;color:#7C828A;display:inline-flex;align-items:center;gap:5px;padding:2px 8px;border:1px solid #2A2E33;border-radius:99px;flex:0 0 auto}
.sc-state i{width:5px;height:5px;border-radius:50%;background:#5A6068;display:block}
.sc-state.on{color:#7EE2A8;border-color:rgba(62,208,122,.32)}
.sc-state.on i{background:#3FD07A}
.sc-dot{display:inline-block;width:5px;height:5px;background:#3FD07A;margin-right:6px;border-radius:50%}
.sc-list{display:grid;gap:12px;margin-top:6px}
.sc-item{display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:#fff;transition:border-color .25s,transform .25s,box-shadow .25s}
.sc-item:hover{border-color:var(--blue);transform:translateX(4px);box-shadow:var(--shadow-sm)}
.sc-item i{flex:0 0 auto;width:21px;height:21px;border-radius:50%;background:var(--blue-l);color:var(--blue);display:grid;place-items:center;font-style:normal;font-size:11px;font-weight:700;margin-top:2px}
.sc-item b{display:block;font-size:14.5px;font-weight:600}
.sc-item span{font-size:13px;color:var(--muted);line-height:1.7}

/* ---------- 使用流程 ---------- */
.steps3{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line)}
.step3{padding:34px 30px 30px;border-left:1px solid var(--line)}
.step3:first-child{border-left:0;padding-left:0}
.sico{width:44px;height:44px;border-radius:13px;background:var(--blue-l);color:var(--blue);display:grid;place-items:center;margin-bottom:18px;transition:background .25s,color .25s}
.step3{transition:background .3s}
.step3:hover{background:rgba(62,134,245,.035)}
.step3:hover .sico{background:var(--blue);color:#fff}
.step3 .no{font-size:12.5px;font-weight:800;letter-spacing:.18em;color:var(--blue)}
.step3 h3{font-size:19px;font-weight:700;margin:12px 0 8px;letter-spacing:-.01em}
.step3 p{font-size:14px;color:var(--muted);line-height:1.8;max-width:34ch}

/* ---------- FAQ ---------- */
.faq{max-width:880px;margin:0 auto;border-top:1px solid var(--line)}
.qa{border-bottom:1px solid var(--line)}
.qa-q{width:100%;display:flex;align-items:center;gap:20px;padding:22px 4px;background:none;border:0;font-family:inherit;font-size:16.5px;font-weight:600;text-align:left;color:var(--ink);cursor:pointer;transition:padding-left .25s,color .2s}
.qa-q:hover{padding-left:10px;color:var(--blue)}
.qa-q span{flex:1}
.qa-q i{font-style:normal;width:22px;height:22px;border-radius:50%;border:1px solid var(--line);display:grid;place-items:center;color:var(--blue);font-size:14px;flex:0 0 auto;transition:transform .3s,border-color .2s}
.qa.open .qa-q i{transform:rotate(45deg);border-color:var(--blue)}
.qa-a{max-height:0;overflow:hidden;transition:max-height .38s cubic-bezier(.2,.7,.2,1)}
.qa-a p{padding:0 56px 24px 4px;font-size:14.5px;color:var(--muted);line-height:1.9}
.qa.open{border-bottom-color:rgba(62,134,245,.45)}
.qa.open .qa-q{color:var(--blue)}

/* ---------- 进场 ---------- */
.rv{opacity:0;transform:translateY(18px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.rv.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .showcase{grid-template-columns:1fr;gap:36px}
  .steps3{grid-template-columns:1fr}
  .step3{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-bottom:30px}
  .step3:first-child{border-top:0;padding-top:24px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
}
@media (max-width:860px){
  .menu{position:absolute;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;padding:10px var(--pad) 20px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow);transform:translateY(-10px);opacity:0;pointer-events:none;transition:.25s}
  .menu.show{transform:none;opacity:1;pointer-events:auto}
  .menu a{color:var(--ink-2);padding:13px 0;border-bottom:1px solid var(--line)}
  .menu a:last-child{border-bottom:0}
  .menu a.active::after{display:none}
  .menu a.active{color:var(--blue)}
  .topbar.on .menu a{color:var(--ink-2)}
  .burger{display:block}
  .hero{padding:120px 0 64px}
}
@media (max-width:620px){
  .cards{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:1fr 1fr}
  .hw-body{grid-template-columns:1fr}
  .hero-cta .btn{width:100%}
}