/* 爱思助手下载站 · site.css
   主题色：爱思品牌蓝 #1F7AF2 / 深蓝 #0B3EA8 / 橙 #FF8A3D */

:root{
  --brand:#1F7AF2;          /* 爱思品牌蓝 */
  --brand-dark:#0B3EA8;
  --brand-2:#63A5FF;        /* 亮蓝（渐变辅助） */
  --brand-3:#0A2455;        /* 深海军蓝（页脚/深色区） */
  --accent:#FF8A3D;         /* 品牌橙 */
  --accent-2:#FFB37A;
  --bg:#FBFCFF;
  --bg-soft:#F1F6FF;
  --bg-tint:#E3EDFF;
  --bg-hero1:#EFF5FF;
  --bg-hero2:#F8FAFF;
  --text:#17233F;
  --text-2:#3D4D6B;
  --text-3:#7585A3;
  --line:#DEE8F6;
  --line-2:#EAF0FA;
  --ok:#12B76A;
  --warn:#FF8A3D;
  --danger:#E5484D;
  --baidu:#0468D7;
  --quark:#6A5CFF;
  --shadow-sm:0 2px 8px rgba(15,40,90,.07);
  --shadow-md:0 8px 24px rgba(15,40,90,.12);
  --shadow-lg:0 20px 60px rgba(15,40,90,.20);
  --radius:14px;
  --radius-lg:20px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC","Segoe UI",system-ui,-apple-system,sans-serif;
  --font-num:"DIN Alternate","Roboto Mono","JetBrains Mono",ui-monospace,monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);color:var(--text);background:var(--bg);
  line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .15s ease}
a:hover{color:var(--brand)}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul,ol{list-style:none}

.wrap{max-width:1240px;margin:0 auto;padding:0 22px}
.sec{padding:84px 0}
.sec-tight{padding:52px 0}
.sec-soft{background:linear-gradient(180deg,#F4F8FF 0%,#FBFCFF 100%)}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:100;background:rgba(251,252,255,.86);
  backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line-2);
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;height:64px;max-width:1240px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.12rem;color:var(--text)}
.brand .logo{width:34px;height:34px;border-radius:9px;flex:0 0 34px;box-shadow:0 4px 10px rgba(31,122,242,.28)}
.brand .logo img{width:100%;height:100%;border-radius:inherit}
.brand .sub{font-size:.72rem;font-weight:600;color:var(--brand);background:var(--bg-tint);border-radius:6px;padding:1px 7px;margin-left:2px;letter-spacing:.05em}
.nav-main{display:flex;gap:2px;align-items:center}
.nav-main a{
  padding:8px 14px;border-radius:99px;font-size:.94rem;color:var(--text-2);font-weight:500;
  transition:all .2s ease;
}
.nav-main a:hover{color:var(--brand);background:var(--bg-tint)}
.nav-main a.is-active,.nav-main a.active{color:var(--brand);background:var(--bg-tint);font-weight:600}
.nav-toggle{display:none;padding:6px 8px;font-size:1.3rem;color:var(--text-2)}
.btn-cta{
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-2) 100%);
  color:#fff;padding:9px 20px;border-radius:10px;font-weight:700;font-size:.9rem;
  display:inline-flex;align-items:center;gap:8px;white-space:nowrap;
  box-shadow:0 6px 18px rgba(31,122,242,.32);
  transition:transform .18s ease,box-shadow .18s ease;
}
.btn-cta:hover{transform:translateY(-1px);box-shadow:0 10px 26px rgba(31,122,242,.42);color:#fff}
.btn-ghost{
  background:#fff;color:var(--text);border:1.5px solid var(--line);padding:10px 20px;border-radius:10px;
  font-weight:600;font-size:.9rem;display:inline-flex;align-items:center;gap:8px;white-space:nowrap;
  transition:all .18s ease;
}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}

/* ============ hero ============ */
.hero{
  padding:80px 0 72px;position:relative;overflow:hidden;
  background:
    radial-gradient(60% 50% at 15% 20%,rgba(99,165,255,.30) 0%,transparent 60%),
    radial-gradient(45% 40% at 90% 30%,rgba(31,122,242,.20) 0%,transparent 65%),
    linear-gradient(180deg,#EFF5FF 0%,#FBFCFF 100%);
}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:52px;align-items:center}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);
  padding:6px 14px;border-radius:99px;font-size:.82rem;color:var(--text-2);font-weight:500;
  margin-bottom:20px;box-shadow:var(--shadow-sm);
}
.hero-eyebrow .dot{width:8px;height:8px;border-radius:99px;background:var(--brand);box-shadow:0 0 0 4px rgba(31,122,242,.18)}
.hero h1{
  font-size:3.15rem;font-weight:900;line-height:1.16;letter-spacing:-.02em;color:var(--text);
  margin-bottom:20px;
}
.hero h1 .grad{
  background:linear-gradient(135deg,#1F7AF2 0%,#63A5FF 55%,#00AEE9 100%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.lead{font-size:1.1rem;color:var(--text-2);max-width:520px;margin-bottom:30px;line-height:1.85}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:18px}
.btn-quark{
  background:linear-gradient(135deg,#6A5CFF 0%,#8F7BFF 100%);color:#fff;padding:13px 26px;border-radius:11px;
  font-weight:700;font-size:.98rem;display:inline-flex;align-items:center;gap:9px;
  box-shadow:0 8px 22px rgba(106,92,255,.36);transition:transform .18s ease,box-shadow .18s ease;
}
.btn-quark:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(106,92,255,.45);color:#fff}
.btn-baidu{
  background:linear-gradient(135deg,#0468D7 0%,#2E86E8 100%);color:#fff;padding:13px 26px;border-radius:11px;
  font-weight:700;font-size:.98rem;display:inline-flex;align-items:center;gap:9px;
  box-shadow:0 8px 22px rgba(4,104,215,.34);transition:transform .18s ease,box-shadow .18s ease;
}
.btn-baidu:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(4,104,215,.44);color:#fff}
.hero-note{font-size:.83rem;color:var(--text-3);margin-bottom:34px}
.hero-note b{color:var(--text-2)}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;max-width:560px}
.hero-stats .st b{font-size:1.4rem;font-weight:800;color:var(--brand);font-family:var(--font-num);display:block;line-height:1.2}
.hero-stats .st span{font-size:.8rem;color:var(--text-3)}

.hero-art{position:relative}
.hero-art .art-frame{
  background:#fff;border-radius:20px;padding:16px;box-shadow:var(--shadow-lg);
  border:1px solid var(--line);position:relative;
}
.hero-art .art-frame img{border-radius:10px;width:100%}
.hero-art .art-cap{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:12px 6px 4px;font-size:.85rem;color:var(--text-3);
}
.hero-art .art-cap b{color:var(--text);font-size:.92rem}
.hero-art .qr-float{
  position:absolute;top:-26px;right:-16px;background:#fff;padding:10px;border-radius:14px;
  box-shadow:var(--shadow-md);border:2px solid var(--line);
  animation:qrPulseQuark 3.2s ease-in-out infinite;
}
.hero-art .qr-float img{width:92px;height:92px;border-radius:6px}
.hero-art .qr-float span{display:block;text-align:center;font-size:.68rem;color:var(--text-3);margin-top:6px}

/* ============ sections ============ */
.sec-head{text-align:center;max-width:780px;margin:0 auto 52px}
.sec-head .kicker{
  display:inline-block;background:var(--bg-tint);color:var(--brand);padding:.35em 1em;
  border-radius:99px;font-size:.78rem;font-weight:700;letter-spacing:.05em;margin-bottom:16px;
}
.sec-head h2{font-size:2.05rem;font-weight:800;line-height:1.25;margin-bottom:14px}
.sec-head p{color:var(--text-2);font-size:1.02rem}

/* card grids */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;
  transition:all .25s ease;position:relative;overflow:hidden;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#C9DEFF}
.card .card-ico{
  width:48px;height:48px;border-radius:12px;background:var(--bg-tint);color:var(--brand);
  display:flex;align-items:center;justify-content:center;font-size:1.35rem;margin-bottom:14px;
}
.card h3{font-size:1.12rem;font-weight:700;margin-bottom:8px}
.card p{color:var(--text-2);font-size:.93rem;line-height:1.7}

/* ============ 深色功能展示区 ============ */
.dark-sec{
  background:
    radial-gradient(55% 60% at 85% 15%,rgba(99,165,255,.14) 0%,transparent 60%),
    linear-gradient(160deg,#0A2455 0%,#081B40 55%,#0A1230 100%);
  color:#fff;overflow:hidden;
}
.dark-sec .sec-head .kicker{background:rgba(99,165,255,.16);color:#9CC4FF}
.dark-sec .sec-head h2{color:#fff}
.dark-sec .sec-head p{color:rgba(255,255,255,.72)}
.dark-sec .shot{
  border-radius:18px;overflow:hidden;border:1px solid rgba(255,255,255,.12);
  box-shadow:0 24px 60px rgba(2,10,40,.55);
}
.dark-sec .shot img{width:100%}
.showcase{display:grid;grid-template-columns:1fr 1.1fr;gap:44px;align-items:center;margin-bottom:64px}
.showcase:last-child{margin-bottom:0}
.showcase .sc-tag{
  display:inline-flex;align-items:center;gap:8px;background:rgba(99,165,255,.14);color:#9CC4FF;
  border:1px solid rgba(99,165,255,.3);padding:5px 14px;border-radius:99px;font-size:.8rem;font-weight:600;margin-bottom:18px;
}
.showcase h3{font-size:1.7rem;font-weight:800;margin-bottom:14px;color:#fff}
.showcase p{color:rgba(255,255,255,.75);font-size:.98rem;line-height:1.85;margin-bottom:18px}
.showcase ul{display:flex;flex-direction:column;gap:10px}
.showcase ul li{display:flex;gap:10px;align-items:flex-start;font-size:.92rem;color:rgba(255,255,255,.82);line-height:1.6}
.showcase ul li .fa{color:#5ED99B;margin-top:3px;flex:0 0 auto}
.showcase.reverse > .sc-text{order:2}
.showcase.reverse > .shot{order:1}
@media(max-width:920px){
  .showcase{grid-template-columns:1fr;gap:26px}
  .showcase.reverse > .sc-text{order:0}
  .showcase.reverse > .shot{order:0}
}

/* ============ 产品家族 ============ */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.prod-card{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px;
  display:flex;flex-direction:column;gap:12px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.prod-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#cfd8ec}
.prod-card .prod-thumb{
  border-radius:12px;background:linear-gradient(135deg,#eef4ff 0%,#f6f8fd 100%);
  display:flex;align-items:center;justify-content:center;overflow:hidden;padding:8px;
}
.prod-card .prod-thumb img{max-height:150px;object-fit:contain}
.prod-card h4{font-size:1.02rem;font-weight:700;margin:0}
.prod-card .prod-meta{color:var(--text-3);font-size:.8rem;font-family:var(--font-num)}
.prod-card p{color:var(--text-2);font-size:.86rem;line-height:1.6;margin:0;flex:1}
.prod-card .p-link{font-size:.85rem;color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:5px}
@media(max-width:900px){.prod-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.prod-grid{grid-template-columns:1fr}}

/* ============ 场景 ============ */
.scene-card{
  background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;
  transition:all .28s ease;display:flex;flex-direction:column;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#cfd8ec}
.scene-card .scene-visual{
  height:118px;background:linear-gradient(135deg,#eaf2ff 0%,#dbe7fb 100%);
  display:flex;align-items:center;justify-content:center;color:var(--brand);
  font-size:2.5rem;
}
.scene-card .scene-body{padding:20px;flex:1;display:flex;flex-direction:column;gap:8px}
.scene-card .scene-body h4{margin:0;font-size:1.06rem}
.scene-card .scene-body p{margin:0;color:var(--text-2);font-size:.88rem;line-height:1.65}

/* ============ 下载网盘大卡 ============ */
.pan-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.pan-card{
  background:#fff;border:1.5px solid var(--line);border-radius:20px;padding:28px;
  display:flex;flex-direction:column;align-items:center;text-align:center;gap:14px;
  transition:all .25s ease;
}
.pan-card:hover{box-shadow:var(--shadow-md);transform:translateY(-3px)}
.pan-card.quark{border-color:#D9D2FF}
.pan-card.baidu{border-color:#BAD4F2}
.pan-card .pan-name{display:flex;align-items:center;gap:9px;font-size:1.18rem;font-weight:800}
.pan-card.quark .pan-name{color:var(--quark)}
.pan-card.baidu .pan-name{color:var(--baidu)}
.pan-card .pan-desc{color:var(--text-2);font-size:.88rem;line-height:1.7;max-width:360px}
.pan-card .pan-tags{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.pan-card .pan-tags span{background:var(--bg-soft);border-radius:6px;padding:2px 9px;font-size:.75rem;color:var(--text-2)}
.pan-card .btn-quark,.pan-card .btn-baidu{margin-top:4px}
@media(max-width:820px){.pan-grid{grid-template-columns:1fr}}

/* ============ 三步教程 ============ */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.step{
  background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px 22px;position:relative;
}
.step .step-num{
  position:absolute;top:-14px;left:22px;background:var(--brand);color:#fff;
  width:32px;height:32px;border-radius:99px;display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:.9rem;box-shadow:0 6px 14px rgba(31,122,242,.35);
}
.step h4{margin:8px 0 8px;font-size:1.08rem}
.step p{color:var(--text-2);font-size:.9rem;margin:0}
@media(max-width:800px){.steps{grid-template-columns:1fr}}

/* ============ FAQ ============ */
.faq{max-width:860px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;overflow:hidden;
}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:17px 20px;cursor:pointer;font-weight:600;color:var(--text);user-select:none;
}
.faq-q .q-mark{color:var(--brand);font-weight:700;margin-right:8px}
.faq-q .caret{
  width:22px;height:22px;flex:0 0 22px;border-radius:6px;background:var(--bg-soft);color:var(--text-3);
  display:flex;align-items:center;justify-content:center;font-size:.7rem;transition:transform .25s ease;
}
.faq-item.open .faq-q .caret{transform:rotate(180deg);background:var(--brand);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;color:var(--text-2);font-size:.94rem;line-height:1.75}
.faq-item.open .faq-a{max-height:640px}
.faq-a-inner{padding:0 20px 20px 42px}

/* ============ 时效/安全提醒条 ============ */
.alert-strip{
  display:flex;align-items:center;gap:12px;background:linear-gradient(90deg,#fff6ec 0%,#fff 100%);
  border:1px solid #ffdfc0;border-radius:12px;padding:14px 18px;margin-bottom:24px;
}
.alert-strip .a-ico{color:var(--accent);font-size:1.3rem;font-weight:700;flex:0 0 auto}
.alert-strip .a-body{font-size:.9rem;color:var(--text-2);line-height:1.6}
.alert-strip .a-body b{color:var(--text)}
.alert-strip.soft{background:var(--bg-soft);border-color:var(--line)}
.alert-strip.soft .a-ico{color:var(--brand)}

/* ============ CTA ============ */
.cta-band{
  background:linear-gradient(135deg,#1F7AF2 0%,#0B3EA8 60%,#081F58 100%);
  border-radius:22px;padding:54px 44px;color:#fff;text-align:center;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;top:-100px;right:-100px;width:320px;height:320px;border-radius:99px;
  background:radial-gradient(closest-side,rgba(255,138,61,.35),transparent);filter:blur(20px);
}
.cta-band h2{font-size:1.9rem;color:#fff;margin-bottom:12px;position:relative}
.cta-band p{color:rgba(255,255,255,.85);max-width:620px;margin:0 auto 26px;font-size:1.02rem;position:relative}
.cta-band .cta-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;position:relative}

/* ============ 面包屑 ============ */
.breadcrumb{
  display:flex;align-items:center;gap:6px;font-size:.85rem;color:var(--text-3);padding:14px 0 20px;
}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .cur{color:var(--text-2);font-weight:500}

/* 页头 */
.page-hero{
  background:linear-gradient(180deg,#f5f9ff 0%,#fff 100%);padding:50px 0 38px;text-align:center;
  border-bottom:1px solid var(--line-2);
}
.page-hero .wrap{max-width:840px}
.page-hero h1{font-size:1.95rem;margin-bottom:12px}
.page-hero p{color:var(--text-2);font-size:1.02rem;margin:0 auto;max-width:660px}
.page-hero .kicker{
  display:inline-block;background:var(--bg-tint);color:var(--brand);padding:.3em .9em;
  border-radius:99px;font-size:.82rem;font-weight:600;margin-bottom:16px;
}

/* ============ 页脚 ============ */
.site-footer{
  background:#0A1C3F;color:#b7c4e2;padding:54px 0 26px;position:relative;
}
.site-footer .wrap{max-width:1200px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;margin-bottom:36px}
.footer-brand .fb-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .fb-logo{
  width:34px;height:34px;border-radius:8px;overflow:hidden;
  display:flex;align-items:center;justify-content:center;
}
.footer-brand .fb-logo img{width:100%;height:100%}
.footer-brand .fb-name{color:#fff;font-weight:700;font-size:1.05rem}
.footer-brand p{color:#8f9fca;font-size:.88rem;line-height:1.7;margin-bottom:12px}
.footer-brand .fb-note{color:#7382ab;font-size:.78rem;line-height:1.6}
.footer-col h5{color:#fff;font-size:.95rem;font-weight:600;margin-bottom:14px}
.footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.footer-col a{color:#a7b6da;font-size:.88rem}
.footer-col a:hover{color:#fff}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding-top:22px;display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;font-size:.78rem;color:#7382ab;line-height:1.7;
}
.footer-bottom .fb-tags{display:flex;gap:14px;flex-wrap:wrap}
.footer-bottom a{color:#8f9fca}
.footer-bottom a:hover{color:#fff}
@media(max-width:900px){.footer-grid{grid-template-columns:1fr 1fr;gap:24px}}
@media(max-width:560px){.footer-grid{grid-template-columns:1fr}}

/* ============ 表格 ============ */
.table-wrap{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{padding:13px 18px;text-align:left;border-bottom:1px solid var(--line-2)}
th{background:var(--bg-soft);font-weight:600;color:var(--text);font-size:.86rem;white-space:nowrap}
tbody tr:last-child td{border-bottom:none}
tbody tr:hover{background:#fafcff}
table .yes{color:var(--ok);font-weight:700}
table .no{color:var(--text-3)}
table .hi{color:var(--brand);font-weight:600}

/* ============ doc 布局（features/guide） ============ */
.doc{max-width:1160px;margin:0 auto;padding:34px 22px 10px}
.doc.single{display:block}
.doc-grid{display:grid;grid-template-columns:230px 1fr;gap:38px;align-items:start}
.doc-toc{
  position:sticky;top:88px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 16px;
  font-size:.9rem;
}
.doc-toc h5{font-size:.82rem;color:var(--text-3);letter-spacing:.06em;margin-bottom:10px;font-weight:600}
.doc-toc a{display:block;padding:6px 10px;border-radius:8px;color:var(--text-2);line-height:1.4}
.doc-toc a:hover,.doc-toc a.on{background:var(--bg-soft);color:var(--brand)}
.doc-body h2{font-size:1.5rem;margin:0 0 14px;padding-top:8px}
.doc-body h3{font-size:1.15rem;margin:26px 0 10px}
.doc-body p{color:var(--text-2);font-size:.95rem;line-height:1.85;margin-bottom:14px}
.doc-body ul{margin:0 0 16px;padding:0;display:flex;flex-direction:column;gap:8px}
.doc-body ul li{display:flex;gap:9px;align-items:flex-start;color:var(--text-2);font-size:.93rem;line-height:1.7}
.doc-body ul li .fa{color:var(--ok);margin-top:4px;flex:0 0 auto}
.doc-body .imgblock{
  background:linear-gradient(135deg,#0A2455 0%,#0A1230 100%);
  border-radius:14px;overflow:hidden;margin:16px 0 22px;border:1px solid var(--line);
}
.doc-body .imgblock img{width:100%}
@media(max-width:920px){.doc-grid{grid-template-columns:1fr}.doc-toc{position:static;display:none}}

/* ============ 二维码呼吸边框（柔和、不刺眼） ============ */
@keyframes qrPulse{
  0%{box-shadow:0 0 0 0 rgba(31,122,242,.42),0 8px 22px rgba(15,40,90,.14);transform:scale(1)}
  70%{box-shadow:0 0 0 14px rgba(31,122,242,0),0 8px 22px rgba(15,40,90,.14);transform:scale(1.02)}
  100%{box-shadow:0 0 0 0 rgba(31,122,242,0),0 8px 22px rgba(15,40,90,.14);transform:scale(1)}
}
@keyframes qrPulseOrange{
  0%{box-shadow:0 0 0 0 rgba(255,138,61,.45),0 8px 22px rgba(15,40,90,.14);transform:scale(1)}
  70%{box-shadow:0 0 0 14px rgba(255,138,61,0),0 8px 22px rgba(15,40,90,.14);transform:scale(1.02)}
  100%{box-shadow:0 0 0 0 rgba(255,138,61,0),0 8px 22px rgba(15,40,90,.14);transform:scale(1)}
}
@keyframes qrPulseQuark{
  0%{box-shadow:0 0 0 0 rgba(106,92,255,.42),0 8px 22px rgba(15,40,90,.14);transform:scale(1)}
  70%{box-shadow:0 0 0 14px rgba(106,92,255,0),0 8px 22px rgba(15,40,90,.14);transform:scale(1.02)}
  100%{box-shadow:0 0 0 0 rgba(106,92,255,0),0 8px 22px rgba(15,40,90,.14);transform:scale(1)}
}
@keyframes qrPulseBaidu{
  0%{box-shadow:0 0 0 0 rgba(4,104,215,.42),0 8px 22px rgba(15,40,90,.14);transform:scale(1)}
  70%{box-shadow:0 0 0 14px rgba(4,104,215,0),0 8px 22px rgba(15,40,90,.14);transform:scale(1.02)}
  100%{box-shadow:0 0 0 0 rgba(4,104,215,0),0 8px 22px rgba(15,40,90,.14);transform:scale(1)}
}
.qr-frame{
  background:#fff;padding:14px;border-radius:18px;border:2px solid #d9e3f6;
  display:inline-flex;flex-direction:column;align-items:center;gap:12px;
  animation:qrPulse 3.2s ease-in-out infinite;
}
.qr-frame .qr-img{width:150px;height:150px;border-radius:8px}
.qr-frame .qr-cap{font-size:.82rem;color:var(--text-2);font-weight:500;text-align:center;line-height:1.4;max-width:190px}
.qr-frame.quark{border-color:#D6D0FF;animation-name:qrPulseQuark}
.qr-frame.baidu{border-color:#B7D5F4;animation-name:qrPulseBaidu}
.qr-inline{display:inline-flex;flex-direction:column;align-items:center;gap:10px}
.qr-inline .qr-box{
  background:#fff;padding:10px;border-radius:12px;border:2px solid #d9e3f6;
  animation:qrPulse 3.2s ease-in-out infinite;
}
.qr-inline .qr-box.quark{border-color:#D6D0FF;animation-name:qrPulseQuark}
.qr-inline .qr-box.baidu{border-color:#B7D5F4;animation-name:qrPulseBaidu}
.qr-inline .qr-box img{width:112px;height:112px;border-radius:6px}
.qr-inline .qr-label{font-size:.8rem;color:var(--text-3)}

/* ============ 下载弹窗 ============ */
.modal{
  position:fixed;inset:0;z-index:200;display:none;align-items:center;justify-content:center;
  background:rgba(6,25,66,.55);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);padding:20px;
}
.modal.open{display:flex;animation:modalIn .25s ease}
@keyframes modalIn{from{opacity:0}to{opacity:1}}
.modal-panel{
  background:#fff;border-radius:20px;max-width:440px;width:100%;padding:32px 30px 26px;
  text-align:center;position:relative;box-shadow:0 30px 80px rgba(6,25,66,.35);
  animation:modalIn .3s ease;
}
.modal-close{
  position:absolute;top:12px;right:12px;width:34px;height:34px;border-radius:99px;border:1px solid var(--line);
  background:#fff;color:var(--text-3);cursor:pointer;font-size:1.05rem;line-height:1;display:flex;align-items:center;justify-content:center;
}
.modal-close:hover{background:var(--bg-soft);color:var(--text)}
.modal-panel h3{font-size:1.32rem;margin-bottom:8px}
.modal-panel .m-sub{color:var(--text-3);font-size:.92rem;margin-bottom:18px}
.modal-panel .qr-frame{margin-bottom:14px}
.modal-panel .m-note{
  background:var(--bg-soft);border-radius:12px;padding:12px 14px;font-size:.86rem;color:var(--text-2);
  margin-top:14px;text-align:left;line-height:1.65;
}
.modal-panel .m-note b{color:var(--text)}
.modal-panel .m-safe{
  margin-top:14px;display:flex;align-items:center;justify-content:center;gap:6px;font-size:.82rem;color:var(--ok);font-weight:600;
}
.modal-panel .m-version{font-family:var(--font-num);font-size:.78rem;color:var(--text-3);margin-top:8px}

/* 弹窗里的扫码步骤 */
.m-steps{list-style:none;margin:16px auto 0;padding:0;max-width:320px;text-align:left}
.m-steps li{display:flex;align-items:center;gap:10px;padding:7px 0;font-size:13.5px;color:var(--text-2);line-height:1.4}
.m-steps li + li{border-top:1px dashed var(--line)}
.m-steps li i{
  flex:0 0 auto;width:22px;height:22px;border-radius:99px;
  background:linear-gradient(135deg,#1F7AF2 0%,#0B3EA8 100%);
  color:#fff;font-style:normal;font-size:12px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
}

/* 弹窗提示里的网盘名高亮 */
.quark-mark{color:var(--quark)}
.baidu-mark{color:var(--baidu)}

/* toast（移动端跳转提示） */
.toast{
  position:fixed;left:50%;bottom:9vh;transform:translateX(-50%) translateY(20px);
  background:rgba(10,30,70,.92);color:#fff;padding:11px 22px;border-radius:99px;
  font-size:.88rem;z-index:300;opacity:0;pointer-events:none;transition:all .28s ease;white-space:nowrap;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ============ responsive ============ */
@media(max-width:960px){
  .nav-main{display:none}
  .nav-toggle{display:inline-flex}
  .nav-main.open{
    display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;
    background:#fff;padding:16px;gap:6px;border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-md);align-items:stretch;
  }
  .nav-main.open a{padding:12px 16px}
  .hero{padding:60px 0 56px}
  .hero h1{font-size:2.35rem}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .sec-head h2{font-size:1.6rem}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .pan-grid{grid-template-columns:1fr}
}
@media(max-width:600px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .sec{padding:54px 0}
  .hero h1{font-size:1.95rem}
  .modal-panel{padding:26px 20px 22px}
  .cta-band{padding:40px 22px}
  .cta-band h2{font-size:1.5rem}
  .hero-cta .btn-quark,.hero-cta .btn-baidu{width:100%;justify-content:center}
}

/* ============ 工具类 ============ */
.text-center{text-align:center}
.mt-1{margin-top:8px}
.mt-2{margin-top:16px}
.mt-3{margin-top:24px}
.mt-4{margin-top:36px}
.muted{color:var(--text-3)}
.small{font-size:.85rem}
.tag{display:inline-block;background:var(--bg-soft);border-radius:6px;padding:2px 8px;font-size:.78rem;color:var(--text-2)}
.tag.brand{background:var(--bg-tint);color:var(--brand)}
.tag.ok{background:#e6f7ee;color:#0a7a3d}
.tag.warn{background:#fff3e6;color:#a5570a}

/* 隐藏（保留位置） */
.hide{display:none!important}

/* 打印 */
@media print{
  .site-header,.site-footer,.modal,.alert-strip{display:none!important}
  body{background:#fff}
}