@charset "utf-8";
/* ==========================================================================
   DroidDeck · Android Steam 运行环境落地页
   版式参考：横向设备预览 + 平台条 + 功能卡片 + 对比 + FAQ + 行动区
   配色：深海蓝 + 琥珀点缀 + 冷调雾白
   ========================================================================== */

:root{
  --bg:#F3F6FA;
  --bg-elev:#EAF0F8;
  --surface:#FFFFFF;
  --line:#E0E7F1;
  --line-2:#CFD9E8;
  --line-3:#A7B5C9;
  --text:#0D1A30;
  --text-muted:#4A5A74;
  --text-faint:#7B88A0;
  --brand:#2563EB;
  --brand-deep:#153C8F;
  --brand-soft:#5B8CFF;
  --brand-tint:#E6EEFF;
  --accent:#C98412;
  --accent-tint:#FBF0DA;
  --grad:linear-gradient(135deg,#4F8CFF 0%,#2563EB 52%,#153C8F 100%);
  --rail:linear-gradient(90deg,#2563EB 0%,#C98412 50%,#2563EB 100%);
  --rail-v:linear-gradient(180deg,#2563EB 0%,#C98412 100%);
  --shadow:0 18px 40px -26px rgba(13,26,48,.30);
  --shadow-lg:0 30px 70px -34px rgba(13,26,48,.42);
  --header-bg:rgba(243,246,250,.9);
  --footer-bg:rgba(255,255,255,.58);
  --glow:rgba(37,99,235,.24);
  --r-sm:8px;
  --r:14px;
  --r-lg:20px;
  --pill:999px;
  --grid:rgba(37,99,235,.05);
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong","SimSun",Georgia,serif;
  color-scheme:light;
}

[data-theme="dark"]{
  --bg:#070D1A;
  --bg-elev:#0D1628;
  --surface:#111C33;
  --line:#1C2A45;
  --line-2:#293A5B;
  --line-3:#3D5175;
  --text:#E8EFFF;
  --text-muted:#A5B4CF;
  --text-faint:#7C8CAA;
  --brand:#76A5FF;
  --brand-deep:#C0D3FF;
  --brand-soft:#8FB7FF;
  --brand-tint:rgba(91,140,255,.14);
  --accent:#E8B25B;
  --accent-tint:rgba(232,178,91,.14);
  --grad:linear-gradient(135deg,#7EA9FF 0%,#3D76F0 52%,#2552B8 100%);
  --rail:linear-gradient(90deg,#3D76F0 0%,#E8B25B 50%,#3D76F0 100%);
  --rail-v:linear-gradient(180deg,#76A5FF 0%,#E8B25B 100%);
  --shadow:0 18px 40px -26px rgba(0,0,0,.85);
  --shadow-lg:0 30px 70px -34px rgba(0,0,0,.9);
  --header-bg:rgba(7,13,26,.9);
  --footer-bg:rgba(255,255,255,.03);
  --glow:rgba(91,140,255,.32);
  --grid:rgba(118,165,255,.07);
  color-scheme:dark;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:
    radial-gradient(ellipse 74% 44% at 100% 0%, rgba(37,99,235,.09), transparent 58%),
    radial-gradient(ellipse 58% 40% at 0% 100%, rgba(201,132,18,.07), transparent 55%),
    var(--bg);
  color:var(--text);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none;}
h1,h2,h3,p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 24px;position:relative;z-index:1;}
.section{padding:72px 0;position:relative;z-index:1;border-top:1px solid var(--line);}
.section::before{content:"";position:absolute;top:-1px;left:0;right:0;height:2px;background:var(--rail);opacity:.55;}
.section.pb-0{padding-bottom:0;}
.section.pt-0{padding-top:0;}
.section.pt-0::before{opacity:.28;}
section[id],div[id]{scroll-margin-top:106px;}
#top{scroll-margin-top:0;}
.section-head{max-width:780px;margin:0 0 42px;padding-left:16px;border-left:3px solid transparent;border-image:var(--rail-v) 1;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  margin-bottom:14px;padding:5px 13px;
  font-size:12px;font-weight:700;letter-spacing:.12em;
  color:var(--brand);background:var(--surface);
  border:1px solid var(--line-2);border-left:3px solid var(--brand);
  border-radius:var(--r-sm);
}
.section-title{font-family:var(--font-serif);font-size:clamp(25px,3.1vw,34px);font-weight:700;line-height:1.3;}
.section-sub{margin-top:12px;color:var(--text-muted);font-size:16px;}
.grad-text{
  background:linear-gradient(120deg,var(--brand-deep) 0%,var(--brand) 48%,var(--accent) 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  min-height:50px;padding:0 1.9rem;font-size:15.5px;font-weight:700;
  border-radius:var(--r);border:1px solid transparent;white-space:nowrap;
  transition:transform .18s ease,box-shadow .18s ease,background-color .2s ease,border-color .2s ease,color .2s ease;
}
.btn svg{width:18px;height:18px;flex:none;}
.btn-primary{
  color:#fff;background-image:var(--grad);
  box-shadow:0 14px 30px -18px rgba(21,60,143,.78),inset 0 1px 0 rgba(255,255,255,.24);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 38px -18px rgba(21,60,143,.9),inset 0 1px 0 rgba(255,255,255,.3);}
.btn-sm{min-height:42px;padding:0 1.2rem;font-size:14px;border-radius:var(--r-sm);}

.header{
  position:sticky;top:0;z-index:40;background:var(--header-bg);
  backdrop-filter:blur(14px);border-bottom:1px solid var(--line-2);
  transition:box-shadow .25s ease;
}
.header::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--rail);opacity:.85;pointer-events:none;}
.header.is-scrolled{box-shadow:0 12px 30px -26px rgba(13,26,48,.85);}
.header .nav{display:flex;align-items:center;gap:16px;height:88px;max-width:1180px;margin:0 auto;padding:0 24px;position:relative;}
.logo{display:flex;align-items:center;gap:10px;font-family:var(--font-serif);font-size:21px;font-weight:700;}
.logo-img{width:60px;height:60px;flex:none;overflow:hidden;display:grid;place-items:center;background:#fff;border:1px solid var(--line-2);border-radius:var(--r-sm);}
.logo-img img{width:100%;height:100%;object-fit:contain;}
.nav-links{margin-left:auto;display:flex;align-items:center;gap:26px;}
.nav-links a{font-size:14.5px;font-weight:600;color:var(--text-muted);transition:color .2s ease;}
.nav-links a:hover{color:var(--brand);}
.nav-cta{display:flex;align-items:center;gap:12px;}
.nav-cta .btn-primary{min-height:42px;padding:0 1.15rem;font-size:13.5px;}
.theme-toggle{
  width:42px;height:42px;flex:none;display:grid;place-items:center;padding:0;
  color:var(--text);background:var(--surface);border:1px solid var(--line-3);
  border-radius:var(--r-sm);transition:border-color .2s ease,color .2s ease,box-shadow .2s ease;
}
.theme-toggle:hover{border-color:var(--brand);color:var(--brand);box-shadow:0 0 16px var(--glow);}
.theme-toggle svg{width:19px;height:19px;display:block;}
.theme-toggle .icon-moon{display:none;}
[data-theme="dark"] .theme-toggle .icon-sun{display:none;}
[data-theme="dark"] .theme-toggle .icon-moon{display:block;}
.nav-toggle{
  display:none;width:42px;height:42px;flex:none;align-items:center;justify-content:center;
  color:var(--text);background:var(--surface);border:1px solid var(--line-3);border-radius:var(--r-sm);
}
.nav-toggle svg{width:20px;height:20px;}
.mobile-menu{
  display:none;position:absolute;left:0;right:0;top:calc(100% + 10px);
  padding:14px;background:var(--surface);border:1px solid var(--line-2);
  border-radius:var(--r);box-shadow:var(--shadow-lg);
}
.mobile-menu.is-open{display:block;}
.mobile-menu a{display:block;padding:11px 12px;font-size:15px;font-weight:600;color:var(--text-muted);border-radius:var(--r-sm);}
.mobile-menu a:hover{background:var(--brand-tint);color:var(--brand);}

.hero{position:relative;padding:62px 0 58px;overflow:hidden;}
.hero::before{
  content:"";position:absolute;inset:-20% -10% auto -10%;height:520px;pointer-events:none;
  background:radial-gradient(ellipse 46% 60% at 78% 24%, var(--glow), transparent 62%);opacity:.6;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;z-index:0;
  background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
  background-size:52px 52px;
  -webkit-mask-image:radial-gradient(ellipse 76% 66% at 52% 26%,#000,transparent 74%);
  mask-image:radial-gradient(ellipse 76% 66% at 52% 26%,#000,transparent 74%);
}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:48px;align-items:center;}
.hero-title{font-family:var(--font-serif);font-size:clamp(29px,4.2vw,48px);font-weight:700;line-height:1.22;letter-spacing:.01em;}
.hero-sub{margin-top:20px;max-width:640px;font-size:16.5px;color:var(--text-muted);}
.hero-slogan{display:inline-flex;align-items:center;gap:9px;margin-top:18px;font-size:13.5px;color:var(--text-faint);}
.hero-slogan::before{content:"";width:22px;height:1px;flex:none;background:var(--brand);opacity:.7;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.hero-tags li{
  padding:5px 14px;font-size:13.5px;font-weight:600;color:var(--brand);
  background:var(--brand-tint);border:1px solid rgba(37,99,235,.22);border-radius:var(--pill);
}
.hero-devices{position:relative;display:flex;justify-content:center;align-items:center;}
.hero-devices::before{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:560px;height:400px;border-radius:50%;background:radial-gradient(circle,var(--glow),transparent 68%);opacity:.75;
}
.device-group{position:relative;display:flex;flex-direction:column;align-items:center;width:100%;}
.device-frame{
  position:relative;width:100%;max-width:620px;padding:16px 16px 24px;
  background:linear-gradient(165deg,#1E2A3C 0%,#0C1422 62%,#0A111C 100%);
  border:1px solid rgba(255,255,255,.08);border-radius:20px;
  box-shadow:var(--shadow-lg),inset 0 1px 0 rgba(255,255,255,.06);
}
.device-frame::before{content:"";position:absolute;left:50%;bottom:10px;transform:translateX(-50%);width:46px;height:4px;border-radius:var(--pill);background:rgba(255,255,255,.22);}
.slide-stack{position:relative;overflow:hidden;border-radius:12px;background:#050A12;aspect-ratio:16 / 9;border:1px solid rgba(255,255,255,.06);}
.slide-stack::after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(115deg,rgba(255,255,255,.09) 0%,transparent 40%);}
.phone-slide{position:absolute;inset:0;opacity:0;transition:opacity .7s ease;}
.phone-slide.is-active{opacity:1;}
.phone-slide img{width:100%;height:100%;object-fit:cover;object-position:center;}
.carousel-dots{display:flex;gap:8px;margin-top:22px;}
.dot-bar{width:34px;height:5px;border-radius:var(--pill);background:var(--line-3);cursor:pointer;transition:background-color .25s ease,width .25s ease;}
.dot-bar.is-active{background:var(--brand);width:52px;}

/* ===== 平台支持 ===== */
.platform-bar{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--surface);border:1px solid var(--line-2);
  border-radius:var(--r-lg);overflow:hidden;
}
.platform-item{padding:24px 18px;text-align:center;border-right:1px solid var(--line);}
.platform-item:last-child{border-right:0;}
.p-name{font-family:var(--font-serif);font-size:17px;font-weight:700;}
.p-desc{margin-top:6px;font-size:13.5px;color:var(--text-faint);}

/* ===== 核心功能 ===== */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.card{
  position:relative;padding:30px 26px 26px;overflow:hidden;
  background:var(--surface);border:1px solid var(--line-2);border-radius:var(--r);
  box-shadow:var(--shadow);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.card:hover{transform:translateY(-4px);border-color:var(--line-3);box-shadow:var(--shadow-lg);}
.feature-num{position:absolute;top:18px;right:22px;font-family:var(--font-serif);font-size:30px;line-height:1;color:var(--brand);opacity:.16;}
.feature-icon{
  width:46px;height:46px;display:grid;place-items:center;
  color:var(--brand);background:var(--brand-tint);
  border:1px solid rgba(37,99,235,.22);border-radius:var(--r-sm);
}
.feature-icon svg{width:22px;height:22px;}
.feature-title{margin-top:16px;font-size:18px;font-weight:700;}
.feature-desc{margin-top:9px;font-size:15px;color:var(--text-muted);}
.feature-line{margin-top:20px;height:2px;background:var(--rail);opacity:.3;transition:opacity .25s ease;}
.card:hover .feature-line{opacity:1;}

/* ===== 优势亮点 ===== */
.edge-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.edge-col{
  position:relative;padding:30px 28px;
  background:var(--surface);border:1px solid var(--line-2);
  border-radius:var(--r);box-shadow:var(--shadow);
}
.edge-col::after{content:"";position:absolute;top:0;left:0;right:0;height:3px;border-radius:var(--r) var(--r) 0 0;}
.edge-col--before::after{background:var(--line-3);}
.edge-col--after::after{background:var(--rail);}
.edge-col h3{font-family:var(--font-serif);font-size:19px;font-weight:700;}
.edge-col ul{margin-top:20px;display:grid;gap:15px;}
.edge-col li{position:relative;padding-left:24px;font-size:15px;color:var(--text-muted);}
.edge-col li::before{content:"";position:absolute;left:2px;top:.62em;width:8px;height:8px;border-radius:50%;background:var(--line-3);}
.edge-col--after li{color:var(--text);}
.edge-col--after li::before{background:var(--brand);box-shadow:0 0 0 3px var(--brand-tint);}
.edge-notes{margin-top:22px;display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
.edge-note{padding:18px 16px;text-align:center;background:var(--bg-elev);border:1px solid var(--line-2);border-radius:var(--r-sm);}
.edge-note b{display:block;font-family:var(--font-serif);font-size:16px;font-weight:700;color:var(--brand);}
.edge-note span{display:block;margin-top:6px;font-size:13.5px;color:var(--text-faint);}
.edge-link{margin-top:22px;text-align:center;font-size:14px;color:var(--text-faint);}
.edge-link a{color:var(--brand);font-weight:700;}

/* ===== 常见问题 ===== */
.faq-layout{display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr);gap:48px;align-items:start;}
.faq-aside .section-head{margin-bottom:0;max-width:360px;}
.faq-aside-note{margin-top:22px;font-size:14px;color:var(--text-faint);}
.faq-aside-note a{color:var(--brand);font-weight:700;}
.faq{display:grid;gap:14px;}
.faq-item{
  background:var(--surface);border:1px solid var(--line-2);border-radius:var(--r);
  overflow:hidden;transition:border-color .25s ease,box-shadow .25s ease;
}
.faq-item.is-open{border-color:var(--line-3);box-shadow:var(--shadow);}
.faq-q{
  width:100%;display:flex;align-items:center;gap:14px;
  padding:18px 22px;text-align:left;
  font-family:var(--font-serif);font-size:16.5px;font-weight:700;color:var(--text);
}
.faq-q .icon{position:relative;width:20px;height:20px;flex:none;margin-left:auto;}
.faq-q .icon::before,.faq-q .icon::after{
  content:"";position:absolute;background:var(--brand);border-radius:2px;
  transition:transform .28s ease,opacity .28s ease;
}
.faq-q .icon::before{left:0;top:9px;width:20px;height:2px;}
.faq-q .icon::after{left:9px;top:0;width:2px;height:20px;}
.faq-item.is-open .faq-q .icon::after{transform:scaleY(0);opacity:0;}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s ease;}
.faq-item.is-open .faq-a{grid-template-rows:1fr;}
.faq-a-inner{overflow:hidden;}
.faq-a p{padding:0 22px 20px;font-size:15px;color:var(--text-muted);}
.faq-a a{color:var(--brand);font-weight:700;}

/* ===== 关于 ===== */
.about{
  position:relative;padding:34px 32px 32px;
  background:var(--surface);border:1px solid var(--line-2);
  border-radius:var(--r);box-shadow:var(--shadow);
}
.about::after{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--rail);border-radius:var(--r) var(--r) 0 0;}
.about h2{font-family:var(--font-serif);font-size:clamp(22px,2.6vw,28px);font-weight:700;}
.about-grid{margin-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.about-grid p{font-size:15.5px;color:var(--text-muted);}
.about-grid a{color:var(--brand);font-weight:700;}

/* ===== 行动区 ===== */
.cta-band{
  position:relative;overflow:hidden;text-align:center;padding:56px 32px;
  background-image:var(--grad);color:#fff;border-radius:var(--r-lg);
  box-shadow:0 34px 70px -40px rgba(21,60,143,.9);
}
.cta-band::after{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(circle at 18% 0%, rgba(255,255,255,.22), transparent 55%);}
.cta-band h2{position:relative;font-family:var(--font-serif);font-size:clamp(23px,3vw,32px);font-weight:700;}
.cta-band p{position:relative;margin-top:12px;font-size:16px;color:rgba(255,255,255,.9);}
.cta-actions{position:relative;display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:26px;}
.cta-band .btn-primary{background:#fff;background-image:none;color:var(--brand-deep);box-shadow:0 16px 34px -20px rgba(0,0,0,.6);}
.cta-note{font-size:13.5px;color:rgba(255,255,255,.8);}

/* ===== 页脚 ===== */
.footer{margin-top:64px;padding:52px 0 30px;border-top:1px solid var(--line-2);background:var(--footer-bg);}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:32px;}
.footer-brand .logo{margin-bottom:6px;}
.footer-brand p{margin-top:12px;max-width:360px;font-size:14.5px;color:var(--text-muted);}
.footer-nav h3{font-size:14.5px;font-weight:700;letter-spacing:.04em;}
.footer-links{margin-top:14px;display:grid;gap:10px;}
.footer-links.cols-2{grid-template-columns:1fr 1fr;gap:10px 18px;}
.footer-links a{font-size:14px;color:var(--text-muted);transition:color .2s ease;}
.footer-links a:hover{color:var(--brand);}
.footer-bottom{
  margin-top:34px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:10px 26px;justify-content:space-between;
  font-size:13.5px;color:var(--text-faint);
}
.footer-bottom a:hover{color:var(--brand);}

/* ===== 下载弹窗 ===== */
.modal{position:fixed;inset:0;z-index:200;display:none;align-items:center;justify-content:center;padding:24px;}
.modal.is-open{display:flex;}
.modal-overlay{position:absolute;inset:0;background:rgba(9,18,34,.56);backdrop-filter:blur(4px);}
.modal-box{
  position:relative;width:100%;max-width:540px;max-height:88vh;overflow:auto;
  padding:32px 30px 28px;background:var(--surface);border:1px solid var(--line-2);
  border-radius:var(--r-lg);box-shadow:var(--shadow-lg);animation:modalIn .26s ease;
}
.modal-box::after{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--rail);border-radius:var(--r-lg) var(--r-lg) 0 0;}
@keyframes modalIn{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:none;}}
.modal-box h3{font-family:var(--font-serif);font-size:22px;font-weight:700;}
.modal-sub{margin-top:9px;font-size:14.5px;color:var(--text-muted);}
.modal-close{
  position:absolute;top:15px;right:15px;width:34px;height:34px;
  display:grid;place-items:center;font-size:18px;color:var(--text-muted);
  background:var(--bg-elev);border:1px solid var(--line-2);border-radius:var(--r-sm);
  transition:color .2s ease,border-color .2s ease;
}
.modal-close:hover{color:var(--brand);border-color:var(--brand);}
.platform-list{display:grid;gap:10px;margin-top:22px;}
.platform{
  display:flex;align-items:center;gap:14px;padding:15px 17px;
  background:var(--bg-elev);border:1px solid var(--line-2);border-radius:var(--r-sm);
  transition:border-color .2s ease,background-color .2s ease,transform .2s ease;
}
.platform:hover{border-color:var(--brand);background:var(--surface);transform:translateX(3px);}
.p-icon{
  width:42px;height:42px;flex:none;display:grid;place-items:center;
  color:var(--brand);background:var(--brand-tint);
  border:1px solid rgba(37,99,235,.26);border-radius:var(--r-sm);
}
.p-icon svg{width:20px;height:20px;}
.platform b{display:block;font-size:15.5px;}
.platform small{font-size:13px;color:var(--text-faint);}
.p-arrow{margin-left:auto;color:var(--brand);font-size:18px;}
.modal-foot{margin-top:18px;font-size:13px;color:var(--text-faint);text-align:center;}

/* ===== 全站悬浮投诉入口（移动端齿轮图标 / 电脑端图标与文字） ===== */
.complaint-float{
  position:fixed;right:20px;bottom:22px;z-index:60;
  display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 14px;
  font-size:12.5px;font-weight:600;color:var(--brand);letter-spacing:.02em;
  background:var(--surface);border:1px solid var(--line-2);border-radius:var(--pill);
  box-shadow:0 10px 22px -18px rgba(13,26,48,.85);opacity:.9;
  transition:opacity .2s ease,border-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.complaint-float:hover{opacity:1;border-color:var(--brand);color:var(--brand-deep);transform:translateY(-2px);box-shadow:0 14px 26px -18px rgba(21,60,143,.6);}
.complaint-float .cf-icon{display:none;font-size:15px;line-height:1;}
.complaint-float .cf-mark{width:14px;height:14px;flex:none;display:block;opacity:.9;}
.complaint-float .cf-text{white-space:nowrap;}

/* ===== 动画与响应式 ===== */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease;}
.reveal.is-visible{opacity:1;transform:none;}

@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-sub{max-width:none;}
  .hero-devices{max-width:660px;margin:0 auto;width:100%;}
  .features{grid-template-columns:repeat(2,1fr);}
  .about-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
}
@media (max-width:880px){
  .nav-links,.nav-cta .btn-primary{display:none;}
  .nav-cta{margin-left:auto;}
  .nav-toggle{display:flex;}
  .header .nav{height:80px;}
  .logo-img{width:50px;height:50px;}
  .complaint-float{width:38px;height:38px;padding:0;justify-content:center;right:13px;bottom:15px;border-radius:50%;opacity:.85;}
  .complaint-float .cf-icon{display:block;}
  .complaint-float .cf-mark,.complaint-float .cf-text{display:none;}
  .section{padding:52px 0;}
  .hero{padding:40px 0 44px;}
  .section-head{margin-bottom:32px;}
  .edge-grid{grid-template-columns:1fr;}
  .faq-layout{grid-template-columns:1fr;gap:26px;}
  .faq-aside .section-head{max-width:none;}
  .cta-band{padding:42px 22px;}
}
@media (max-width:640px){
  .wrap{padding:0 18px;}
  .features{grid-template-columns:1fr;}
  .platform-bar{grid-template-columns:1fr 1fr;}
  .platform-item:nth-child(2){border-right:0;}
  .platform-item:nth-child(1),.platform-item:nth-child(2){border-bottom:1px solid var(--line);}
  .device-frame{padding:10px 10px 18px;border-radius:16px;}
  .device-frame::before{bottom:7px;width:34px;height:3px;}
  .card{padding:26px 20px 22px;}
  .about{padding:26px 20px 22px;}
  .faq-q{padding:16px 18px;font-size:16px;}
  .faq-a p{padding:0 18px 18px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:center;text-align:center;}
  .hero-actions .btn,.cta-actions .btn{width:100%;}
  .edge-col{padding:24px 20px;}
  .edge-notes{grid-template-columns:1fr 1fr;}
  .hero-title{font-size:clamp(27px,8.2vw,38px);overflow-wrap:anywhere;}
  .hero-sub{font-size:15.5px;line-height:1.75;}
  .hero-tags li{font-size:12.5px;line-height:1.5;}
  .modal{padding:14px;}
  .modal-box{padding:28px 20px 22px;}
  .platform{padding:13px 12px;gap:11px;}
  .platform small{line-height:1.45;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* ===== 投诉举报页 ===== */
.legal-section{border-top:0;padding-top:64px;}
.legal-list{display:grid;gap:14px;margin-top:24px;}
.legal-item{padding:18px 20px;background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--r-sm);}
.legal-item b{display:block;font-family:var(--font-serif);font-size:16px;}
.legal-item span{display:block;margin-top:5px;font-size:14px;color:var(--text-muted);}
.legal-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px;}
.btn-outline{color:var(--brand);background:var(--surface);border-color:var(--line-2);box-shadow:none;}
.btn-outline:hover{border-color:var(--brand);background:var(--brand-tint);transform:translateY(-2px);}
.legal-note{margin-top:18px;font-size:13.5px;color:var(--text-faint);}
@media (max-width:640px){
  .legal-section{padding-top:46px;}
  .legal-actions .btn{width:100%;}
}