/* ===== 1. 主题变量（浅色 + 金红点缀） ===== */
:root{
  --bg:#FCFBF9;
  --bg-elev:#F7F3EA;
  --surface:#FFFFFF;
  --line:#EDE7DB;
  --line-2:#E5DCCB;
  --line-3:#D8CCB5;
  --text:#1B1917;
  --text-muted:#6C6659;
  --text-faint:#948C7C;
  --gold:#C98A1B;
  --gold-deep:#A9710F;
  --gold-soft:#E8B44E;
  --red:#D0483A;
  --grad:linear-gradient(135deg,#E0A33A 0%,#C9821B 45%,#C8503A 100%);
  --rail:linear-gradient(90deg,#C98A1B 0%,#D0483A 50%,#C98A1B 100%);
  --rail-v:linear-gradient(180deg,#C98A1B 0%,#D0483A 100%);
  --slope:polygon(.75rem 0,100% 0,calc(100% - .75rem) 100%,0 100%);
  --slope-sm:polygon(.5rem 0,100% 0,calc(100% - .5rem) 100%,0 100%);
  --shadow:0 14px 34px -22px rgba(27,25,23,.38);
  --header-bg:rgba(252,251,249,.9);
  --footer-bg:rgba(255,255,255,.6);
  --text-grad:linear-gradient(120deg,#1B1917 10%,#A9710F 55%,#C8503A 95%);
  --glow:rgba(201,138,27,.35);
  color-scheme:light;
}

/* ===== 1b. 黑夜主题（金红点缀不变，底色转深） ===== */
[data-theme="dark"]{
  --bg:#0D1014;
  --bg-elev:#141920;
  --surface:#171D25;
  --line:#20262F;
  --line-2:#2A323C;
  --line-3:#3B4552;
  --text:#F1EDE6;
  --text-muted:#A7A196;
  --text-faint:#7B7568;
  --gold:#E2A63C;
  --gold-deep:#F0BE63;
  --gold-soft:#C98A1B;
  --red:#E0604F;
  --grad:linear-gradient(135deg,#E5B153 0%,#D9942A 45%,#D35743 100%);
  --rail:linear-gradient(90deg,#E2A63C 0%,#E0604F 50%,#E2A63C 100%);
  --rail-v:linear-gradient(180deg,#E2A63C 0%,#E0604F 100%);
  --shadow:0 14px 34px -22px rgba(0,0,0,.8);
  --header-bg:rgba(13,16,20,.88);
  --footer-bg:rgba(255,255,255,.03);
  --text-grad:linear-gradient(120deg,#F1EDE6 10%,#E5B153 55%,#E0604F 95%);
  --glow:rgba(226,166,60,.4);
  color-scheme:dark;
}

/* ===== 2. 基础重置 ===== */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(ellipse 80% 50% at 100% 0%, rgba(201,138,27,.09), transparent 55%),
    radial-gradient(ellipse 60% 40% at 0% 100%, rgba(208,72,58,.06), transparent 50%),
    var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
/* 极淡的横向纹理，增加质感（不抢内容） */
body::after{
  content:"";position:fixed;inset:0;pointer-events:none;z-index:0;opacity:.03;
  background:repeating-linear-gradient(0deg,transparent 0 2px,rgba(169,113,15,.5) 2px 3px);
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font:inherit;color:inherit;cursor:pointer;}
h1,h2,h3,h4,p{margin:0;}
ul{margin:0;padding:0;list-style:none;}

/* ===== 3. 通用布局 ===== */
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 24px;position:relative;z-index:1;}
/* 每个区块之间用线条分隔：1px 细分隔线 + 顶部 2px 渐变线 */
.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;
}
/* 锚点定位：留出固定头部高度，避免跳转后被顶部导航遮挡 */
section[id],main[id],div[id]{scroll-margin-top:92px;}
#top{scroll-margin-top:0;}
.section.pb-0{padding-bottom:0;}
.section.pt-0{padding-top:0;}
.section.pb-0::before,.section.pt-0::before{opacity:.35;}
/* 标题左对齐 + 左侧渐变竖条（与参考站一致） */
.section-head{
  max-width:760px;margin:0 0 40px;text-align:left;
  padding-left:16px;
  border-left:3px solid transparent;
  border-image:var(--rail-v) 1;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--gold-deep);font-weight:700;
  padding:5px 12px;
  background:var(--surface);
  border:1px solid var(--line-2);
  border-left:3px solid var(--gold);
  margin-bottom:16px;
}
.section-title{font-size:clamp(26px,3.2vw,36px);font-weight:800;letter-spacing:-.01em;line-height:1.25;color:var(--text);}
.section-sub{margin-top:12px;color:var(--text-muted);font-size:16px;}
.grad-text{
  background:linear-gradient(120deg,#A9710F 0%,#C9821B 40%,#C8503A 100%);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}

/* ===== 4. 按钮（斜切造型，与参考站一致） ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  min-height:50px;padding:0 2rem;
  border:1px solid transparent;border-radius:0;
  font-weight:700;letter-spacing:.06em;font-size:14px;
  clip-path:var(--slope);
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
  white-space:nowrap;
}
.btn-primary{
  background-image:var(--grad);
  color:#fff;
  border-color:rgba(169,113,15,.5);
  box-shadow:0 0 24px rgba(201,138,27,.28), inset 0 1px rgba(255,255,255,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 30px rgba(201,138,27,.45), 0 8px 20px -10px rgba(27,25,23,.4);}
.btn-ghost{
  background:var(--surface);
  color:var(--text);
  border-color:rgba(201,138,27,.45);
}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold-deep);transform:translateY(-2px);}
.btn-sm{min-height:40px;padding:0 1.25rem;font-size:12.5px;}
.btn svg{width:17px;height:17px;flex:none;}

/* ===== 5. 卡片：细描边 + 顶部渐变线 + 左侧竖条 ===== */
.card{
  position:relative;
  padding:30px 26px 26px;
  background:var(--surface);
  border:1px solid var(--line-2);
  box-shadow:var(--shadow);
  transition:transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.card::after{content:"";position:absolute;top:-1px;left:-1px;right:-1px;height:2px;background:var(--rail);opacity:.9;}
.card::before{content:"";position:absolute;left:-1px;top:0;bottom:0;width:3px;background:rgba(201,138,27,.35);transition:background .2s ease, box-shadow .2s ease;}
.card:hover{transform:translateY(-3px);border-color:rgba(201,138,27,.55);box-shadow:0 16px 36px -20px rgba(27,25,23,.4);}
.card:hover::before{background:var(--rail-v);box-shadow:0 0 22px rgba(201,138,27,.5);}

/* ===== 6. 顶部导航（白色条 + 底部细线） ===== */
.header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  background:var(--header-bg);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line-2);
  transition:box-shadow .25s ease;
}
.header.is-scrolled{box-shadow:0 10px 30px -22px rgba(27,25,23,.5);}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;}
.logo{display:flex;align-items:center;gap:11px;font-weight:800;font-size:18px;color:var(--text);}
.logo-img{
  width: 46px;
  height: 46px;
  flex:none;
  background:#FFD93D;
  border:1px solid var(--line-3);
}
.logo-img img{width:100%;height:100%;object-fit:contain;}
.nav-links{display:flex;align-items:center;gap:34px;}
.nav-links a{font-size:14.5px;color:var(--text-muted);font-weight:600;transition:color .2s ease;}
.nav-links a:hover{color:var(--gold-deep);}
.theme-toggle{
  width:38px;height:38px;flex:none;
  display:grid;place-items:center;padding:0;
  color:var(--text);
  background:var(--surface);
  border:1px solid var(--line-3);
  cursor:pointer;
  transition:border-color .2s ease,color .2s ease,box-shadow .2s ease;
}
.theme-toggle:hover{border-color:rgba(201,138,27,.6);color:var(--gold-deep);box-shadow:0 0 18px 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-cta{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:42px;height:42px;
  background:var(--surface);border:1px solid var(--line-2);
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);position:relative;}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

.mobile-menu{
  display:none;position:fixed;inset:72px 0 auto;z-index:49;
  background:var(--surface);
  border-bottom:1px solid var(--line-2);
  box-shadow:var(--shadow);
  padding:16px 24px 24px;
}
.mobile-menu.is-open{display:block;}
.mobile-menu a{display:block;padding:13px 0;font-size:15.5px;color:var(--text-muted);border-bottom:1px solid var(--line);}
.mobile-menu .btn{width:100%;margin-top:18px;}

/* ===== 7. Hero ===== */
.hero{position:relative;padding:132px 0 60px;overflow:hidden;}
/* 斜向渐变光带 */
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(115deg,transparent 38%,rgba(201,138,27,.05) 38%,rgba(208,72,58,.035) 100%);
}
.hero-grid{display:grid;grid-template-columns:1fr 1.05fr;gap:52px;align-items:center;position:relative;z-index:1;}
.hero h1{font-size:clamp(32px,4.6vw,56px);font-weight:800;line-height:1.15;letter-spacing:-.02em;color:var(--text);}
.hero h1 .grad-text{white-space:nowrap;}
.hero-sub{margin-top:20px;font-size:17px;color:var(--text-muted);max-width:520px;}
.hero-slogan{margin-top:20px;display:inline-flex;align-items:center;gap:12px;font-size:15.5px;font-weight:600;color:var(--gold-deep);}
.hero-slogan::before{content:"";width:28px;height:2px;background:var(--rail);}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:34px;}
.hero-tags li{
  font-size:13.5px;color:var(--text);
  padding:6px 14px;background:var(--surface);
  border:1px solid var(--line-2);
  border-left:2px solid var(--gold-soft);
}

/* 主视觉：竖立单机 + 光晕 + 轮播指示条（同参考站展示格式） */
.hero-devices{position:relative;padding:62px 0;display:flex;flex-direction:column;align-items:center;justify-content:center;}
.hero-devices::before{
  content:"";position:absolute;left:50%;top:46%;transform:translate(-50%,-50%);
  width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(201,138,27,.18),rgba(208,72,58,.07) 45%,transparent 70%);
  filter:blur(10px);
}
.phone{
  position:absolute;
  background:var(--surface);
  border:1px solid var(--line-3);
  border-radius:14px;
  padding:7px;
  box-shadow:0 22px 46px -22px rgba(27,25,23,.45);
}
.phone img{width:100%;height:auto;border-radius:9px;display:block;}
.device-frame{
  position:relative;z-index:2;
  width:342px;
  background:var(--surface);
  border:1px solid var(--line-3);
  border-radius:0;padding:28px;
  box-shadow:0 34px 66px -30px rgba(27,25,23,.5),0 0 0 1px rgba(201,138,27,.14);
}
.device-frame .slide-stack{
  position:relative;width:100%;
  aspect-ratio:387 / 689;
  overflow:hidden;border-radius:0;
  background:var(--bg-elev);
}
.phone-slide{position:absolute;inset:0;opacity:0;transition:opacity .9s ease;}
.phone-slide.is-active{opacity:1;}
.device-frame .phone-slide img{width:100%;height:100%;object-fit:cover;border-radius:0;display:block;}
.device-group{display:flex;flex-direction:column;align-items:center;}
.carousel-dots{margin-top:22px;display:flex;align-items:center;justify-content:center;gap:7px;}
.carousel-dots .dot-bar{
  width:24px;height:3px;border-radius:0;
  background:var(--line-3);cursor:pointer;
  transition:width .3s ease,background .3s ease;
}
.carousel-dots .dot-bar.is-active{width:40px;background-image:var(--rail);}

/* ===== 8. 平台支持条 ===== */
.platform-bar{
  display:grid;grid-template-columns:repeat(4,1fr);
  background:var(--surface);
  border:1px solid var(--line-2);
  box-shadow:var(--shadow);
}
.platform-item{padding:24px 20px;text-align:center;border-right:1px solid var(--line);}
.platform-item:last-child{border-right:none;}
.platform-item .p-name{font-size:16.5px;font-weight:800;color:var(--text);}
.platform-item .p-desc{margin-top:4px;font-size:13.5px;color:var(--text-faint);}

/* ===== 9. 核心功能 ===== */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.feature-num{
  position:absolute;top:8px;right:16px;
  font-size:2.5rem;font-weight:800;line-height:1;letter-spacing:-.04em;
  font-variant-numeric:tabular-nums;
  background:linear-gradient(180deg,rgba(169,113,15,.45),rgba(208,72,58,.18));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  pointer-events:none;user-select:none;
}
.feature-icon{
  width:46px;height:46px;margin:6px 0 18px;
  display:grid;place-items:center;
  color:var(--gold-deep);
  background:rgba(201,138,27,.09);
  border:1px solid rgba(201,138,27,.4);
  box-shadow:inset 0 1px rgba(255,255,255,.7);
}
.feature-icon svg{width:22px;height:22px;}
.feature-title{font-size:19.5px;font-weight:800;color:var(--text);}
.feature-desc{margin-top:10px;color:var(--text-muted);font-size:15px;}
.feature-line{margin-top:20px;height:1px;background:linear-gradient(90deg,rgba(201,138,27,.75),transparent);}

/* ===== 10. 界面预览 ===== */
.gallery{display:grid;grid-template-columns:repeat(5,1fr);gap:20px;align-items:end;}
.shot{margin:0;text-align:center;transition:transform .2s ease;}
.shot .phone{
  position:relative;width:100%;padding:6px;border-radius:12px;
  box-shadow:var(--shadow);border-radius:0;
  transition:border-color .2s ease, box-shadow .2s ease;
}
.shot .phone img{border-radius:0;}
.shot:hover{transform:translateY(-4px);}
.shot:hover .phone{border-color:rgba(201,138,27,.6);box-shadow:0 20px 40px -20px rgba(27,25,23,.5);}
.shot figcaption{margin-top:14px;font-size:14px;color:var(--text-muted);white-space:nowrap;}
.shot figcaption b{color:var(--text);font-weight:700;}

/* ===== 11. 常见问题 ===== */
.faq{display:grid;gap:12px;width:100%;}
.faq-item{
  position:relative;
  background:var(--bg-elev);
  border:1px solid var(--line-2);
  transition:border-color .2s ease, box-shadow .2s ease;
}
.faq-item::after{content:"";position:absolute;top:-1px;left:-1px;right:-1px;height:2px;background:var(--rail);opacity:.85;}
.faq-item::before{content:"";position:absolute;left:-1px;top:0;bottom:0;width:3px;background:rgba(201,138,27,.3);transition:background .2s ease, box-shadow .2s ease;}
.faq-item.is-open{border-color:rgba(201,138,27,.6);box-shadow:0 0 22px rgba(201,138,27,.18);}
.faq-item.is-open::before{background:var(--rail-v);box-shadow:0 0 20px rgba(201,138,27,.5);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px;background:none;border:none;text-align:left;
  font-size:16.5px;font-weight:700;color:var(--text);
  position:relative;z-index:1;
}
.faq-q .icon{
  position:relative;width:28px;height:28px;flex:none;
  background:var(--surface);
  border:1px solid rgba(201,138,27,.45);
  clip-path:var(--slope-sm);
}
.faq-q .icon::before,.faq-q .icon::after{
  content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  background:var(--gold-deep);transition:transform .22s ease,opacity .22s ease,background .22s ease;
}
.faq-q .icon::before{width:11px;height:2px;}
.faq-q .icon::after{width:2px;height:11px;}
.faq-item.is-open .faq-q .icon{background-image:var(--grad);border-color:rgba(169,113,15,.5);}
.faq-item.is-open .faq-q .icon::before,.faq-item.is-open .faq-q .icon::after{background:#fff;}
.faq-item.is-open .faq-q .icon::after{transform:translate(-50%,-50%) scaleY(0);opacity:0;}
.faq-a{
  display:grid;grid-template-rows:0fr;
  opacity:0;
  transition:grid-template-rows .34s ease, opacity .28s ease;
}
.faq-a-inner{overflow:hidden;min-height:0;}
.faq-item.is-open .faq-a{grid-template-rows:1fr;opacity:1;}
.faq-a p{
  color:var(--text-muted);font-size:15px;
  padding:14px 20px 18px;
  border-top:1px solid rgba(201,138,27,.28);
}

/* ===== 12. 关于 ===== */
.about{
  position:relative;
  padding:30px 28px;
  background:var(--bg-elev);
  border:1px solid var(--line-2);
  box-shadow:var(--shadow);
}
.about::after{content:"";position:absolute;top:-1px;left:-1px;right:-1px;height:2px;background:var(--rail);opacity:.85;}
.about::before{content:"";position:absolute;left:-1px;top:0;bottom:0;width:3px;background:var(--rail-v);opacity:.55;}
.about h2{font-size:21px;font-weight:800;color:var(--text);}
.about-grid{margin-top:12px;}
.about p{color:var(--text-muted);font-size:15px;line-height:1.9;}
.about p + p{margin-top:10px;}
@media (min-width:900px){
  .about-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 40px;}
  .about p + p{margin-top:0;}
}

/* ===== 13. 下载 CTA ===== */
.cta-band{
  position:relative;padding:50px 46px;text-align:center;
  background:linear-gradient(135deg,rgba(201,138,27,.08),var(--bg-elev) 45%,rgba(208,72,58,.06));
  border:1px solid var(--line-2);
  box-shadow:var(--shadow);
}
.cta-band::after{content:"";position:absolute;top:-1px;left:-1px;right:-1px;height:2px;background:var(--rail);opacity:.9;}
.cta-band h2{
  font-size:clamp(24px,3vw,34px);font-weight:800;letter-spacing:-.01em;
  background:var(--text-grad);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.cta-band p{margin-top:12px;color:var(--text-muted);font-size:16px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:26px;}
.cta-note{margin-top:16px;font-size:13px;color:var(--text-faint);}

/* ===== 14. 底部 ===== */
.footer{
  border-top:1px solid var(--line-2);
  margin-top:70px;padding:52px 0 32px;
  position:relative;z-index:1;
  background:var(--footer-bg);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:36px;}
.footer-brand p{margin-top:14px;color:var(--text-faint);font-size:14.5px;max-width:330px;}
.footer h3{margin:0 0 14px;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--text);font-weight:800;}
.footer-links{display:grid;gap:10px;}
.footer-links.cols-2{grid-template-columns:1fr 1fr;gap:10px 18px;}
.footer-links a,.footer-links span{color:var(--text-muted);font-size:14.5px;transition:color .2s ease;}
.footer-links a:hover{color:var(--gold-deep);}
.footer-bottom{
  margin-top:34px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;
  color:var(--text-faint);font-size:13.5px;
}
.footer-bottom a:hover{color:var(--gold-deep);}

/* ===== 15. 下载弹窗 ===== */
.modal{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:24px;}
.modal.is-open{display:flex;}
.modal-overlay{position:absolute;inset:0;background:rgba(27,25,23,.42);backdrop-filter:blur(4px);}
.modal-box{
  position:relative;width:100%;max-width:520px;
  padding:32px 30px 28px;
  background:var(--surface);
  border:1px solid var(--line-2);
  box-shadow:0 30px 70px -30px rgba(27,25,23,.6);
  animation:modalIn .24s ease;
}
.modal-box::after{content:"";position:absolute;top:-1px;left:-1px;right:-1px;height:2px;background:var(--rail);}
@keyframes modalIn{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:none;}}
.modal-box h3{font-size:21px;font-weight:800;}
.modal-sub{margin-top:8px;color:var(--text-muted);font-size:14.5px;}
.modal-close{
  position:absolute;top:14px;right:14px;width:34px;height:34px;
  background:var(--bg-elev);border:1px solid var(--line-2);
  display:grid;place-items:center;font-size:17px;color:var(--text-muted);
  transition:color .2s ease,border-color .2s ease;
}
.modal-close:hover{color:var(--gold-deep);border-color:var(--gold);}
.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);
  transition:border-color .2s ease,background .2s ease,transform .2s ease;
}
.platform:hover{border-color:rgba(201,138,27,.55);background:var(--surface);transform:translateX(3px);}
.platform .p-icon{
  width:40px;height:40px;flex:none;display:grid;place-items:center;
  color:var(--gold-deep);background:rgba(201,138,27,.1);
  border:1px solid rgba(201,138,27,.4);
}
.platform .p-icon svg{width:20px;height:20px;}
.platform b{display:block;font-size:15.5px;color:var(--text);}
.platform small{color:var(--text-faint);font-size:13px;}
.platform .p-arrow{margin-left:auto;color:var(--gold);font-size:17px;}
.modal-foot{margin-top:18px;font-size:13px;color:var(--text-faint);text-align:center;}

/* ===== 16. 滚动进场动画 ===== */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease;}
.reveal.is-visible{opacity:1;transform:none;}

/* ===== 17. 响应式 ===== */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-sub{max-width:none;}
  .hero-devices{max-width:620px;margin:0 auto;width:100%;}
  .features{grid-template-columns:1fr;gap:16px;}
  .platform-bar{grid-template-columns:repeat(2,1fr);}
  .platform-item:nth-child(2){border-right:none;}
  .platform-item:nth-child(1),.platform-item:nth-child(2){border-bottom:1px solid var(--line);}
  .gallery{grid-template-columns:repeat(3,1fr);gap:16px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:820px){
  .nav-links,.nav-cta .btn{display:none;}
  .nav-toggle{display:flex;}
  .section{padding:50px 0;}
  .hero{padding:108px 0 44px;}
  .section-head{margin-bottom:30px;}
  .hero-devices{height:auto;padding:10px 0 6px;}
  .hero-devices::before{width:360px;height:360px;}
  .device-frame{width:336px;}
  .cta-band{padding:40px 22px;}
  .faq-q{padding:16px 18px;font-size:16px;}
  .faq-a p{padding:12px 18px 16px;}
  .footer{margin-top:50px;padding:42px 0 28px;}
  .gallery{
    display:flex;gap:16px;overflow-x:auto;
    padding:4px 2px 16px;scroll-snap-type:x mandatory;
    -webkit-overflow-scrolling:touch;
  }
  .gallery .shot{flex:0 0 min(54%,210px);scroll-snap-align:center;}
  .gallery::-webkit-scrollbar{height:5px;}
  .gallery::-webkit-scrollbar-thumb{background:rgba(201,138,27,.45);}
}
@media (max-width:560px){
  .wrap{padding:0 18px;}
  .card{padding:24px 20px 22px;}
  .device-frame{width:300px;}
  .carousel-dots{margin-top:18px;}
  .platform-item{padding:20px 14px;}
  .gallery .shot{flex:0 0 min(60%,210px);}
  .shot figcaption{white-space:normal;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .cta-actions .btn{width:100%;}
  .about{padding:24px 20px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* ===== 18. 大屏：产品图放大 ===== */
@media (min-width:1081px){
  .gallery{gap:18px;}
  .shot .phone{padding:8px;}
  .device-frame{width:368px;}
  .hero-devices{align-items:flex-end;}
}

/* ===== 19. 移动端：界面预览图支持手动左右滑动 ===== */
.swipe-hint{display:none;margin-top:4px;text-align:center;font-size:12.5px;letter-spacing:.06em;color:var(--text-faint);}
@media (max-width:820px){
  .swipe-hint{display:block;}
}

/* ===== 20. 移动端：底部版权行固定两排 ===== */
@media (max-width:820px){
  .footer-bottom{
    flex-direction:column;
    align-items:flex-start;
    justify-content:flex-start;
    gap:8px;
    margin-top:26px;padding-top:18px;
  }
  .footer-bottom > span{display:block;width:100%;}
  .footer-bottom > span:first-child{order:2;}
  .footer-bottom > span:last-child{order:1;line-height:2;}
}