/* ============================================================
   wuming — 视觉基线 4.0
   暗夜沙盘 #0A0906 / 琥珀金橙 #FF7A1A→#FFC53D / 玻璃拟态 + 暖辉光
   ============================================================ */

:root{
  --bg:#0A0906;
  --bg-2:#0E0C07;
  --ink:#F2F5F8;
  --dim:#9BA3AD;
  --mute:#5C6470;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.16);
  --g1:#FF7A1A;
  --g2:#FFC53D;
  --accent:#FFC53D;
  --accent-deep:#E88420;
  --panel:rgba(255,255,255,.03);
  --grad:linear-gradient(115deg,#FF7A1A 0%,#FFA32B 55%,#FFC53D 100%);
  --mono:'Chakra Petch',ui-monospace,SFMono-Regular,monospace;
  --sans:'Noto Sans SC',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --r-card:16px;
  --r-pill:999px;
}

*,*::before,*::after{box-sizing:border-box}

html{
  scroll-behavior:smooth;
  -webkit-text-size-adjust:100%;
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
}

body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

/* 全局氛围光：两团极弱的蓝青极光，钉在视口上 */
body::before{
  content:'';position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(ellipse 55% 42% at 78% -6%,rgba(255,122,26,.11),transparent 68%),
    radial-gradient(ellipse 48% 38% at 12% 104%,rgba(255,197,61,.07),transparent 70%);
}
body > *{position:relative;z-index:1}

a{color:var(--ink);text-decoration:none;transition:color .3s}
a:hover{color:var(--accent)}

section[id]{scroll-margin-top:96px}

img,canvas{display:block;max-width:100%}

::selection{background:rgba(255,197,61,.3);color:#1A120A}

::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#070A0E}
::-webkit-scrollbar-thumb{background:#1B222C;border-radius:6px;border:2px solid #070A0E}
::-webkit-scrollbar-thumb:hover{background:#2A3542}

/* ── 载入遮罩 ─────────────────────────────────────────── */
.boot{
  position:fixed;inset:0;z-index:90;
  background:var(--bg);
  display:flex;flex-direction:column;justify-content:flex-end;
  padding:clamp(24px,5vw,64px);
  pointer-events:none;
  opacity:1;transition:opacity .7s ease;
}
.boot.off{opacity:0}
.boot-word{
  font-family:var(--mono);font-weight:700;
  font-size:clamp(40px,7vw,96px);line-height:1;letter-spacing:.02em;
  -webkit-text-stroke:0.022em #F5F2EA;
}
.boot-row{
  display:flex;justify-content:space-between;align-items:center;
  margin-top:16px;
  font-family:var(--mono);font-size:13px;letter-spacing:.2em;color:#61676F;
}
.boot-bar{height:1px;background:#1A2028;margin-top:14px;border-radius:1px;overflow:hidden}
.boot-bar i{display:block;height:1px;width:0;background:var(--grad);box-shadow:0 0 8px rgba(255,176,58,.8);transition:width .12s linear}

/* ── 顶栏 ─────────────────────────────────────────────── */
.hd{
  position:fixed;top:0;left:0;right:0;z-index:40;
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:clamp(13px,1.8vw,20px) clamp(20px,4vw,56px);
  background:rgba(5,7,11,.55);
  backdrop-filter:blur(18px) saturate(1.2);-webkit-backdrop-filter:blur(18px) saturate(1.2);
  border-bottom:1px solid transparent;
  transition:background .4s,border-color .4s;
}
.hd.solid{background:rgba(5,7,11,.86);border-bottom-color:var(--line)}

.hd-logo{display:flex;align-items:center;gap:11px}
.hd-mark{
  width:10px;height:10px;flex:0 0 auto;
  border-radius:3px;
  background:var(--grad);
  box-shadow:0 0 16px rgba(255,176,58,.95),0 0 34px rgba(255,122,26,.5);
}
.hd-name{
  font-family:var(--mono);font-weight:700;font-size:23px;letter-spacing:.03em;
  color:#fff;
  -webkit-text-stroke:0.022em #fff;
}

.hd-right{display:flex;align-items:center;gap:clamp(10px,1.6vw,20px);min-width:0}

.hd-nav{display:flex;align-items:center;gap:clamp(18px,2.6vw,40px)}
.hd-nav a{display:flex;flex-direction:column;gap:3px;color:#D9DDE2;position:relative}
.hd-nav a i{
  font-family:var(--mono);font-style:normal;font-size:11px;
  letter-spacing:.18em;color:#82888F;transition:color .35s;
}
.hd-nav a b{font-size:15px;font-weight:600;letter-spacing:.1em;transition:color .35s}
.hd-nav a::after{
  content:'';position:absolute;left:0;right:100%;bottom:-7px;height:1px;
  background:var(--grad);
  transition:right .45s cubic-bezier(.2,.8,.2,1);
}
.hd-nav a:hover{color:#fff}
.hd-nav a:hover i{color:var(--accent)}
.hd-nav a:hover::after,.hd-nav a.cur::after{right:0}
.hd-nav a.cur b{color:#fff}
.hd-nav a.cur i{color:var(--accent)}

/* 顶栏按钮：QQ群 / 试用码 */
.hd-qq{
  flex:0 0 auto;white-space:nowrap;
  display:flex;align-items:center;gap:8px;
  padding:9px 16px;min-height:42px;
  background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.14);
  border-radius:var(--r-pill);
  color:#fff;cursor:pointer;
  font-family:var(--sans);font-size:13.5px;font-weight:500;letter-spacing:.06em;
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  transition:border-color .35s,color .35s,background .35s,box-shadow .35s,transform .35s;
}
.hd-qq:hover{
  border-color:rgba(255,197,61,.5);
  color:var(--accent);
  background:rgba(255,197,61,.07);
  box-shadow:0 0 18px rgba(255,176,58,.18);
  transform:translateY(-1px);
}
.hd-qq.done{
  border-color:rgba(255,197,61,.8);
  color:var(--accent);
  background:rgba(255,197,61,.12);
  box-shadow:0 0 22px rgba(255,176,58,.3);
}

.hd-qq-ico{
  width:19px;height:22px;flex:0 0 auto;
  display:block;
  object-fit:contain;
  transition:transform .35s,opacity .35s;
}
.hd-qq:hover .hd-qq-ico{transform:scale(1.1)}
.hd-qq > span{color:#C9CFD6;font-size:13px;letter-spacing:.04em;transition:color .35s}
.hd-qq:hover > span{color:var(--accent)}
.hd-qq > b{
  font-family:var(--mono);font-weight:600;font-size:15.5px;letter-spacing:.04em;
}
#copyQQ{border-color:rgba(255,197,61,.35);background:rgba(255,197,61,.06)}
#copyQQ > b{color:#FFD67E;text-shadow:0 0 12px rgba(255,176,58,.4)}

.hd-code{border-color:rgba(255,255,255,.12)}
.hd-code > b{color:#EDEFF2;font-size:14.5px;letter-spacing:.03em}
.hd-code:hover > b{color:var(--accent)}

/* ── 首页 ─────────────────────────────────────────────── */
.hero{
  position:relative;
  min-height:100svh;
  display:flex;flex-direction:column;justify-content:center;align-items:center;
  padding:clamp(104px,13.5vh,136px) clamp(20px,4vw,56px) clamp(56px,8vh,88px);
  overflow:hidden;
}
.hero::before{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(ellipse 62% 46% at 50% 30%,rgba(255,122,26,.12),transparent 70%),
    radial-gradient(ellipse 40% 30% at 50% 44%,rgba(255,197,61,.06),transparent 72%),
    linear-gradient(180deg,rgba(5,7,11,0) 58%,rgba(5,7,11,.94) 100%);
}
/* 极细栅格底纹，营造「频谱面板」质感 */
.hero::after{
  content:'';position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.024) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.024) 1px,transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 40%,#000 30%,transparent 75%);
  mask-image:radial-gradient(ellipse 70% 60% at 50% 40%,#000 30%,transparent 75%);
}
/* ── 干员氛围层：实隐实显 ───────────────────────────────
   径向蒙版让图片边缘完全溶进背景；16 秒一次隐↔显呼吸 */
.hero-op{
  position:absolute;inset:0;z-index:0;pointer-events:none;
  background:url("/assets/hero-op.jpg") no-repeat 72% 16% / 86% auto;
  opacity:0;
  filter:brightness(.85) contrast(1.06) saturate(.88);
  -webkit-mask-image:radial-gradient(ellipse 52% 58% at 66% 42%,#000 30%,transparent 72%);
  mask-image:radial-gradient(ellipse 52% 58% at 66% 42%,#000 30%,transparent 72%);
  animation:heroOpBreath 16s ease-in-out infinite;
  will-change:opacity,transform;
}
@keyframes heroOpBreath{
  0%,100%{opacity:0;transform:scale(1)}
  16%{opacity:.52}
  48%{opacity:.52;transform:scale(1.045)}
  66%{opacity:0;transform:scale(1.07)}
}
@media (prefers-reduced-motion:reduce){
  .hero-op{animation:none;opacity:.38}
}

.hero-in{
  position:relative;z-index:1;
  width:min(100%,1180px);
  display:flex;flex-direction:column;align-items:center;
}

.hero-strip{
  width:100%;display:flex;justify-content:flex-end;gap:16px;
  font-family:var(--mono);font-size:11px;letter-spacing:.3em;color:#4E555E;
}
.hero-strip > span:empty{display:none}

.hero-mark{
  width:100%;
  height:clamp(88px,min(20vw,24vh),260px);
  margin-top:clamp(16px,3vh,30px);
}

.hero-scan{
  position:relative;width:100%;
  margin-top:clamp(2px,.6vh,8px);
}
.hero-wave{
  width:100%;
  height:clamp(42px,7vh,74px);
}

.hero-copy{
  display:flex;flex-direction:column;align-items:center;
  gap:clamp(10px,1.6vh,16px);
  margin-top:clamp(28px,5vh,50px);
  text-align:center;
}
.hero-copy h1{
  margin:0;
  font-weight:900;
  font-size:clamp(24px,min(3vw,5.4vh),44px);
  letter-spacing:.1em;line-height:1.25;
}
.hero-sub{
  margin:0;max-width:940px;
  font-size:clamp(14px,1.1vw,16px);font-weight:300;
  letter-spacing:.04em;line-height:1.9;color:var(--dim);
  text-wrap:pretty;
}
.hero-badge{
  margin:6px 0 0;padding:8px 18px;
  border:1px solid rgba(255,197,61,.45);
  border-radius:var(--r-pill);
  background:rgba(255,197,61,.07);
  font-size:clamp(12px,1vw,14px);font-weight:500;
  letter-spacing:.12em;line-height:1.6;color:var(--accent);
  box-shadow:0 0 20px rgba(255,176,58,.14),inset 0 0 14px rgba(255,197,61,.06);
}
.hero-badge strong{
  font-family:var(--mono);letter-spacing:.08em;
  user-select:all;cursor:text;
}

.hero-note{
  margin:14px 0 0;max-width:660px;
  font-size:12px;line-height:1.8;text-align:center;color:#82878D;
}

/* ── 下载按钮 ─────────────────────────────────────────── */
.dl-wrap{
  position:relative;width:fit-content;max-width:100%;
  margin-top:clamp(24px,4vh,40px);
}
.dl-wrap::before{
  content:'';position:absolute;inset:-18px;z-index:-1;
  background:radial-gradient(ellipse 60% 70% at 50% 50%,rgba(255,122,26,.2),transparent 70%);
  pointer-events:none;
}

.dl-btn{
  position:relative;overflow:hidden;
  display:flex;align-items:center;gap:clamp(18px,2vw,26px);
  width:min(100%,460px);
  padding:clamp(15px,2.2vh,22px) clamp(24px,2.6vw,34px);
  border-radius:22px;
  background:var(--grad);
  color:#05070B;
  isolation:isolate;
  box-shadow:0 8px 30px rgba(255,122,26,.32),0 2px 8px rgba(255,197,61,.25);
  transition:transform .4s cubic-bezier(.2,.8,.2,1),box-shadow .4s;
}
.dl-btn:hover{
  color:#05070B;
  transform:translateY(-3px);
  box-shadow:0 16px 44px rgba(255,122,26,.45),0 4px 14px rgba(255,197,61,.32);
}

.dl-fill{
  position:absolute;inset:0;background:#fff;
  transform-origin:left center;transform:scaleX(0);
  transition:transform .55s cubic-bezier(.76,0,.18,1);
  z-index:-1;
}
.dl-btn:hover .dl-fill{transform:scaleX(1)}

.dl-ico{
  position:relative;flex:0 0 auto;
  width:clamp(50px,6vh,60px);height:clamp(50px,6vh,60px);
  border-radius:50%;
  background:#05070B;
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;
}
.dl-btn.dark .dl-ico{background:var(--grad)}
.dl-ring{
  position:absolute;inset:4px;border-radius:50%;
  border:2px solid var(--accent);
  opacity:0;transform:scale(.6);
  transition:opacity .45s,transform .55s cubic-bezier(.2,.8,.2,1);
}
.dl-btn.dark .dl-ring{border-color:#05070B}
.dl-btn:hover .dl-ring{opacity:1;transform:scale(1)}

.dl-arrow{display:flex;flex-direction:column;align-items:center;transition:transform .45s cubic-bezier(.34,1.56,.64,1)}
.dl-btn:hover .dl-arrow{transform:translateY(3px)}
.dl-arrow i{display:block;background:var(--accent)}
.dl-btn.dark .dl-arrow i{background:#05070B}
.dl-arrow i:nth-child(1){width:2px;height:18px}
.dl-arrow i:nth-child(2){
  width:11px;height:11px;background:transparent;
  border-right:2px solid var(--accent);border-bottom:2px solid var(--accent);
  transform:rotate(45deg);margin-top:-11px;
}
.dl-btn.dark .dl-arrow i:nth-child(2){
  background:transparent;
  border-right-color:#05070B;border-bottom-color:#05070B;
}
.dl-arrow i:nth-child(3){width:18px;height:2px;margin-top:5px}

.dl-txt{
  position:relative;flex:1 1 0;min-width:0;
  display:flex;flex-direction:column;gap:6px;
}
.dl-main{font-weight:900;font-size:clamp(26px,2.6vw,36px);letter-spacing:.16em;line-height:1}
.dl-meta{
  font-family:var(--mono);font-weight:500;
  font-size:11.5px;letter-spacing:.1em;
  color:rgba(5,7,11,.66);
}

/* ── 功能 ─────────────────────────────────────────────── */
.feat{
  position:relative;
  padding:clamp(80px,10vh,112px) clamp(20px,4vw,56px);
  background:
    radial-gradient(ellipse 46% 30% at 86% 0%,rgba(255,122,26,.08),transparent 70%),
    var(--bg-2);
  border-top:1px solid var(--line);
}
.wrap{width:min(100%,1180px);margin:0 auto}

.eyebrow{
  margin:0 0 20px;
  font-family:var(--mono);font-size:12px;letter-spacing:.2em;
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;
  color:transparent;
}
.title{
  margin:0;
  font-size:clamp(28px,3vw,42px);font-weight:900;
  letter-spacing:.08em;line-height:1.4;
}
.title.sm{font-size:clamp(22px,2.2vw,30px);margin-bottom:22px;letter-spacing:.1em}

.feat-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,2.4vw,32px);
  margin-top:clamp(36px,5vh,52px);
}
.feat-card{
  position:relative;min-width:0;
  padding:30px 28px 32px;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.012));
  overflow:hidden;
  transition:transform .5s cubic-bezier(.2,.8,.2,1),border-color .5s,box-shadow .5s;
}
/* 卡片顶部渐变条：hover 时从左划入 */
.feat-card::before{
  content:'';position:absolute;left:0;top:0;height:2px;width:100%;
  background:var(--grad);
  transform-origin:left center;transform:scaleX(0);
  transition:transform .55s cubic-bezier(.76,0,.18,1);
}
/* 卡片内一团随 hover 点亮的青色氛围光 */
.feat-card::after{
  content:'';position:absolute;left:50%;top:-40%;width:120%;height:80%;
  transform:translateX(-50%);
  background:radial-gradient(ellipse 50% 60% at 50% 0%,rgba(255,197,61,.13),transparent 70%);
  opacity:0;transition:opacity .5s;
  pointer-events:none;
}
.feat-card:hover{
  transform:translateY(-5px);
  border-color:rgba(255,197,61,.35);
  box-shadow:0 18px 48px rgba(255,122,26,.18),0 4px 18px rgba(255,197,61,.12);
}
.feat-card:hover::before{transform:scaleX(1)}
.feat-card:hover::after{opacity:1}

.num{
  font-family:var(--mono);font-size:13px;letter-spacing:.2em;
  background:var(--grad);
  -webkit-background-clip:text;background-clip:text;
  color:transparent;
}
.feat-card h3{
  margin:18px 0 16px;
  font-size:clamp(20px,1.8vw,25px);font-weight:700;
  letter-spacing:.04em;line-height:1.6;
}
.feat-card p{
  margin:0;color:#B9BEC5;
  font-size:15.5px;line-height:1.9;letter-spacing:.04em;
  text-wrap:pretty;
}

.feat-two{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:clamp(32px,5vw,80px);
  margin-top:clamp(56px,8vh,80px);
  padding-top:clamp(36px,5vh,44px);
  border-top:1px solid var(--line);
}

.ticks{list-style:none;margin:0;padding:0}
.ticks li{
  position:relative;padding-left:24px;margin-top:12px;
  color:#B9BEC5;font-size:15.5px;line-height:1.9;letter-spacing:.04em;
}
.ticks li::before{
  content:'';position:absolute;left:0;top:.92em;
  width:12px;height:2px;border-radius:1px;
  background:var(--grad);
  box-shadow:0 0 8px rgba(255,176,58,.55);
}

/* ── 下载区（深底 + 渐变大字） ─────────────────────────── */
.end{
  position:relative;
  min-height:100svh;
  display:flex;flex-direction:column;justify-content:space-between;
  padding:clamp(92px,13vh,136px) clamp(20px,4vw,56px) clamp(20px,3vw,34px);
  background:
    radial-gradient(ellipse 52% 40% at 12% 88%,rgba(255,122,26,.1),transparent 70%),
    radial-gradient(ellipse 44% 34% at 88% 20%,rgba(255,197,61,.07),transparent 70%),
    var(--bg);
  border-top:1px solid var(--line);
  color:var(--ink);
  overflow:hidden;
}
.end a{color:var(--ink)}
.end a:hover{color:var(--accent)}

.end-num{
  position:absolute;right:clamp(20px,4vw,56px);top:clamp(92px,13vh,136px);
  font-family:var(--mono);font-size:12px;letter-spacing:.24em;color:#4E555E;
}

.end-body{
  flex:1 1 0;
  display:flex;flex-direction:column;justify-content:center;
  gap:clamp(26px,4.5vh,44px);
}

.end-word{
  margin:0;
  font-family:var(--mono);font-weight:700;
  font-size:clamp(60px,12vw,176px);
  line-height:.86;letter-spacing:-.03em;
  color:#F2F5F8;
  -webkit-text-stroke:0.014em #F2F5F8;
}

.end-copy{max-width:840px}
.end-copy h3{
  margin:0 0 14px;
  font-size:clamp(22px,2.5vw,34px);font-weight:900;
  letter-spacing:.06em;line-height:1.5;
}
.end-copy p{
  margin:8px 0 0;color:var(--dim);
  font-size:15.5px;line-height:1.95;letter-spacing:.04em;
}
.end-copy .pick{
  color:var(--accent);user-select:all;cursor:text;
  font-family:var(--mono);letter-spacing:.06em;
  text-shadow:0 0 14px rgba(255,176,58,.4);
}
.end-fine{color:#61676F !important;font-size:13.5px !important}

.end-cta{align-self:flex-start;width:min(100%,520px)}
.end-alt{margin:14px 0 0;font-size:13px;color:#61676F;letter-spacing:.04em}
.end-alt a{color:#9BA3AD;border-bottom:1px solid #333A44;padding-bottom:1px}
.end-alt a:hover{color:var(--accent);border-bottom-color:var(--accent)}

.foot{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px 24px;
  padding-top:18px;
  border-top:1px solid var(--line);
  font-size:12px;letter-spacing:.08em;color:#4E555E;
}
.foot span{color:#61676F}
.foot-right{display:flex;flex-wrap:wrap;gap:8px 20px}
.foot-right a{color:#61676F}
.foot-right a:hover{color:var(--accent)}

/* ── 流动渐变字（wuming 字标族） ───────────────────────
   白色 "wu" + 高饱和双色渐变 "ming"，色相 18 秒轮转一圈，
   依次呈现参考稿的蓝青 / 蓝紫 / 绿青 / 红粉四套观感 */
@keyframes hueFlow{
  from{filter:hue-rotate(0deg)}
  to{filter:hue-rotate(360deg)}
}
.grad-flow{
  background:linear-gradient(100deg,#FF7A1A 0%,#FFC53D 100%);
  -webkit-background-clip:text;background-clip:text;
  color:transparent;
  -webkit-text-stroke:0.026em #FF7A1A;
  animation:hueFlow 18s linear infinite;
}
@media (prefers-reduced-motion:reduce){
  .grad-flow{animation:none}
}

/* ── 滚动浮现 ─────────────────────────────────────────── */
.rv{
  opacity:0;transform:translateY(22px);
  transition:opacity .8s ease,transform .8s cubic-bezier(.2,.8,.2,1);
}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .rv{opacity:1;transform:none;transition:none}
}

/* ── 响应式 ───────────────────────────────────────────── */
@media (max-width:1000px){
  .feat-grid{gap:20px}
}
@media (max-width:899px){
  .feat-grid,.feat-two{grid-template-columns:minmax(0,1fr)}
  .feat-grid{gap:16px;margin-top:32px}
  .feat-two{margin-top:44px;padding-top:32px}
  .feat-card h3{margin-top:14px}
  .hero-mark{height:clamp(80px,22vw,150px)}
  .dl-main{font-size:clamp(24px,6vw,30px);letter-spacing:.12em}
}
@media (max-width:820px){
  /* 窄屏先牺牲试用码，QQ 群保留（那是对外联络入口） */
  .hd-code{display:none}
}
@media (max-width:660px){
  .hd-name{font-size:20px}
  .hd-nav{gap:14px}
  .hd-nav a i{display:none}
  .hd-nav a b{font-size:14px;letter-spacing:.06em}
  .hd-qq{padding:8px 12px;min-height:38px;gap:6px;font-size:12.5px}
  .hd-qq-ico{width:18px;height:20px}
  .hd-qq > span{font-size:12px}
  .hd-qq > b{font-size:14px}
  .hd-code > b{font-size:13px}
  .hero{padding-top:clamp(96px,14vh,126px)}
  .hero-strip{font-size:9.5px;letter-spacing:.18em}
  .end-word{font-size:clamp(52px,17vw,96px)}
  .foot{font-size:11px}
}
@media (max-width:520px){
  /* 手机端：字号不再压缩过度，保证「QQ群号」清晰可读 */
  .hd{padding-left:12px;padding-right:12px}
  .hd-qq{padding:7px 10px;min-height:38px;gap:5px}
  .hd-qq > span{font-size:13px;letter-spacing:0}
  .hd-qq > b{font-size:13.5px}
  .hd-qq-ico{width:17px;height:19px}
  .hd-name{font-size:19px}
  .hd-mark{width:8px;height:8px}
}
@media (max-width:380px){
  /* 极窄屏：只轻微收一档，文字仍清晰 */
  .hd{padding-left:10px;padding-right:10px}
  .hd-qq{padding:6px 8px;gap:4px}
  .hd-qq > span{font-size:12px}
  .hd-qq > b{font-size:12.5px}
  .hd-qq-ico{width:16px;height:18px}
  .hd-name{font-size:17px}
}
@media (max-width:420px){
  .hd-nav{display:none}
  .hero-badge{letter-spacing:.06em;font-size:11.5px}
  .dl-btn{gap:14px;padding:14px 18px;border-radius:18px}
}