/* ============================================================
   ChzuWifi 官网样式 v4 ｜ 木伞软件开发工作室
   深空科幻：星野画布 / 极光流场 / 霓虹玻璃 / 扫描光环 / 滚动渐现
   动画仅使用 transform 与 opacity，保证流畅；尊重减少动态偏好
   ============================================================ */
:root{
  --bg:#04060e; --bg2:#070c1c;
  --panel:rgba(12,20,40,.58);
  --panel-solid:#0b1328;
  --line:rgba(110,170,255,.16);
  --line-strong:rgba(120,190,255,.42);
  --cyan:#43e2fd; --cyan-soft:#9beeff;
  --blue:#4f8cff; --blue-deep:#2b5ce0;
  --violet:#8b7bff; --magenta:#d96bff;
  --text:#e7eefc; --muted:#94a3c6; --faint:#6b7aa0;
  --green:#3ddc97; --red:#ff6b81;
  --radius:16px; --radius-lg:22px;
  --glow-cyan:0 0 24px rgba(67,226,253,.35);
  --glow-blue:0 10px 34px rgba(79,140,255,.40);
  --glow-violet:0 10px 34px rgba(139,123,255,.42);
  --shadow-card:0 18px 50px rgba(0,4,16,.55);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;
  background:
    radial-gradient(1200px 700px at 80% -10%,rgba(60,110,255,.14),transparent 60%),
    radial-gradient(1000px 600px at -10% 20%,rgba(139,123,255,.10),transparent 55%),
    var(--bg);
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{max-width:1140px;margin:0 auto;padding:0 26px}
.section{padding:92px 0;position:relative}
.section-head{text-align:center;max-width:720px;margin:0 auto 56px}
.section-head h2{
  font-size:clamp(23px,3.2vw,33px);font-weight:900;letter-spacing:.6px;
  background:linear-gradient(100deg,#fff 20%,var(--cyan-soft) 55%,var(--cyan) 90%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.section-head p{margin-top:14px;color:var(--muted);font-size:15px}
.tagline-label{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:500;letter-spacing:1.6px;
  color:var(--cyan);background:rgba(67,226,253,.07);
  padding:6px 17px;border-radius:999px;margin-bottom:20px;
  border:1px solid rgba(67,226,253,.28);
  box-shadow:0 0 18px rgba(67,226,253,.12) inset;
}
.tagline-label::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);
  box-shadow:0 0 8px var(--cyan);animation:dotBlink 2.2s ease-in-out infinite;
}
@keyframes dotBlink{0%,100%{opacity:1}50%{opacity:.25}}

/* ===== 全局动态背景（JS 注入，固定视口容器裁剪，杜绝横向溢出） ===== */
.fx-wrap{position:fixed;inset:0;z-index:-2;overflow:hidden;pointer-events:none}
#fx-canvas{position:absolute;inset:0;pointer-events:none}
.fx-aurora{position:absolute;z-index:1;border-radius:50%;filter:blur(90px);
  pointer-events:none;mix-blend-mode:screen;opacity:.5}
.fx-a1{width:640px;height:640px;top:-220px;right:-160px;
  background:radial-gradient(circle,rgba(67,150,255,.55),transparent 65%);
  animation:aurora1 22s ease-in-out infinite alternate}
.fx-a2{width:560px;height:560px;top:30%;left:-240px;
  background:radial-gradient(circle,rgba(139,123,255,.45),transparent 65%);
  animation:aurora2 26s ease-in-out infinite alternate}
.fx-a3{width:520px;height:520px;bottom:-240px;right:10%;
  background:radial-gradient(circle,rgba(67,226,253,.34),transparent 65%);
  animation:aurora3 30s ease-in-out infinite alternate}
@keyframes aurora1{0%{transform:translate(0,0) scale(1)}100%{transform:translate(-90px,70px) scale(1.18)}}
@keyframes aurora2{0%{transform:translate(0,0) scale(1.1)}100%{transform:translate(110px,60px) scale(.92)}}
@keyframes aurora3{0%{transform:translate(0,0) scale(1)}100%{transform:translate(-70px,-80px) scale(1.2)}}
.fx-grid{
  position:absolute;inset:0;z-index:2;pointer-events:none;opacity:.32;
  background-image:
    linear-gradient(rgba(100,160,255,.07) 1px,transparent 1px),
    linear-gradient(90deg,rgba(100,160,255,.07) 1px,transparent 1px);
  background-size:52px 52px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 30%,transparent 75%);
}

/* ===== 导航 ===== */
.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(5,10,24,.72);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.nav::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,transparent,rgba(67,226,253,.6),rgba(139,123,255,.6),transparent);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;color:#fff;font-size:17px;letter-spacing:.4px}
.brand img{width:40px;height:40px;filter:drop-shadow(0 0 12px rgba(67,226,253,.45))}
.nav-links{display:flex;gap:32px;font-size:14.5px;font-weight:500;color:var(--muted)}
.nav-links a{position:relative;padding:6px 1px;transition:color .2s}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--violet));
  box-shadow:0 0 8px rgba(67,226,253,.7);
  transform:scaleX(0);transform-origin:left;transition:transform .28s;
}
.nav-links a:hover,.nav-links a.active{color:var(--cyan-soft)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-btn{
  position:relative;overflow:hidden;
  background:linear-gradient(135deg,var(--cyan),var(--blue));
  color:#04101f;padding:10px 23px;border-radius:11px;font-size:14px;font-weight:700;
  box-shadow:var(--glow-blue);transition:.25s;
}
.nav-btn::after{
  content:"";position:absolute;top:0;left:-80%;width:50%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);
  transform:skewX(-20deg);animation:shine 3.6s ease-in-out infinite;
}
@keyframes shine{0%,60%{left:-80%}100%{left:160%}}
.nav-btn:hover{transform:translateY(-1px);box-shadow:0 0 30px rgba(67,226,253,.55)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer}
.nav-toggle svg{width:27px;height:27px;stroke:var(--cyan)}

/* ===== Hero ===== */
.hero{padding:96px 0 110px;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;left:50%;bottom:-46%;width:1400px;height:760px;
  transform:translateX(-50%);
  background-image:
    linear-gradient(rgba(80,150,255,.13) 1px,transparent 1px),
    linear-gradient(90deg,rgba(80,150,255,.13) 1px,transparent 1px);
  background-size:56px 56px;
  perspective:600px;
  mask-image:linear-gradient(to top,#000,transparent 70%);
  -webkit-mask-image:linear-gradient(to top,#000,transparent 70%);
  animation:gridFlow 7s linear infinite;
}
@keyframes gridFlow{0%{background-position:0 0}100%{background-position:0 56px}}
.hero-inner{position:relative;z-index:2;display:flex;align-items:center;gap:54px}
.hero-text{flex:1.25}
.hero h1{
  font-size:clamp(31px,4.7vw,50px);font-weight:900;line-height:1.18;letter-spacing:1.2px;
}
.hero h1 span{
  background:linear-gradient(100deg,var(--cyan),var(--blue) 45%,var(--violet));
  background-size:200% auto;
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  animation:gradFlow 5s linear infinite;
}
@keyframes gradFlow{0%{background-position:0 50%}100%{background-position:200% 50%}}
.hero-sub{margin-top:23px;font-size:16.5px;color:var(--muted);max-width:565px;font-weight:300}
.hero-actions{margin-top:37px;display:flex;gap:16px;flex-wrap:wrap}
.btn{
  position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 31px;border-radius:12px;font-size:15.5px;font-weight:700;
  transition:transform .22s,box-shadow .22s,background .22s;cursor:pointer;border:none;overflow:hidden;
}
.btn-primary{
  background:linear-gradient(135deg,var(--cyan),var(--blue));color:#04101f;
  box-shadow:var(--glow-blue);
}
.btn-primary::after{
  content:"";position:absolute;top:0;left:-80%;width:50%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.5),transparent);
  transform:skewX(-20deg);animation:shine 3.2s ease-in-out infinite;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 34px rgba(67,226,253,.6)}
.btn-ghost{
  background:rgba(255,255,255,.05);color:var(--text);
  border:1px solid var(--line-strong);backdrop-filter:blur(6px);
}
.btn-ghost:hover{background:rgba(67,226,253,.12);border-color:var(--cyan);
  color:var(--cyan-soft);transform:translateY(-2px)}
.hero-badges{margin-top:33px;display:flex;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.hero-badges span{
  background:rgba(255,255,255,.05);border:1px solid var(--line);
  padding:7px 15px;border-radius:999px;backdrop-filter:blur(4px);
}
.hero-badges span::before{content:"✓";color:var(--cyan);margin-right:7px;font-weight:700}

/* Hero 全息徽标 */
.hero-logo{
  flex:.85;position:relative;display:flex;align-items:center;justify-content:center;
  width:min(360px,80vw);height:min(360px,80vw);margin:0 auto;
}
.hero-logo::before{
  content:"";position:absolute;inset:-6%;border-radius:50%;
  background:conic-gradient(from 0deg,transparent 12%,rgba(67,226,253,.75),transparent 38%,
    rgba(139,123,255,.7) 62%,transparent 88%);
  -webkit-mask:radial-gradient(circle,transparent 61%,#000 62.5%,#000 65%,transparent 66%);
  mask:radial-gradient(circle,transparent 61%,#000 62.5%,#000 65%,transparent 66%);
  animation:spin 7s linear infinite;
}
.hero-logo::after{
  content:"";position:absolute;inset:6%;border-radius:50%;
  border:1.4px dashed rgba(120,190,255,.35);
  animation:spin 26s linear infinite reverse;
}
@keyframes spin{to{transform:rotate(360deg)}}
.hero-logo .ring-pulse{
  position:absolute;inset:14%;border-radius:50%;border:1.5px solid rgba(67,226,253,.3);
  animation:ringPulse 3.6s ease-out infinite;
}
.hero-logo img{
  width:57%;border-radius:38px;padding:8%;position:relative;z-index:2;
  background:rgba(14,24,48,.7);border:1px solid var(--line-strong);
  backdrop-filter:blur(10px);
  filter:drop-shadow(0 24px 48px rgba(0,0,0,.55)) drop-shadow(0 0 22px rgba(67,226,253,.3));
}
.scan-line{
  position:absolute;z-index:3;left:12%;right:12%;height:2px;top:14%;border-radius:2px;
  background:linear-gradient(90deg,transparent,var(--cyan),transparent);
  box-shadow:0 0 14px var(--cyan);
  animation:scanSweep 3.4s ease-in-out infinite;
}
@keyframes scanSweep{0%,100%{top:14%;opacity:.2}50%{top:82%;opacity:1}}
.float-chip{
  position:absolute;z-index:4;display:flex;align-items:center;gap:8px;
  background:rgba(10,18,38,.72);border:1px solid var(--line-strong);
  color:#dfe9ff;font-size:13px;font-weight:500;
  padding:9px 16px;border-radius:999px;backdrop-filter:blur(8px);
  animation:floaty 5s ease-in-out infinite;white-space:nowrap;
}
.float-chip i{width:8px;height:8px;border-radius:50%;background:var(--green);
  box-shadow:0 0 10px var(--green);animation:dotBlink 2s ease-in-out infinite}
.fc1{top:5%;left:-3%}
.fc2{bottom:8%;right:-4%;animation-delay:2.5s}
.fc2 i{background:var(--violet);box-shadow:0 0 10px var(--violet)}
@keyframes ringPulse{0%{transform:scale(.82);opacity:.7}100%{transform:scale(1.16);opacity:0}}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-11px)}}

/* ===== 功能区 ===== */
.feature-group{margin-bottom:48px}
.group-title{
  display:flex;align-items:center;gap:12px;margin-bottom:25px;
  font-size:18px;font-weight:700;color:#fff;
}
.group-title::before{
  content:"";width:14px;height:14px;border-radius:4px;
  background:linear-gradient(135deg,var(--cyan),var(--blue));
  box-shadow:0 0 12px rgba(67,226,253,.55);
}
.feature-group:last-child .group-title::before{
  background:linear-gradient(135deg,var(--violet),var(--magenta));
  box-shadow:0 0 12px rgba(139,123,255,.6);
}
.group-title .pill{font-size:12px;font-weight:500;padding:4px 13px;border-radius:999px}
.pill-free{background:rgba(61,220,151,.12);color:var(--green);border:1px solid rgba(61,220,151,.28)}
.pill-vip{background:rgba(139,123,255,.14);color:#b7adff;border:1px solid rgba(139,123,255,.3)}
.cards{display:grid;gap:22px}
.cards-free{grid-template-columns:repeat(2,1fr)}
.cards-vip{grid-template-columns:repeat(4,1fr)}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:27px 25px;position:relative;overflow:hidden;backdrop-filter:blur(12px);
  transition:transform .3s,box-shadow .3s,border-color .3s;
  box-shadow:var(--shadow-card);
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--cyan),transparent);
  opacity:0;transition:opacity .3s;
}
.card:hover{transform:translateY(-7px);border-color:var(--line-strong);
  box-shadow:var(--shadow-card),0 0 26px rgba(67,226,253,.18)}
.card:hover::before{opacity:1}
.card .ico{
  width:49px;height:49px;border-radius:13px;display:flex;align-items:center;justify-content:center;
  margin-bottom:17px;position:relative;
}
.cards-free .ico,.feat-mini .card:nth-child(odd) .ico{
  background:linear-gradient(135deg,var(--cyan),var(--blue-deep));
  box-shadow:0 8px 20px rgba(67,226,253,.35)}
.cards-vip .ico{
  background:linear-gradient(135deg,var(--violet),var(--magenta));
  box-shadow:0 8px 20px rgba(139,123,255,.4)}
.card .ico svg{width:23px;height:23px;stroke:#fff;fill:none;stroke-width:1.8;
  stroke-linecap:round;stroke-linejoin:round}
.card h3{font-size:16px;font-weight:700;color:#fff;margin-bottom:7px}
.card p{font-size:13.5px;color:var(--muted);line-height:1.66}

/* ===== 使用流程 ===== */
.steps{position:relative}
.steps::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--line),transparent);
}
.steps::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--line),transparent);
}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.step{text-align:center;position:relative}
.step-num{
  width:58px;height:58px;margin:0 auto 20px;border-radius:50%;
  background:linear-gradient(135deg,var(--blue),var(--violet));color:#fff;
  font-size:21px;font-weight:700;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--glow-violet);position:relative;z-index:2;
}
.step-num::after{
  content:"";position:absolute;inset:-6px;border-radius:50%;
  border:1.5px dashed rgba(139,123,255,.4);
  animation:spin 18s linear infinite;
}
.step h3{font-size:17px;color:#fff;margin-bottom:8px;font-weight:700}
.step p{font-size:14px;color:var(--muted)}
.step:not(:last-child)::before{
  content:"";position:absolute;top:29px;left:calc(50% + 46px);width:calc(100% - 92px);height:2px;
  background:repeating-linear-gradient(90deg,rgba(139,123,255,.45) 0 8px,transparent 8px 18px);
}

/* ===== 下载带（霓虹舱体） ===== */
.download-band{position:relative}
.download-inner{
  display:flex;align-items:center;gap:58px;border-radius:var(--radius-lg);
  padding:52px 54px;position:relative;overflow:hidden;
  background:
    radial-gradient(640px 340px at 92% 0%,rgba(67,226,253,.16),transparent 60%),
    linear-gradient(150deg,rgba(16,26,52,.9),rgba(10,16,34,.92));
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-card),0 0 40px rgba(67,226,253,.1);
}
.download-inner::before{
  content:"";position:absolute;top:0;left:10%;right:10%;height:1px;
  background:linear-gradient(90deg,transparent,var(--cyan),transparent);
  animation:hLine 4s ease-in-out infinite;
}
@keyframes hLine{0%,100%{opacity:.2;left:20%;right:20%}50%{opacity:1;left:5%;right:5%}}
.download-info{flex:1}
.download-info h2{font-size:clamp(23px,3vw,30px);font-weight:900;color:#fff}
.download-info p{color:var(--muted);margin:14px 0 26px;font-weight:300}
.download-info .btn-primary{margin-bottom:6px}
.download-meta{display:flex;gap:11px;flex-wrap:wrap;margin-top:25px}
.download-meta span{
  font-size:13px;color:var(--muted);font-weight:300;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  padding:7px 15px;border-radius:10px;
}
.download-meta b{color:var(--cyan-soft);font-weight:700}
.download-action{flex-shrink:0;text-align:center}
.download-action .btn{padding:17px 44px;font-size:17px}
.download-action .small{margin-top:13px;font-size:12.5px;color:var(--faint)}

/* ===== FAQ ===== */
.faq-list{max-width:840px;margin:0 auto}
details.faq{
  background:var(--panel);border:1px solid var(--line);border-radius:14px;
  padding:0 22px;margin-bottom:15px;backdrop-filter:blur(10px);
  transition:border-color .25s,box-shadow .25s;
}
details.faq:hover{border-color:var(--line-strong);box-shadow:0 0 22px rgba(67,226,253,.12)}
details.faq summary{
  cursor:pointer;padding:18px 0;font-weight:500;color:#eaf1ff;font-size:15.5px;
  list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px;
}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::after{
  content:"+";flex-shrink:0;width:29px;height:29px;border-radius:50%;
  background:rgba(67,226,253,.1);color:var(--cyan);border:1px solid rgba(67,226,253,.3);
  font-size:19px;font-weight:400;display:flex;align-items:center;justify-content:center;
  transition:transform .3s,background .3s,color .3s;
}
details.faq[open] summary::after{
  content:"−";background:var(--cyan);color:#04101f;transform:rotate(180deg);
  box-shadow:0 0 14px rgba(67,226,253,.6);
}
details.faq .faq-a{padding:0 0 19px;font-size:14px;color:var(--muted)}

/* ===== 联系卡片 ===== */
.contact-grid{display:flex;justify-content:center;gap:24px;flex-wrap:wrap}
.contact-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:33px 36px;text-align:center;min-width:250px;flex:0 1 300px;
  backdrop-filter:blur(12px);box-shadow:var(--shadow-card);
  transition:transform .28s,box-shadow .28s,border-color .28s;
}
.contact-card:hover{transform:translateY(-6px);border-color:var(--line-strong);
  box-shadow:var(--shadow-card),0 0 28px rgba(67,226,253,.2)}
.contact-card .ico{
  width:55px;height:55px;margin:0 auto 17px;border-radius:50%;
  background:linear-gradient(135deg,var(--cyan),var(--violet));
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 10px 22px rgba(67,226,253,.4);
}
.contact-card .ico svg{width:25px;height:25px;stroke:#fff;fill:none;stroke-width:1.8}
.contact-card h3{font-size:16.5px;color:#fff;margin-bottom:7px;font-weight:700}
.contact-card p{font-size:13.5px;color:var(--muted);margin-bottom:17px}
.contact-card .btn{
  padding:10px 25px;font-size:14px;color:#04101f;
  background:linear-gradient(135deg,var(--cyan),var(--blue));
  box-shadow:var(--glow-blue);
}

/* ===== 页脚 ===== */
.footer{
  color:var(--muted);padding:54px 0 33px;font-size:13.5px;position:relative;
  background:linear-gradient(180deg,rgba(7,12,28,.4),rgba(4,7,16,.9));
}
.footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--cyan),var(--violet),transparent);
}
.footer-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:24px;align-items:flex-start}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:15px;margin-bottom:12px}
.footer-brand img{width:32px;height:32px;filter:drop-shadow(0 0 10px rgba(67,226,253,.4))}
.footer-links{display:flex;gap:24px;flex-wrap:wrap}
.footer-links a{transition:color .2s}
.footer-links a:hover{color:var(--cyan)}
.footer-copy{
  margin-top:29px;padding-top:20px;border-top:1px solid rgba(120,170,255,.12);
  font-size:12.5px;color:var(--faint);
}
.footer-copy a{color:var(--muted)}
.footer-copy a:hover{color:var(--cyan)}

/* ===== 内页头部 / 正文 ===== */
.page-hero{padding:74px 0 64px;position:relative;overflow:hidden}
.page-hero::before{
  content:"";position:absolute;left:50%;bottom:-60%;width:1200px;height:620px;
  transform:translateX(-50%);
  background-image:
    linear-gradient(rgba(80,150,255,.1) 1px,transparent 1px),
    linear-gradient(90deg,rgba(80,150,255,.1) 1px,transparent 1px);
  background-size:54px 54px;
  mask-image:linear-gradient(to top,#000,transparent 72%);
  -webkit-mask-image:linear-gradient(to top,#000,transparent 72%);
}
.page-hero::after{
  content:"";position:absolute;width:560px;height:340px;top:-40%;right:6%;
  background:radial-gradient(circle,rgba(67,226,253,.2),transparent 65%);
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{font-size:clamp(26px,3.4vw,34px);font-weight:900;
  background:linear-gradient(100deg,#fff,var(--cyan));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.page-hero p{margin-top:12px;color:var(--muted);font-weight:300;font-size:15px}
.page-body{padding:64px 0 90px}
.page-body h2{
  font-size:22px;font-weight:900;color:#fff;margin:46px 0 19px;
  display:flex;align-items:center;gap:12px;
}
.page-body h2::before{
  content:"";width:6px;height:23px;border-radius:3px;
  background:linear-gradient(180deg,var(--cyan),var(--violet));
  box-shadow:0 0 10px rgba(67,226,253,.6);
}
.page-body h2:first-child{margin-top:0}
.page-body h3{font-size:16px;color:#fff;margin:24px 0 10px;font-weight:700}
.page-body p,.page-body li{font-size:14.5px;color:#bcc8e4;margin-bottom:10px}
.page-body ul,.page-body ol{padding-left:22px}
.info-table{
  width:100%;border-collapse:collapse;background:var(--panel);backdrop-filter:blur(10px);
  border:1px solid var(--line);border-radius:14px;overflow:hidden;margin:19px 0;
}
.info-table th,.info-table td{
  padding:13px 18px;border-bottom:1px solid var(--line);
  font-size:14px;text-align:left;vertical-align:top;color:#c4d0ea;
}
.info-table tr:last-child th,.info-table tr:last-child td{border-bottom:none}
.info-table th{background:rgba(67,226,253,.07);color:var(--cyan-soft);width:190px;font-weight:600}
.plan-table{
  width:100%;border-collapse:collapse;background:var(--panel);backdrop-filter:blur(10px);
  border:1px solid var(--line);border-radius:14px;overflow:hidden;margin:21px 0;
}
.plan-table th,.plan-table td{padding:15px 18px;border-bottom:1px solid var(--line);
  font-size:14px;text-align:center;color:#c4d0ea}
.plan-table tr:last-child td{border-bottom:none}
.plan-table th{background:rgba(67,226,253,.08);color:var(--cyan-soft);font-weight:600}
.plan-table td:first-child,.plan-table th:first-child{text-align:left;font-weight:700;color:#fff}
.plan-table td:nth-child(3){color:var(--cyan);font-weight:700;font-size:15.5px}
.buy-step{
  background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--cyan);
  border-radius:14px;padding:25px 29px;margin:19px 0;backdrop-filter:blur(10px);
  box-shadow:var(--shadow-card);
}
.buy-step li{margin-bottom:10px}
.feat-mini{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:20px 0}
.feat-mini .card{padding:23px 20px}

/* ===== 法律文档（独立页） ===== */
.legal-view{padding:62px 0 92px}
.legal-article{
  max-width:860px;margin:0 auto;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius-lg);padding:52px 58px;backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
}
.legal-article h2{font-size:26px;color:#fff;font-weight:900;text-align:center;margin-bottom:8px}
.legal-date{text-align:center;font-size:13px;color:var(--muted);margin-bottom:35px}
.legal-article h3{font-size:16.5px;color:#fff;margin:29px 0 11px;font-weight:700}
.legal-article p,.legal-article li{font-size:14px;color:#bcc8e4;margin-bottom:10px}
.legal-article ul{padding-left:22px}
.legal-back{display:inline-block;margin-bottom:24px;font-size:14px;color:var(--cyan)}

/* ===== 滚动渐现 ===== */
.reveal{opacity:0;transform:translateY(26px);
  transition:opacity .75s ease,transform .75s cubic-bezier(.22,.61,.36,1)}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式：平板 ===== */
@media(max-width:960px){
  .cards-vip{grid-template-columns:repeat(2,1fr)}
  .feat-mini{grid-template-columns:repeat(2,1fr)}
  .hero-inner{flex-direction:column;text-align:center;gap:30px}
  .hero-text{order:2}
  .hero-actions,.hero-badges{justify-content:center}
  .hero-logo{order:1}
  .download-inner{flex-direction:column;gap:34px;text-align:center;padding:42px 32px}
  .download-meta{justify-content:center}
  .steps-grid{grid-template-columns:1fr;gap:38px}
  .step:not(:last-child)::before{display:none}
}

/* ===== 响应式：手机（专属布局） ===== */
@media(max-width:640px){
  .container{padding:0 18px}
  .section{padding:60px 0}
  .fx-a3{display:none}
  .fx-aurora{filter:blur(70px);opacity:.4}
  .nav-inner{height:61px}
  .brand{font-size:15px;gap:9px}
  .brand img{width:34px;height:34px}
  .nav-btn{display:none}
  .nav-toggle{display:block;padding:9px;min-width:44px;min-height:44px}
  .nav{background:rgba(8,14,30,.94);backdrop-filter:none;-webkit-backdrop-filter:none}
  .nav-links{
    display:none;position:absolute;top:100%;left:0;right:0;bottom:auto;z-index:99;
    background:rgba(8,14,30,.99);backdrop-filter:none;-webkit-backdrop-filter:none;
    flex-direction:column;gap:0;padding:8px 12px 14px;
    border:1px solid var(--line);border-top:none;
    border-radius:0 0 18px 18px;
    box-shadow:0 24px 50px rgba(0,0,0,.5);
  }
  .nav-links.open{display:flex}
  .nav-links a{
    font-size:16px;padding:16px 12px;border-bottom:1px solid var(--line);
    min-height:52px;display:flex;align-items:center;color:var(--text);
  }
  .nav-links a::after{display:none}

  .hero{padding:54px 0 64px}
  .hero-logo{width:236px;height:236px}
  .float-chip{display:none}
  .hero h1{font-size:28px;line-height:1.28}
  .hero-sub{font-size:14px;margin-top:17px}
  .hero-actions{margin-top:27px;flex-direction:column;gap:12px}
  .hero-actions .btn{width:100%;min-height:50px}
  .hero-badges{margin-top:25px;gap:9px;font-size:12px;justify-content:flex-start;text-align:left}
  .hero-badges span{padding:6px 13px}

  .section-head{margin-bottom:37px}
  .section-head h2{font-size:22px}
  .section-head p{font-size:14px}
  .group-title{font-size:16px;margin-bottom:19px}
  .cards-free,.cards-vip{grid-template-columns:1fr;gap:16px}
  .card{padding:22px 20px;display:flex;gap:16px;align-items:flex-start}
  .card .ico{width:44px;height:44px;margin-bottom:0;flex-shrink:0;border-radius:12px}
  .card .ico svg{width:21px;height:21px}
  .card .card-body{flex:1;min-width:0}
  .card h3{font-size:15.5px}
  .card p{font-size:14px}

  .steps-grid{gap:34px}
  .step{display:flex;gap:16px;text-align:left;align-items:flex-start}
  .step-num{width:49px;height:49px;margin:0;flex-shrink:0;font-size:18px}
  .step h3{font-size:15.5px}
  .step p{font-size:13.5px}

  .download-inner{padding:32px 22px;gap:27px}
  .download-info h2{font-size:21px}
  .download-info .btn-primary{width:100%;min-height:50px}
  .download-meta{gap:9px}
  .download-meta span{flex:1 1 calc(50% - 9px);text-align:center;font-size:12.5px;padding:8px 10px}
  .download-action{width:100%}
  .download-action .btn{width:100%;min-height:50px;padding:15px}

  details.faq{padding:0 16px;margin-bottom:13px}
  details.faq summary{font-size:14.5px;padding:16px 0}
  details.faq summary::after{width:27px;height:27px;font-size:17px}
  details.faq .faq-a{font-size:13.5px;padding-bottom:16px}

  .contact-card{flex:1 1 100%;min-width:0;padding:29px 24px}
  .contact-card .btn{min-height:48px}
  .footer-links a{display:inline-flex;align-items:center;min-height:44px;padding:8px 12px}

  .page-hero{padding:50px 0 46px}
  .page-hero h1{font-size:24px}
  .page-hero p{font-size:14px}
  .page-body{padding:46px 0 66px}
  .page-body h2{font-size:20px;margin:35px 0 15px}
  .page-body p,.page-body li{font-size:14px}

  /* 套餐表 → 卡片式 */
  .plan-table{border:none;background:transparent;backdrop-filter:none}
  .plan-table tbody{display:block}
  .plan-table tr{
    display:block;background:var(--panel);border:1px solid var(--line);border-radius:14px;
    margin-bottom:14px;padding:4px 16px;backdrop-filter:blur(10px);
  }
  .plan-table td{
    display:flex;justify-content:space-between;align-items:center;gap:12px;
    text-align:right;border-bottom:1px dashed var(--line);padding:11px 0;font-size:14px;
  }
  .plan-table tr td:last-child{border-bottom:none}
  .plan-table td::before{
    content:attr(data-label);color:var(--muted);font-size:13px;font-weight:500;text-align:left;
  }
  .plan-table td:first-child{font-size:15px}
  .plan-table td:nth-child(3){font-size:16px}

  /* 信息表 → 堆叠式 */
  .info-table{display:block;backdrop-filter:none}
  .info-table tr{display:block;border-bottom:1px solid var(--line);padding:12px 16px}
  .info-table tr:last-child{border-bottom:none}
  .info-table th,.info-table td{display:block;width:auto;border:none;padding:2px 0;text-align:left}
  .info-table th{background:none;margin-bottom:3px}

  .buy-step{padding:21px 18px}
  .feat-mini{grid-template-columns:1fr}
  .legal-article{padding:31px 21px;border-radius:16px}
  .legal-article h2{font-size:21px}
  .legal-article h3{font-size:15.5px}
  .legal-article p,.legal-article li{font-size:13.5px}
}

/* ============================================================
   v4.1 双主题：星夜（默认） / 晴昼（太阳、云层、光束）
   ============================================================ */

/* 昼夜背景层淡入淡出（不用 display:none，保证可过渡） */
.fx-night{position:absolute;inset:0;transition:opacity 1.8s ease,visibility 0s linear 1.8s}
.fx-day{position:absolute;inset:0;opacity:0;visibility:hidden;
  transition:opacity 1.8s ease,visibility 0s linear 1.8s}
html.theme-day .fx-night{opacity:0;visibility:hidden}
html.theme-day .fx-day{opacity:1;visibility:visible;transition:opacity 1.8s ease}

/* ===== 晴昼：太阳 ===== */
.sun{position:absolute;top:-120px;right:-120px;width:390px;height:390px}
.sun-rays{position:absolute;inset:0;border-radius:50%;
  background:repeating-conic-gradient(from 0deg,rgba(255,186,50,.55) 0deg 7deg,transparent 7deg 15deg);
  -webkit-mask:radial-gradient(circle,transparent 45%,#000 47%,#000 74%,transparent 76%);
  mask:radial-gradient(circle,transparent 45%,#000 47%,#000 74%,transparent 76%);
  animation:spin 75s linear infinite;
}
.sun-disc{position:absolute;left:50%;top:50%;width:150px;height:150px;border-radius:50%;
  transform:translate(-50%,-50%);
  background:radial-gradient(circle at 40% 35%,#fffceb,#ffe27a 46%,#ffb02e 82%);
  box-shadow:0 0 60px rgba(255,190,60,.85),0 0 130px rgba(255,200,90,.5);
  animation:sunPulse 5.5s ease-in-out infinite;
}
@keyframes sunPulse{0%,100%{transform:translate(-50%,-50%) scale(1)}
  50%{transform:translate(-50%,-50%) scale(1.055)}}

/* ===== 晴昼：光束 ===== */
.beam{position:absolute;top:-12%;right:3%;width:270px;height:150%;
  background:linear-gradient(180deg,rgba(255,242,196,.4),transparent 72%);
  transform:rotate(17deg);transform-origin:top;filter:blur(14px);
  animation:beamSway 10s ease-in-out infinite alternate;pointer-events:none}
.beam2{right:16%;width:180px;opacity:.7;animation-duration:13s;animation-delay:-4s}
@keyframes beamSway{0%{transform:rotate(13deg)}100%{transform:rotate(25deg)}}

/* ===== 晴昼：飘动云层 ===== */
.cloud{position:absolute;width:205px;height:92px;will-change:transform}
.cp{position:absolute;border-radius:50%;filter:blur(2px);
  background:radial-gradient(circle at 38% 32%,#ffffff,#eef4ff)}
.p1{width:82px;height:82px;top:8px;left:8px}
.p2{width:108px;height:108px;top:-12px;left:54px}
.p3{width:76px;height:76px;top:14px;left:122px}
.c1{top:11%;animation:drift 62s linear infinite}
.c2{top:33%;transform:scale(.68);animation:drift 88s linear -28s infinite}
.c3{top:58%;transform:scale(1.12);animation:drift 74s linear -52s infinite}
@keyframes drift{from{left:-32%}to{left:118%}}

/* ===== 主题切换按钮 ===== */
.theme-toggle{
  position:fixed;right:22px;bottom:22px;z-index:120;
  width:53px;height:53px;border-radius:50%;cursor:pointer;
  border:1px solid var(--line-strong);
  background:rgba(9,16,34,.72);backdrop-filter:blur(12px);
  box-shadow:0 10px 26px rgba(0,0,0,.45);
  display:flex;align-items:center;justify-content:center;
  transition:transform .3s,background .5s,border-color .5s;
}
.theme-toggle:hover{transform:translateY(-2px) scale(1.06)}
.theme-toggle svg{position:absolute;width:24px;height:24px;
  fill:none;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;
  transition:opacity .45s,transform .5s}
.ico-moon{stroke:#bfe9ff;opacity:1;transform:none}
.ico-sun{stroke:#ffc94d;opacity:0;transform:rotate(-90deg) scale(.5)}
html.theme-day .theme-toggle{background:rgba(255,255,255,.88);
  border-color:rgba(80,130,220,.4)}
html.theme-day .ico-moon{opacity:0;transform:rotate(90deg) scale(.5)}
html.theme-day .ico-sun{opacity:1;transform:none}

/* ===== 切换瞬间：全站颜色平滑过渡（临时类，1.2s 后移除） ===== */
.theme-anim,.theme-anim *{
  transition:background-color 1.4s ease,background 1.4s ease,
    border-color 1.2s ease,color 1s ease,fill 1s ease,stroke 1s ease,
    opacity 1.8s ease,visibility 1.8s ease,transform .6s ease,
    box-shadow 1.2s ease!important;
}

/* ===== 晴昼：页面配色覆盖 ===== */
html.theme-day{
  --panel:rgba(255,255,255,.64);
  --line:rgba(60,110,200,.18);
  --line-strong:rgba(60,110,200,.42);
  --text:#1c2c4a; --muted:#5b6c8e; --faint:#8593b0;
  --shadow-card:0 16px 42px rgba(60,100,180,.17);
}
html.theme-day body{
  background:
    radial-gradient(1000px 620px at 92% -22%,rgba(255,214,120,.55),transparent 60%),
    linear-gradient(180deg,#b9deff 0%,#e7f3ff 38%,#f7fbff 74%,#ffffff 100%);
}
html.theme-day .nav{background:rgba(255,255,255,.8);border-bottom-color:rgba(60,110,200,.2)}
html.theme-day .nav::after{background:linear-gradient(90deg,transparent,rgba(245,158,11,.6),rgba(59,130,246,.6),transparent)}
html.theme-day .brand{color:#173a6d}
html.theme-day .brand img{filter:drop-shadow(0 2px 8px rgba(60,110,200,.3))}
html.theme-day .nav-links{color:#51628a}
html.theme-day .nav-links a:hover,html.theme-day .nav-links a.active{color:#2563eb}
html.theme-day .nav-links a::after{background:linear-gradient(90deg,#3b82f6,#f59e0b);box-shadow:none}
html.theme-day .nav-btn{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;
  box-shadow:0 10px 26px rgba(59,130,246,.4)}
html.theme-day .nav-toggle svg{stroke:#2563eb}

html.theme-day .hero::before{opacity:0}
html.theme-day .hero h1{color:#15305f;-webkit-text-fill-color:#15305f}
html.theme-day .hero h1 span{
  background:linear-gradient(100deg,#f59e0b,#ef6c00);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;animation:none}
html.theme-day .hero-sub{color:#51628a}
html.theme-day .hero-badges span{background:rgba(255,255,255,.6);
  border-color:rgba(60,110,200,.22);color:#3d4d6e}
html.theme-day .hero-badges span::before{color:#2563eb}
html.theme-day .hero-logo::before{
  background:conic-gradient(from 0deg,transparent 12%,rgba(245,158,11,.8),transparent 38%,
    rgba(59,130,246,.75) 62%,transparent 88%)}
html.theme-day .hero-logo::after{border-color:rgba(60,110,200,.3)}
html.theme-day .hero-logo .ring-pulse{border-color:rgba(245,158,11,.35)}
html.theme-day .hero-logo img{background:rgba(255,255,255,.78);
  border-color:rgba(60,110,200,.3);
  filter:drop-shadow(0 18px 36px rgba(60,100,180,.3))}
html.theme-day .scan-line{background:linear-gradient(90deg,transparent,#f59e0b,transparent);
  box-shadow:0 0 14px #f59e0b}
html.theme-day .float-chip{background:rgba(255,255,255,.82);color:#2b3c5e;
  border-color:rgba(60,110,200,.28)}
html.theme-day .float-chip i{box-shadow:0 0 10px var(--green)}
html.theme-day .fc2 i{background:#f59e0b;box-shadow:0 0 10px #f59e0b}

html.theme-day .tagline-label{color:#2563eb;background:rgba(59,130,246,.09);
  border-color:rgba(59,130,246,.3);box-shadow:none}
html.theme-day .tagline-label::before{background:#2563eb;box-shadow:0 0 8px #2563eb}
html.theme-day .section-head h2{
  background:linear-gradient(100deg,#173a6d 20%,#3b82f6 80%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
html.theme-day .group-title{color:#1c2c4a}
html.theme-day .group-title::before{
  background:linear-gradient(135deg,#3b82f6,#2563eb);box-shadow:0 0 12px rgba(59,130,246,.5)}
html.theme-day .feature-group:last-child .group-title::before{
  background:linear-gradient(135deg,#fbbf24,#f97316);box-shadow:0 0 12px rgba(245,158,11,.5)}
html.theme-day .pill-vip{background:rgba(245,158,11,.13);color:#b45309;border-color:rgba(245,158,11,.3)}
html.theme-day .card h3{color:#1c2c4a}
html.theme-day .card p{color:#5b6c8e}
html.theme-day .card:hover{border-color:rgba(60,110,200,.4);
  box-shadow:var(--shadow-card),0 0 26px rgba(255,190,80,.28)}
html.theme-day .cards-free .ico{background:linear-gradient(135deg,#60a5fa,#2563eb);
  box-shadow:0 8px 20px rgba(59,130,246,.35)}
html.theme-day .cards-vip .ico{background:linear-gradient(135deg,#fbbf24,#f97316);
  box-shadow:0 8px 20px rgba(245,158,11,.38)}

html.theme-day .step-num{background:linear-gradient(135deg,#3b82f6,#f59e0b);
  box-shadow:0 10px 26px rgba(59,130,246,.35)}
html.theme-day .step-num::after{border-color:rgba(245,158,11,.4)}
html.theme-day .step h3{color:#1c2c4a}
html.theme-day .step::before,html.theme-day .step:not(:last-child)::before{
  background:repeating-linear-gradient(90deg,rgba(59,130,246,.4) 0 8px,transparent 8px 18px)}

html.theme-day .download-inner{background:
    radial-gradient(640px 340px at 92% 0%,rgba(255,205,100,.3),transparent 60%),
    linear-gradient(150deg,rgba(255,255,255,.85),rgba(238,246,255,.9));
  border-color:rgba(60,110,200,.35);
  box-shadow:0 16px 42px rgba(60,100,180,.2)}
html.theme-day .download-info h2{color:#173a6d}
html.theme-day .download-info p{color:#5b6c8e}
html.theme-day .download-meta span{background:rgba(255,255,255,.65);
  border-color:rgba(60,110,200,.2);color:#51628a}
html.theme-day .download-meta b{color:#2563eb}
html.theme-day .download-action .small{color:#8593b0}

html.theme-day details.faq summary{color:#1c2c4a}
html.theme-day details.faq summary::after{background:rgba(59,130,246,.12);
  color:#2563eb;border-color:rgba(59,130,246,.3)}
html.theme-day details.faq[open] summary::after{background:#2563eb;color:#fff;
  box-shadow:0 0 14px rgba(59,130,246,.5)}
html.theme-day details.faq .faq-a{color:#5b6c8e}

html.theme-day .contact-card .ico{background:linear-gradient(135deg,#3b82f6,#f59e0b);
  box-shadow:0 10px 22px rgba(59,130,246,.35)}
html.theme-day .contact-card h3{color:#1c2c4a}
html.theme-day .contact-card p{color:#5b6c8e}
html.theme-day .contact-card .btn{background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;
  box-shadow:0 10px 24px rgba(59,130,246,.35)}

html.theme-day .page-hero::before{opacity:0}
html.theme-day .page-hero::after{background:radial-gradient(circle,rgba(255,200,90,.3),transparent 65%)}
html.theme-day .page-hero h1{
  background:linear-gradient(100deg,#173a6d,#3b82f6);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
html.theme-day .page-hero p{color:#5b6c8e}
html.theme-day .page-body h2{color:#1c2c4a}
html.theme-day .page-body h2::before{background:linear-gradient(180deg,#3b82f6,#f59e0b);box-shadow:none}
html.theme-day .page-body h3{color:#1c2c4a}
html.theme-day .page-body p,html.theme-day .page-body li{color:#3d4d6e}
html.theme-day .info-table th{background:rgba(59,130,246,.1);color:#173a6d}
html.theme-day .info-table td{color:#3d4d6e}
html.theme-day .plan-table th{background:rgba(59,130,246,.11);color:#173a6d}
html.theme-day .plan-table td{color:#3d4d6e}
html.theme-day .plan-table td:first-child{color:#1c2c4a}
html.theme-day .plan-table td:nth-child(3){color:#2563eb}
html.theme-day .buy-step{border-left-color:#2563eb}

html.theme-day .legal-article h2{color:#1c2c4a}
html.theme-day .legal-article h3{color:#1c2c4a}
html.theme-day .legal-article p,html.theme-day .legal-article li{color:#3d4d6e}
html.theme-day .legal-date{color:#5b6c8e}

html.theme-day .footer{background:linear-gradient(180deg,rgba(232,242,255,.6),#eef4ff)}
html.theme-day .footer::before{background:linear-gradient(90deg,transparent,#3b82f6,#f59e0b,transparent)}
html.theme-day .footer-brand{color:#173a6d}
html.theme-day .footer-brand img{filter:drop-shadow(0 2px 8px rgba(60,110,200,.3))}
html.theme-day .footer{color:#5b6c8e}
html.theme-day .footer-links a:hover{color:#2563eb}
html.theme-day .footer-copy{border-top-color:rgba(60,110,200,.16);color:#8593b0}
html.theme-day .footer-copy a{color:#5b6c8e}
html.theme-day .footer-copy a:hover{color:#2563eb}

/* ===== 晴昼：手机端 ===== */
@media(max-width:640px){
  .sun{width:280px;height:280px;top:-95px;right:-95px}
  .sun-disc{width:108px;height:108px}
  .c3{display:none}
  .beam{width:180px;filter:blur(10px)}
  .beam2{display:none}
  .theme-toggle{width:48px;height:48px;right:16px;bottom:16px}
  .theme-toggle svg{width:21px;height:21px}
}

/* 尊重减少动态偏好 */
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
  .fx-grid,.fx-aurora{display:none}
  .sun-rays,.cloud,.beam{animation:none!important}
}

/* ============================================================
   v4.2 时间流速过渡：晨昏色、日月升降、按钮钟表光环
   ============================================================ */

/* 晨昏色过渡层（日落 / 日出） */
.fx-dusk{position:absolute;inset:0;opacity:0;pointer-events:none}
html.switch-night .fx-dusk{
  background:
    radial-gradient(130% 75% at 50% 118%,rgba(255,138,52,.82),rgba(196,74,92,.42) 42%,transparent 72%),
    linear-gradient(180deg,rgba(24,26,66,.5),transparent 48%);
  animation:duskFlow 2.1s ease-in-out forwards;
}
html.switch-day .fx-dusk{
  background:
    radial-gradient(130% 75% at 50% 118%,rgba(255,176,90,.72),rgba(220,120,150,.36) 42%,transparent 72%),
    linear-gradient(180deg,rgba(60,70,130,.32),transparent 48%);
  animation:duskFlow 2.1s ease-in-out forwards;
}
@keyframes duskFlow{0%{opacity:0}42%{opacity:1}100%{opacity:0}}

/* 月亮（位于星夜层） */
.moon{position:absolute;top:9%;left:7%;width:92px;height:92px;border-radius:50%;
  background:radial-gradient(circle at 38% 34%,#ffffff,#e6edf8 60%,#cdd8ec);
  box-shadow:0 0 42px rgba(220,232,255,.55),inset -10px -12px 24px rgba(120,140,180,.35)}
.moon i{position:absolute;border-radius:50%;background:rgba(150,165,195,.4)}
.moon .m1{width:18px;height:18px;top:24px;left:20px}
.moon .m2{width:12px;height:12px;top:52px;left:46px}
.moon .m3{width:9px;height:9px;top:22px;left:54px}

/* 太阳沉下 / 升上 */
@keyframes sinkSun{
  0%{transform:translate(0,0) scale(1);opacity:1}
  70%{opacity:.9}
  100%{transform:translate(-46px,170px) scale(.5);opacity:0}}
@keyframes riseSun{
  0%{transform:translate(-46px,170px) scale(.5);opacity:0}
  55%{opacity:1}
  100%{transform:translate(0,0) scale(1);opacity:1}}
html.switch-night .sun{animation:sinkSun 2.1s ease-in forwards}
html.switch-day .sun{animation:riseSun 2.1s ease-out forwards}

/* 月亮落下 / 升起 */
@keyframes setMoon{
  0%{transform:translateY(0) scale(1);opacity:1}
  100%{transform:translateY(-130px) scale(.6);opacity:0}}
@keyframes riseMoon{
  0%{transform:translateY(150px) scale(.6);opacity:0}
  100%{transform:translateY(0) scale(1);opacity:1}}
html.switch-night .moon{animation:setMoon 2.1s ease-in forwards}
html.switch-day .moon{animation:riseMoon 2.1s ease-out forwards}

/* 切换中云层更快隐去 / 显现 */
html.switch-night .cloud{opacity:0!important;transition:opacity .7s ease}

/* 按钮钟表式旋转光环 */
.theme-toggle.busy::before{
  content:'';position:absolute;inset:-5px;border-radius:50%;
  border:2px solid transparent;border-top-color:#ffc94d;border-right-color:#7dd3fc;
  animation:spin .75s linear infinite;
}

@media(max-width:640px){
  .moon{width:64px;height:64px;top:10%;left:6%}
  .moon .m1{width:12px;height:12px;top:17px;left:14px}
  .moon .m2{width:9px;height:9px;top:36px;left:32px}
  .moon .m3{width:7px;height:7px;top:16px;left:38px}
}

/* v4.3 手机端导航 X5 兼容：白天面板配色（无模糊滤镜，杜绝黑带） */
@media(max-width:640px){
  html.theme-day .nav{background:rgba(255,255,255,.96);
    backdrop-filter:none;-webkit-backdrop-filter:none}
  html.theme-day .nav-links{background:rgba(255,255,255,.99);
    border-color:rgba(60,110,200,.2);
    box-shadow:0 24px 50px rgba(60,100,180,.25)}
  html.theme-day .nav-links a{color:#1c2c4a;
    border-bottom-color:rgba(60,110,200,.14)}
}

/* v4.4 夜→昼流星雨顶层画布 */
.fx-meteors{position:fixed;inset:0;width:100%;height:100%;
  pointer-events:none;z-index:60;opacity:0;
  transition:opacity .35s ease}
html.switch-day .fx-meteors{opacity:1}

/* v4.6 夜→昼：深色停留层（保证流星雨在黑色天幕上划过） */
.fx-hold{position:fixed;inset:-4vh 0 0 0;height:108vh;z-index:4;
  pointer-events:none;opacity:0;
  background:radial-gradient(1200px 800px at 70% -10%,
    #16274f 0%,#0b1428 45%,#070d1c 100%)}
@keyframes holdNight{
  0%{opacity:1}
  46%{opacity:1}
  100%{opacity:0}}
html.switch-day .fx-hold{animation:holdNight 1.3s ease forwards}
@media (prefers-reduced-motion: reduce){
  html.switch-day .fx-hold{animation:none;opacity:0}
}

/* v4.7 流星雨画布快速淡入（覆盖全局 1.8s 过渡） */
html.theme-anim.switch-day .fx-meteors{
  transition:opacity .25s ease!important;
  opacity:1}

/* v4.8 切换主题期间暂停环境循环动画，降低手机端卡顿 */
html.switching .sun-rays,
html.switching .beam,
html.switching .cloud,
html.switching .fx-aurora,
html.switching .fx-grid{animation-play-state:paused}

/* ============================================================
   v4.9 手机端性能：去掉背景模糊，切换时不再逐帧重采样
   ============================================================ */
@media (max-width:640px){
  *{backdrop-filter:none!important;-webkit-backdrop-filter:none!important}
  :root{--panel:rgba(10,18,38,.95)}
  html.theme-day{--panel:rgba(255,255,255,.95)}
  .fx-aurora{filter:blur(42px)!important;opacity:.22!important}
  .beam{filter:blur(6px)!important}
}

/* ============================================================
   v5.0 电脑端：会员功能卡片持续左右流光（手机端不启用）
   ============================================================ */
@media (min-width:641px){
  .cards-vip .card::after{
    content:"";position:absolute;top:0;bottom:0;width:40%;left:0;
    pointer-events:none;
    background:linear-gradient(105deg,transparent 0%,
      rgba(170,195,255,.08) 42%,rgba(255,255,255,.15) 50%,
      rgba(170,195,255,.08) 58%,transparent 100%);
    transform:translateX(-270%);
    animation:cardFlow 5.6s ease-in-out infinite;
  }
  .cards-vip .card:nth-child(4n+2)::after{animation-delay:.7s}
  .cards-vip .card:nth-child(4n+3)::after{animation-delay:1.4s}
  .cards-vip .card:nth-child(4n)::after{animation-delay:2.1s}
  @keyframes cardFlow{
    0%{transform:translateX(-270%)}
    52%{transform:translateX(430%)}
    100%{transform:translateX(430%)}
  }
  /* 晴昼主题：流光改为暖白色 */
  html.theme-day .cards-vip .card::after{
    background:linear-gradient(105deg,transparent 0%,
      rgba(255,255,255,.22) 42%,rgba(255,255,255,.5) 50%,
      rgba(255,255,255,.22) 58%,transparent 100%);
  }
}
@media (prefers-reduced-motion: reduce){
  .cards-vip .card::after{animation:none;opacity:0}
}