/* ===== 于瀚瀚老师 · 高途一对一 ===== */
:root{
  --bg:#060b1a;
  --bg-2:#0a1226;
  --card:rgba(255,255,255,.038);
  --card-2:rgba(255,255,255,.06);
  --line:rgba(160,180,220,.13);
  --line-2:rgba(160,180,220,.22);
  --text:#eef3fb;
  --text-2:#a3b1c9;
  --text-3:#6f7f9c;
  --gold:#e8c46a;
  --gold-2:#f9e4af;
  --navy:#122a6e;
  --blue:#5b8cff;
  --r:22px;
  --r-sm:14px;
  --wrap:1180px;
  --shadow:0 24px 60px rgba(0,0,0,.55);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--text);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  line-height:1.75;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
svg{width:18px;height:18px;fill:currentColor;flex:none}
::selection{background:rgba(232,196,106,.28)}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 26px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;border-radius:999px;
  font-weight:700;font-size:15px;padding:12px 25px;border:1px solid transparent;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s;white-space:nowrap;cursor:pointer}
.btn-lg{padding:15px 30px;font-size:16px}
.btn-gold{background:linear-gradient(135deg,var(--gold-2),var(--gold));color:#141c33;
  box-shadow:0 14px 32px rgba(232,196,106,.26)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 18px 40px rgba(232,196,106,.38)}
.btn-line{border-color:var(--line-2);color:var(--text);background:rgba(255,255,255,.03)}
.btn-line:hover{background:rgba(255,255,255,.08);transform:translateY(-2px)}
.btn span{font-weight:400}

/* ---------- 导航 ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:90;
  background:rgba(6,11,26,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:26px;height:68px}
.brand{display:flex;align-items:center;gap:11px;flex:none}
.logo{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--gold-2),var(--gold));color:#141c33;font-weight:800;font-size:19px;
  box-shadow:0 6px 18px rgba(232,196,106,.3)}
.brand-txt strong{display:block;font-size:15px;letter-spacing:.2px}
.brand-txt small{display:block;font-size:11.5px;color:var(--text-3);letter-spacing:.4px}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:14.5px;color:var(--text-2)}
.nav-links a{position:relative;padding:4px 0;transition:color .2s}
.nav-links a:hover{color:var(--gold-2)}
.nav-links a::after{content:"";position:absolute;left:0;right:100%;bottom:-2px;height:1.5px;
  background:var(--gold);transition:right .28s var(--ease)}
.nav-links a:hover::after{right:0}
.nav-acts{display:flex;align-items:center;gap:14px;flex:none}
.tel{display:inline-flex;align-items:center;gap:7px;font-size:14.5px;font-weight:600;color:var(--text-2);transition:color .2s}
.tel:hover{color:var(--gold-2)}
.nav-acts .btn{padding:10px 20px;font-size:14.5px}

/* ---------- HERO ---------- */
.hero{position:relative;padding:132px 0 68px;overflow:hidden}
.hero-bg{position:absolute;inset:0;pointer-events:none;z-index:0}
.hero-bg .glow{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.hero-bg .g1{width:620px;height:620px;left:-180px;top:-140px;
  background:radial-gradient(circle,rgba(43,86,196,.55),transparent 68%)}
.hero-bg .g2{width:700px;height:700px;right:-220px;top:-60px;
  background:radial-gradient(circle,rgba(232,196,106,.22),transparent 66%)}
.hero-bg .stars{position:absolute;inset:0;
  background-image:radial-gradient(1.4px 1.4px at 18% 22%,rgba(255,255,255,.55),transparent),
                   radial-gradient(1.2px 1.2px at 72% 14%,rgba(255,255,255,.4),transparent),
                   radial-gradient(1.6px 1.6px at 84% 46%,rgba(255,255,255,.32),transparent),
                   radial-gradient(1.2px 1.2px at 34% 62%,rgba(255,255,255,.3),transparent);
  opacity:.8}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.04fr .96fr;
  gap:54px;align-items:center}
.tag{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:600;
  color:var(--gold-2);background:rgba(232,196,106,.1);border:1px solid rgba(232,196,106,.26);
  padding:7px 15px;border-radius:999px;margin-bottom:24px}
.tag svg{width:14px;height:14px}
.hero h1{font-size:clamp(34px,4.1vw,54px);line-height:1.18;font-weight:800;letter-spacing:-.5px}
.hero h1 span{display:block}
.hero h1 em{font-style:normal;background:linear-gradient(120deg,var(--gold-2),var(--gold) 60%,#d8a83f);
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero-desc{margin-top:22px;font-size:16px;color:var(--text-2);max-width:540px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}
.hero-points{display:flex;gap:26px;flex-wrap:wrap;margin-top:30px;font-size:14px;color:var(--text-2)}
.hero-points li{display:flex;align-items:center;gap:8px}
.hero-points li::before{content:"";width:6px;height:6px;border-radius:50%;
  background:var(--gold);box-shadow:0 0 8px rgba(232,196,106,.9)}

/* 舞台(人物) */
.hero-visual{position:relative}
.stage{position:relative;width:100%;max-width:432px;margin:0 auto;aspect-ratio:4/5;
  border-radius:28px;overflow:hidden;isolation:isolate;
  background:
    radial-gradient(120% 78% at 50% 8%,rgba(58,108,230,.55),transparent 62%),
    linear-gradient(170deg,#152a68 0%,#0d1a44 46%,#080f28 100%);
  border:1px solid rgba(160,190,255,.2);
  box-shadow:var(--shadow),inset 0 0 90px rgba(90,140,255,.18)}
.stage-glow{position:absolute;left:50%;top:46%;transform:translate(-50%,-50%);
  width:82%;aspect-ratio:1;border-radius:50%;filter:blur(46px);
  background:radial-gradient(circle,rgba(232,196,106,.34),transparent 66%);z-index:0}
.stage-photo{position:absolute;left:0;bottom:0;width:100%;z-index:1;display:block;
  filter:drop-shadow(0 18px 34px rgba(0,0,0,.5))}
.stage-photo img{width:100%;height:auto;display:block}
.stage-badge{position:absolute;left:16px;top:16px;z-index:2;display:inline-flex;align-items:center;gap:7px;
  font-size:12.5px;font-weight:700;color:#141c33;letter-spacing:.3px;
  background:linear-gradient(135deg,var(--gold-2),var(--gold));padding:7px 13px;border-radius:999px;
  box-shadow:0 8px 20px rgba(0,0,0,.35)}
.stage-badge svg{width:13px;height:13px}

.plate{width:100%;max-width:432px;margin:16px auto 0;padding:20px 22px;border-radius:var(--r-sm);
  background:var(--card);border:1px solid var(--line);backdrop-filter:blur(10px)}
.plate-top{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.plate-top h3{font-size:19px;font-weight:800}
.plate-tag{font-size:11.5px;font-weight:700;color:var(--gold-2);background:rgba(232,196,106,.12);
  border:1px solid rgba(232,196,106,.3);padding:3px 11px;border-radius:999px}
.plate-list{display:flex;flex-direction:column;gap:10px;font-size:14px;color:var(--text-2)}
.plate-list li{display:flex;gap:9px;align-items:baseline}
.plate-list li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--gold);
  flex:none;transform:translateY(-3px)}
.plate-list b{color:var(--gold-2);font-weight:700}

/* ---------- 数据条 ---------- */
.stats{margin-top:74px;padding:34px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.022),transparent)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);text-align:center}
.stat{padding:8px 14px;position:relative}
.stat + .stat::before{content:"";position:absolute;left:0;top:14%;bottom:14%;width:1px;
  background:linear-gradient(180deg,transparent,var(--line-2),transparent)}
.stat b{display:block;font-size:clamp(28px,3.4vw,40px);font-weight:800;letter-spacing:-.5px;
  background:linear-gradient(180deg,var(--gold-2),var(--gold));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat b i{font-style:normal;font-size:.46em;margin-left:2px}
.stat span{font-size:13px;color:var(--text-3)}

/* ---------- 通用区块 ---------- */
.sec{padding:86px 0}
.sec-alt{background:linear-gradient(180deg,rgba(255,255,255,.022),transparent 60%)}
.sec-label{display:inline-block;font-size:13px;font-weight:700;letter-spacing:1.4px;
  color:var(--gold);text-transform:uppercase;margin-bottom:14px}
.sec-title{font-size:clamp(25px,3vw,36px);font-weight:800;letter-spacing:-.4px;margin-bottom:38px}

/* 关于我 */
.about-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:stretch}
.about-text p{color:var(--text-2);font-size:15.5px;margin-bottom:16px}
.about-text blockquote{margin-top:24px;padding:16px 22px;border-left:3px solid var(--gold);
  background:rgba(232,196,106,.06);border-radius:0 12px 12px 0;
  font-size:15px;color:var(--gold-2);font-weight:600}
.about-cards{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-content:stretch;grid-auto-rows:1fr}
.fcard{background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);padding:20px 18px;
  display:flex;flex-direction:column;justify-content:center;
  transition:transform .24s var(--ease),border-color .24s,background .24s}
.fcard:hover{transform:translateY(-4px);border-color:rgba(232,196,106,.3);background:var(--card-2)}
.ficon{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;margin-bottom:13px;
  background:rgba(232,196,106,.12);color:var(--gold)}
.ficon svg{width:20px;height:20px}
.fcard strong{display:block;font-size:15px;margin-bottom:3px}
.fcard small{display:block;font-size:12.5px;color:var(--text-3);line-height:1.55}

/* 优势 */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.acard{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:28px 26px;overflow:hidden;transition:transform .24s var(--ease),border-color .24s}
.acard:hover{transform:translateY(-5px);border-color:rgba(232,196,106,.32)}
.acard::after{content:"";position:absolute;right:-40px;top:-40px;width:120px;height:120px;border-radius:50%;
  background:radial-gradient(circle,rgba(232,196,106,.16),transparent 70%)}
.anum{display:inline-block;font-size:13px;font-weight:800;letter-spacing:1px;color:var(--gold);
  margin-bottom:12px}
.acard h3{font-size:17.5px;font-weight:700;margin-bottom:8px}
.acard p{font-size:14px;color:var(--text-2)}

/* 流程 */
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.fstep{background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:22px 20px;position:relative;transition:transform .24s var(--ease),border-color .24s}
.fstep:hover{transform:translateY(-4px);border-color:rgba(232,196,106,.3)}
.fn{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;margin-bottom:14px;
  font-size:14px;font-weight:800;color:#141c33;background:linear-gradient(135deg,var(--gold-2),var(--gold))}
.fstep strong{display:block;font-size:15px;margin-bottom:5px}
.fstep small{font-size:12.5px;color:var(--text-3)}

/* 试听 */
.trial-box{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;
  padding:44px 42px;border-radius:var(--r);
  background:linear-gradient(150deg,rgba(30,62,150,.5),rgba(12,22,52,.72));
  border:1px solid rgba(160,190,255,.2);box-shadow:var(--shadow)}
.trial-copy p{color:var(--text-2);font-size:15.5px;margin-bottom:26px}
.trial-copy .sec-title{margin-bottom:16px}
.trial-steps{display:flex;flex-direction:column;gap:12px}
.trial-steps li{display:flex;align-items:center;gap:14px;padding:14px 18px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.05);border:1px solid var(--line)}
.sn{display:grid;place-items:center;width:28px;height:28px;border-radius:50%;flex:none;
  font-size:13px;font-weight:800;color:var(--gold-2);border:1.5px solid rgba(232,196,106,.5)}
.trial-steps strong{display:block;font-size:14.5px}
.trial-steps small{display:block;font-size:12px;color:var(--text-3)}

/* FAQ */
.faq{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:18px 24px;transition:border-color .24s,background .24s}
.faq details[open]{border-color:rgba(232,196,106,.3);background:var(--card-2)}
.faq summary{cursor:pointer;font-size:15.5px;font-weight:600;list-style:none;position:relative;padding-right:26px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:0;top:-2px;font-size:20px;font-weight:400;
  color:var(--gold);transition:transform .25s var(--ease)}
.faq details[open] summary::after{content:"–"}
.faq details p{margin-top:12px;font-size:14.5px;color:var(--text-2)}

/* 联系 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:start}
.cinfo{display:flex;flex-direction:column;gap:14px}
.citem{display:flex;align-items:center;gap:16px;padding:20px 22px;border-radius:var(--r-sm);
  background:var(--card);border:1px solid var(--line);transition:border-color .24s,background .24s,transform .24s var(--ease)}
a.citem:hover{border-color:rgba(232,196,106,.34);background:var(--card-2);transform:translateY(-3px)}
.cicon{display:grid;place-items:center;width:44px;height:44px;border-radius:13px;flex:none;
  background:rgba(91,140,255,.14);color:var(--blue)}
.cicon svg{width:20px;height:20px}
.citem small{display:block;font-size:12.5px;color:var(--text-3)}
.citem strong{display:block;font-size:16px;font-weight:700;letter-spacing:.2px}

.qr-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px;text-align:center}
.qr-head{display:flex;align-items:center;gap:13px;text-align:left;margin-bottom:20px;
  padding-bottom:18px;border-bottom:1px solid var(--line)}
.qr-avatar{display:grid;place-items:center;width:44px;height:44px;border-radius:13px;flex:none;
  font-weight:800;font-size:18px;color:#141c33;background:linear-gradient(140deg,var(--gold-2),var(--gold))}
.qr-head strong{display:block;font-size:14.5px}
.qr-head small{display:block;font-size:12.5px;color:var(--text-3);margin-top:2px}
.qr-box{background:#fff;border-radius:16px;padding:12px;max-width:232px;margin:0 auto}
.qr-box img{width:100%;border-radius:8px}
.qr-tip{margin-top:16px;font-size:14.5px;font-weight:600;color:var(--text-2)}

/* 页脚 */
.foot{padding:38px 0;border-top:1px solid var(--line)}
.foot-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  font-size:13px;color:var(--text-3)}

/* 悬浮按钮 */
.floaty{position:fixed;right:22px;bottom:22px;z-index:80;display:flex;flex-direction:column;
  align-items:flex-end;gap:12px}
.fbtn{display:inline-flex;align-items:center;gap:8px;font-size:15px;font-weight:700;color:#141c33;
  padding:14px 24px;border-radius:999px;background:linear-gradient(135deg,var(--gold-2),var(--gold));
  box-shadow:0 14px 34px rgba(232,196,106,.38);transition:transform .22s var(--ease)}
.fbtn:hover{transform:translateY(-2px)}
.top{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;font-size:18px;
  color:var(--text-2);background:rgba(255,255,255,.07);border:1px solid var(--line-2);
  backdrop-filter:blur(8px);transition:color .2s,background .2s}
.top:hover{color:var(--gold-2);background:rgba(255,255,255,.13)}

/* ---------- 入场动画 (无JS时内容正常显示) ---------- */
.js .reveal{opacity:0;transform:translateY(20px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .hero{padding:112px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .hero-copy{text-align:center}
  .hero-desc{margin-left:auto;margin-right:auto}
  .hero-cta,.hero-points{justify-content:center}
  .stats-grid{grid-template-columns:1fr 1fr;gap:22px 0}
  .stat:nth-child(3)::before{display:none}
  .about-grid{grid-template-columns:1fr;gap:34px}
  .adv-grid{grid-template-columns:1fr 1fr}
  .flow-grid{grid-template-columns:1fr 1fr}
  .trial-box{grid-template-columns:1fr;gap:34px;padding:36px 28px}
  .contact-grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  .wrap{padding:0 18px}
  .nav-links,.tel{display:none}
  .hero{padding:98px 0 44px}
  .hero h1{font-size:clamp(29px,8vw,38px)}
  .hero-cta{flex-direction:column}
  .hero-cta .btn{width:100%}
  .sec{padding:62px 0}
  .sec-title{margin-bottom:28px}
  .adv-grid,.flow-grid,.about-cards{grid-template-columns:1fr}
  .stats{margin-top:52px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .stat + .stat::before{display:none}
  .stage{max-width:340px}
  .plate{max-width:340px}
  .floaty{right:14px;bottom:14px}
  .fbtn{padding:12px 20px;font-size:14px}
  .faq details{padding:16px 18px}
  .qr-card{padding:20px}
}