/* ============================================================
   教培老师个人品牌单页站 —— 样式表 v2
   配色：深色底 + 红金点缀
   ============================================================ */

:root{
  --bg:#0a0c11;
  --bg-soft:#0f121a;
  --bg-card:#141821;
  --bg-card-2:#181d28;
  --line:rgba(255,255,255,.07);
  --line-2:rgba(255,255,255,.12);
  --text:#f4f6fa;
  --text-2:#aab3c3;
  --text-3:#717a8b;
  --red:#e8384f;
  --red-2:#ff5c6e;
  --gold:#e8c26a;
  --gold-2:#f7dfa6;
  --r:20px;
  --r-sm:14px;
  --wrap:1200px;
  --shadow:0 20px 54px rgba(0,0,0,.5);
  --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","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
svg{width:18px;height:18px;fill:currentColor;flex:none}
::selection{background:rgba(232,56,79,.35)}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 28px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;
  border-radius:999px;font-weight:600;font-size:15px;
  padding:12px 24px;border:1px solid transparent;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background .22s;
  white-space:nowrap;letter-spacing:.01em;
}
.btn-primary{
  background:linear-gradient(135deg,var(--red-2),var(--red));
  color:#fff;box-shadow:0 10px 26px rgba(232,56,79,.3);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 36px rgba(232,56,79,.45)}
.btn-ghost{background:rgba(255,255,255,.045);border-color:var(--line-2);color:var(--text)}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.22)}
.btn-lg{padding:15px 32px;font-size:16px}
.arw{transition:transform .22s var(--ease)}
.btn:hover .arw{transform:translateX(4px)}

/* ---------- 导航 ---------- */
.nav{
  position:sticky;top:0;z-index:60;
  background:rgba(10,12,17,.85);
  backdrop-filter:blur(16px) saturate(160%);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:30px;height:74px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand-logo{
  width:42px;height:42px;border-radius:12px;flex:none;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--red-2),var(--red));
  color:#fff;font-size:18px;font-weight:800;
  box-shadow:0 6px 18px rgba(232,56,79,.35);
}
.brand-text{display:flex;flex-direction:column;line-height:1.35}
.brand-text strong{font-size:15.5px;letter-spacing:.01em}
.brand-text small{font-size:11.5px;color:var(--text-3)}

.nav-links{display:flex;gap:28px;margin-left:auto}
.nav-links a{
  font-size:14.5px;color:var(--text-3);transition:color .2s;
  position:relative;padding:4px 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:1.5px;
  background:linear-gradient(90deg,var(--gold),var(--gold-2));
  transform:scaleX(0);transform-origin:left;transition:transform .25s var(--ease);
}
.nav-links a:hover{color:var(--text)}
.nav-links a:hover::after,
.nav-links a.is-active::after{transform:scaleX(1)}
.nav-links a.is-active{color:var(--text)}

.nav-actions{display:flex;align-items:center;gap:16px;flex:none}
.nav-phone{display:flex;align-items:center;gap:7px;font-size:14.5px;color:var(--text-2);transition:color .2s}
.nav-phone:hover{color:var(--text)}
.nav-phone svg{width:15px;height:15px}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:78px 0 52px}
.glow{position:absolute;border-radius:50%;filter:blur(120px);pointer-events:none}
.glow-a{width:560px;height:560px;left:-160px;top:-200px;background:rgba(232,56,79,.15)}
.glow-b{width:480px;height:480px;right:-140px;top:-140px;background:rgba(232,194,106,.085)}

.hero-grid{
  position:relative;display:grid;gap:60px;
  grid-template-columns:1fr .88fr;align-items:center;
}

.pill{
  display:inline-flex;align-items:center;
  font-size:12.5px;color:var(--gold);letter-spacing:.05em;
  border:1px solid rgba(232,194,106,.28);
  background:rgba(232,194,106,.06);
  padding:7px 16px;border-radius:999px;margin-bottom:28px;
}

.hero-copy h1{
  font-size:clamp(40px,5.2vw,62px);
  line-height:1.22;font-weight:800;letter-spacing:-.015em;
}
.hero-copy h1 .line{display:block}
.hero-copy h1 .hl{
  background:linear-gradient(100deg,var(--gold),var(--gold-2) 55%,var(--gold));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-desc{
  margin-top:28px;font-size:16.5px;color:var(--text-2);
  max-width:32em;line-height:1.85;
}

.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:36px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:30px}
.hero-points li{
  position:relative;padding-left:24px;font-size:14px;color:var(--text-2);
}
.hero-points li::before{
  content:"✓";position:absolute;left:0;top:0;color:var(--gold);font-weight:700;font-size:13px;
}

/* ---------- 图片区（含优雅占位） ---------- */
.hero-visual{position:relative}
.photo-frame{
  position:relative;border-radius:26px;overflow:hidden;
  aspect-ratio:4/4.6;
  background:linear-gradient(165deg,#fdf7ec 0%,#f3e6d2 45%,#e8d5ba 100%);
  border:1px solid rgba(255,255,255,.1);
  box-shadow:var(--shadow);
}
.photo-frame.tall{aspect-ratio:4/5}
/* 图片存在时隐藏占位层；图片被 onerror 移除后占位层自动露出 */
.photo-frame:has(img) .ph-ph,
.qr-img:has(img) .ph-qr{display:none}

.photo-frame img{position:relative;z-index:2;width:100%;height:100%;object-fit:cover}
.ph-ph{
  position:absolute;inset:0;z-index:1;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;
}
.ph-ch{
  font-size:clamp(72px,9vw,110px);font-weight:700;color:#c9a96b;
  line-height:1;letter-spacing:.02em;
}
.ph-tx{
  font-size:12.5px;color:#a08d6d;letter-spacing:.18em;
  padding-top:14px;border-top:1px solid rgba(201,169,107,.3);
}
.photo-caption{
  position:absolute;z-index:3;left:24px;bottom:22px;
  font-size:27px;font-weight:800;color:#c1911f;
  letter-spacing:.06em;font-style:italic;
  text-shadow:0 1px 8px rgba(255,255,255,.55);
}

.status-chip{
  position:absolute;top:20px;left:-18px;z-index:5;
  display:flex;align-items:center;gap:11px;
  background:rgba(20,24,33,.94);border:1px solid var(--line-2);
  padding:11px 18px;border-radius:15px;backdrop-filter:blur(10px);
  box-shadow:0 12px 30px rgba(0,0,0,.45);
}
.status-chip .dot{
  width:8px;height:8px;border-radius:50%;background:#33d17a;flex:none;
  box-shadow:0 0 0 4px rgba(51,209,122,.16);
  animation:pulse 2.2s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{box-shadow:0 0 0 4px rgba(51,209,122,.16)}
  50%{box-shadow:0 0 0 7px rgba(51,209,122,.05)}
}
.status-chip span{display:flex;flex-direction:column;line-height:1.4}
.status-chip strong{font-size:13.5px}
.status-chip small{font-size:11.5px;color:var(--text-3)}

.cert-chip{
  position:absolute;right:-16px;bottom:40px;z-index:5;
  display:flex;align-items:center;gap:11px;
  background:rgba(20,24,33,.96);border:1px solid var(--line-2);
  padding:12px 18px;border-radius:15px;backdrop-filter:blur(10px);
  box-shadow:0 12px 30px rgba(0,0,0,.45);
}
.cert-icon{
  width:28px;height:28px;border-radius:9px;flex:none;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--red-2),var(--red));font-size:14px;font-weight:700;
}
.cert-chip span{display:flex;flex-direction:column;line-height:1.4}
.cert-chip strong{font-size:13px}
.cert-chip small{font-size:11px;color:var(--text-3)}

/* ---------- 数据背书 ---------- */
.stats{
  padding:60px 0 40px;border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.014),transparent);
}
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:0;text-align:center;
}
.stat{padding:8px 20px;position:relative}
.stat + .stat::before{
  content:"";position:absolute;left:0;top:12%;bottom:12%;width:1px;
  background:linear-gradient(180deg,transparent,var(--line-2) 25%,var(--line-2) 75%,transparent);
}
.stat b{
  display:block;font-size:clamp(36px,4.6vw,52px);font-weight:800;line-height:1.1;
  letter-spacing:-.02em;
  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{display:block;margin-top:10px;font-size:13.5px;color:var(--text-3);letter-spacing:.01em}

.trust{margin-top:56px;text-align:center}
.trust-title{font-size:13px;color:var(--text-3);margin-bottom:20px;letter-spacing:.03em}
.tags{display:flex;flex-wrap:wrap;gap:11px;justify-content:center}
.tag{
  font-size:13.5px;color:var(--text-2);
  border:1px solid var(--line-2);border-radius:999px;
  padding:8px 18px;background:rgba(255,255,255,.028);
  transition:.2s;
}
.tag:hover{border-color:rgba(232,194,106,.35);color:var(--gold)}

/* ---------- 通用区块 ---------- */
.section{padding:100px 0;border-bottom:1px solid var(--line)}
.sec-label{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;color:var(--red-2);
  letter-spacing:.13em;font-weight:700;margin-bottom:16px;
}
.sec-label::before{
  content:"";width:22px;height:1.5px;
  background:linear-gradient(90deg,var(--red-2),transparent);
}
.sec-title{
  font-size:clamp(28px,3.5vw,42px);font-weight:800;line-height:1.3;
  letter-spacing:-.015em;
}
.sec-sub{margin-top:16px;font-size:15.5px;color:var(--text-2);max-width:38em;line-height:1.8}

/* ---------- 关于老师 ---------- */
.about{padding:100px 0;border-bottom:1px solid var(--line)}
.about-grid{display:grid;grid-template-columns:.82fr 1.18fr;gap:64px;align-items:start}
.about-visual{position:relative;position:sticky;top:100px}
.about-card{
  position:absolute;left:16px;right:16px;bottom:16px;z-index:4;
  background:linear-gradient(135deg,rgba(232,56,79,.94),rgba(190,38,58,.94));
  border-radius:15px;padding:14px 20px;backdrop-filter:blur(6px);
  box-shadow:0 12px 30px rgba(0,0,0,.35);
}
.about-card strong{display:block;font-size:17px;letter-spacing:.02em}
.about-card small{font-size:11.5px;color:rgba(255,255,255,.85)}

/* ---------- 手机微信卡片叠放 ---------- */
.phone-card{
  position:absolute;right:-30px;bottom:-30px;z-index:6;
  width:200px;
  background:#1a1d26;border:1px solid var(--line-2);
  border-radius:22px;overflow:hidden;
  box-shadow:0 20px 50px rgba(0,0,0,.55);
  transform:rotate(2deg);
  transition:transform .3s var(--ease);
}
.phone-card:hover{transform:rotate(0) translateY(-4px)}
.phone-head{
  display:flex;align-items:center;gap:10px;
  padding:12px 14px;border-bottom:1px solid var(--line);
}
.phone-head img{
  width:36px;height:36px;border-radius:10px;object-fit:cover;flex:none;
}
.phone-info{display:flex;flex-direction:column;line-height:1.3}
.phone-info strong{font-size:12.5px;font-weight:600}
.phone-info small{font-size:10.5px;color:var(--text-3);margin-top:2px}
.phone-mock{
  background:#0d0f14;padding:10px;
}
.phone-statusbar{
  display:flex;justify-content:space-between;
  font-size:9px;color:var(--text-3);margin-bottom:10px;padding:0 4px;
}
.phone-chat{display:flex;flex-direction:column;gap:8px}
.phone-msg{
  background:#2a2d36;border-radius:10px 10px 10px 3px;
  padding:8px 10px;max-width:85%;
}
.phone-msg p{font-size:10.5px;color:var(--text-2);line-height:1.5}
.phone-msg-me{
  background:linear-gradient(135deg,var(--red-2),var(--red));
  border-radius:10px 10px 3px 10px;
  align-self:flex-end;
}
.phone-msg-me p{color:#fff}

@media (max-width:720px){
  .phone-card{right:10px;bottom:-20px;width:170px}
}


.quote{
  border:1px solid rgba(232,56,79,.4);
  background:linear-gradient(135deg,rgba(232,56,79,.09),rgba(232,56,79,.03));
  border-radius:var(--r-sm);
  padding:22px 26px;font-size:15.5px;color:#ffc9d0;
  margin-bottom:30px;line-height:1.8;
}
.quote cite{
  display:block;margin-top:12px;font-size:13px;
  color:rgba(255,201,208,.65);font-style:normal;
}
.about-name{font-size:clamp(30px,3.6vw,42px);font-weight:800;letter-spacing:-.015em;line-height:1.25}
.about-meta{margin-top:10px;font-size:13.5px;color:var(--text-3)}
.about-body{margin-top:28px;display:flex;flex-direction:column;gap:16px;max-width:34em}
.about-body p{font-size:15.5px;color:var(--text-2);line-height:1.85}

.credo{
  margin-top:30px;padding:18px 22px;
  border-left:3px solid var(--gold);
  background:linear-gradient(90deg,rgba(232,194,106,.07),transparent);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  font-size:16px;color:var(--text);line-height:1.7;
}

.quals{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:36px}
.qual{
  display:flex;gap:13px;align-items:flex-start;
  background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--r-sm);padding:17px 18px;
  transition:border-color .22s,transform .22s var(--ease),background .22s;
}
.qual:hover{border-color:rgba(232,194,106,.3);background:var(--bg-card-2);transform:translateY(-2px)}
.q-ico{
  width:32px;height:32px;border-radius:10px;flex:none;display:grid;place-items:center;
  background:rgba(232,194,106,.11);color:var(--gold);font-size:14px;font-weight:700;
}
.qual strong{display:block;font-size:14.5px;line-height:1.5}
.qual small{display:block;margin-top:5px;font-size:12.5px;color:var(--text-3);line-height:1.6}

/* ---------- 课程卡片 ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:48px}
.card{
  position:relative;overflow:hidden;
  background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--r);padding:30px 26px 28px;
  transition:border-color .25s,transform .25s var(--ease),box-shadow .25s;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,var(--red),transparent);
  transform:scaleX(0);transform-origin:left;transition:transform .3s var(--ease);
}
.card:hover{
  border-color:var(--line-2);transform:translateY(-5px);
  box-shadow:0 18px 40px rgba(0,0,0,.4);
}
.card:hover::before{transform:scaleX(1)}
.card-hot{
  border-color:rgba(232,56,79,.32);
  background:linear-gradient(165deg,rgba(232,56,79,.07),var(--bg-card) 55%);
}
.card-hot::before{transform:scaleX(1)}
.card-tag{
  display:inline-block;font-size:11.5px;letter-spacing:.06em;
  color:var(--text-3);border:1px solid var(--line-2);
  padding:4px 11px;border-radius:999px;margin-bottom:16px;
}
.card-tag.hot{color:#fff;background:linear-gradient(135deg,var(--red-2),var(--red));border-color:transparent}
.card h3{font-size:20px;font-weight:700;letter-spacing:-.01em}
.card p{margin-top:12px;font-size:14.5px;color:var(--text-2);line-height:1.75;min-height:3.5em}
.card-list{margin-top:18px;display:flex;flex-direction:column;gap:9px;
  padding-top:16px;border-top:1px solid var(--line)}
.card-list li{position:relative;padding-left:18px;font-size:13.5px;color:var(--text-3)}
.card-list li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:5px;
  border-radius:50%;background:var(--red-2);opacity:.8}

/* ---------- 试听 ---------- */
.section-trial{background:var(--bg-soft)}
.trial-box{display:grid;grid-template-columns:1.05fr .95fr;gap:60px;align-items:center}
.trial-desc{
  margin:18px 0 30px;font-size:15.5px;color:var(--text-2);
  max-width:30em;line-height:1.85;
}
.trial-steps{display:flex;flex-direction:column;gap:14px}
.trial-steps li{
  display:flex;gap:18px;align-items:center;
  background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--r-sm);padding:19px 22px;
  transition:border-color .22s,transform .22s var(--ease);
}
.trial-steps li:hover{border-color:rgba(232,56,79,.3);transform:translateX(4px)}
.trial-steps b{
  color:var(--gold);font-size:15px;letter-spacing:.05em;flex:none;
  font-weight:800;
}
.trial-steps span{font-size:14.5px;color:var(--text-2)}

/* ---------- 服务流程 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:48px}
.flow li{
  position:relative;
  background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--r);padding:28px 24px;
  transition:border-color .22s,transform .22s var(--ease);
}
.flow li:hover{border-color:rgba(232,194,106,.28);transform:translateY(-4px)}
.flow li:not(:last-child)::after{
  content:"→";position:absolute;right:-16px;top:50%;transform:translateY(-50%);
  color:var(--text-3);font-size:15px;opacity:.5;
}
.flow b{font-size:12.5px;color:var(--red-2);letter-spacing:.12em;font-weight:800}
.flow h4{margin-top:13px;font-size:17px;font-weight:700;letter-spacing:-.01em}
.flow p{margin-top:9px;font-size:13.5px;color:var(--text-3);line-height:1.7}

/* ---------- FAQ ---------- */
.faq{margin-top:40px;display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq details{
  background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--r-sm);padding:20px 24px;
  transition:border-color .22s,background .22s;
}
.faq details:hover{border-color:var(--line-2)}
.faq details[open]{border-color:rgba(232,56,79,.35);background:var(--bg-card-2)}
.faq summary{
  cursor:pointer;font-size:16px;font-weight:600;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:18px;
  letter-spacing:-.005em;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";color:var(--text-3);font-size:20px;line-height:1;font-weight:400;
  transition:transform .22s var(--ease),color .22s;
}
.faq details[open] summary::after{content:"–";color:var(--red-2)}
.faq p{
  margin-top:16px;font-size:14.5px;color:var(--text-2);line-height:1.85;
  padding-top:14px;border-top:1px solid var(--line);
}

/* ---------- 联系 ---------- */
.contact{background:var(--bg-soft)}
.contact-grid{display:grid;grid-template-columns:1fr .82fr;gap:26px;margin-top:48px;align-items:start}
.contact-list{display:flex;flex-direction:column;gap:14px}
.contact-list li{
  display:flex;gap:18px;align-items:center;
  background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--r);padding:22px 24px;
  transition:border-color .22s,transform .22s var(--ease);
}
.contact-list li:hover{border-color:var(--line-2);transform:translateX(4px)}
.c-ico{
  width:40px;height:40px;border-radius:12px;flex:none;display:grid;place-items:center;
  background:rgba(232,56,79,.11);color:var(--red-2);font-size:16px;
}
.contact-list small{display:block;font-size:12.5px;color:var(--text-3)}
.contact-list strong{display:block;font-size:18px;margin-top:4px;letter-spacing:.02em}

.qr-card{
  background:var(--bg-card);border:1px solid var(--line);
  border-radius:var(--r);padding:28px;text-align:center;
}
.qr-head{
  display:flex;align-items:center;gap:13px;text-align:left;
  margin-bottom:22px;padding-bottom:20px;border-bottom:1px solid var(--line);
}
.qr-avatar{
  width:42px;height:42px;border-radius:12px;flex:none;object-fit:cover;
}
.qr-head strong{display:block;font-size:15px}
.qr-head small{display:block;font-size:12px;color:var(--text-3);margin-top:2px}
.qr-img{
  position:relative;background:#fff;border-radius:16px;
  aspect-ratio:1;max-width:240px;margin:0 auto;
  display:grid;place-items:center;overflow:hidden;
}
.qr-img img{position:relative;z-index:2;width:100%;height:100%;object-fit:contain;padding:12px}
.ph-qr{
  position:absolute;inset:0;z-index:1;display:grid;place-items:center;
  background:repeating-linear-gradient(45deg,#fafafa,#fafafa 8px,#f2f2f2 8px,#f2f2f2 16px);
}
.ph-qr-ch{
  font-size:20px;font-weight:700;color:#c9c9c9;line-height:1.3;text-align:center;
  letter-spacing:.08em;
}
.qr-tip{margin-top:20px;font-size:15px;font-weight:600}
.qr-sub{margin-top:7px;font-size:12.5px;color:var(--text-3);line-height:1.7}

/* ---------- 页脚 ---------- */
.foot{padding:38px 0}
.foot-inner{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}

/* ---------- 右下角浮标 ---------- */
.floaty{
  position:fixed;right:26px;bottom:26px;z-index:80;
  display:flex;flex-direction:column;align-items:flex-end;gap:12px;
}
.floaty-btn{
  display:inline-flex;align-items:center;gap:9px;
  background:linear-gradient(135deg,var(--red-2),var(--red));
  color:#fff;font-weight:600;font-size:15px;
  padding:14px 26px;border-radius:999px;
  box-shadow:0 14px 34px rgba(232,56,79,.42);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease);
}
.floaty-btn:hover{transform:translateY(-3px);box-shadow:0 20px 42px rgba(232,56,79,.55)}
.top-btn{
  width:44px;height:44px;border-radius:50%;display:grid;place-items:center;
  background:rgba(255,255,255,.07);border:1px solid var(--line-2);
  color:var(--text-2);font-size:17px;transition:.2s;
  backdrop-filter:blur(8px);
}
.top-btn:hover{background:rgba(255,255,255,.15);color:var(--text)}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero-visual{max-width:480px;margin:0 auto;width:100%}
  .about-grid{grid-template-columns:1fr;gap:44px}
  .about-visual{max-width:440px;margin:0 auto;width:100%;position:static}
  .cards{grid-template-columns:1fr 1fr}
  .trial-box{grid-template-columns:1fr;gap:40px}
  .contact-grid{grid-template-columns:1fr;gap:24px}
  .qr-card{max-width:400px}
}
@media (max-width:860px){
  .nav-links{display:none}
  .flow{grid-template-columns:1fr 1fr}
  .flow li:not(:last-child)::after{display:none}
}
@media (max-width:720px){
  .wrap{padding:0 20px}
  .hero{padding:52px 0 36px}
  .hero-copy h1{font-size:clamp(34px,8vw,44px)}
  .stats-grid{grid-template-columns:1fr 1fr;gap:36px 12px}
  .stat{padding:4px 10px}
  .stat + .stat::before{display:none}
  .section,.about{padding:68px 0}
  .cards{grid-template-columns:1fr}
  .card p{min-height:0}
  .flow{grid-template-columns:1fr}
  .quals{grid-template-columns:1fr}
  .nav-phone{display:none}
  .nav-inner{height:66px;gap:14px}
  .brand-text small{display:none}
  .status-chip{left:0}
  .cert-chip{right:0;bottom:24px}
  .about-visual{position:static}
  .floaty{right:16px;bottom:16px}
  .floaty-btn{padding:12px 20px;font-size:14px}
  .top-btn{display:none}
  .contact-list li,.card,.flow li{padding:22px 20px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* ===== 手机端深度优化 ===== */
@media (max-width:720px){
  /* 导航栏更紧凑 */
  .nav-inner{height:60px;gap:10px}
  .brand-logo{width:36px;height:36px;font-size:16px;border-radius:10px}
  .brand-text strong{font-size:14px}
  .nav-actions .btn-primary{padding:9px 16px;font-size:13px}

  /* Hero区域 */
  .hero{padding:36px 0 28px}
  .hero-grid{gap:32px}
  .pill{font-size:11.5px;padding:6px 13px;margin-bottom:20px}
  .hero-copy h1{font-size:clamp(30px,8.5vw,40px);line-height:1.25}
  .hero-desc{font-size:15px;margin-top:20px;line-height:1.8}
  .hero-cta{flex-direction:column;gap:10px;margin-top:26px}
  .hero-cta .btn{width:100%;justify-content:center;padding:14px 20px}
  .hero-points{gap:8px 16px;margin-top:20px}
  .hero-points li{font-size:13px}

  /* 照片卡片在手机上不要太高 */
  .photo-frame{aspect-ratio:4/4.2;border-radius:20px}
  .photo-frame.tall{aspect-ratio:4/4.6}
  .photo-caption{font-size:20px;left:16px;bottom:16px}

  /* 浮动标签在手机上不要超出 */
  .status-chip{left:8px;top:12px;padding:8px 12px;border-radius:12px}
  .status-chip strong{font-size:12px}
  .status-chip small{font-size:10px}
  .cert-chip{right:8px;bottom:16px;padding:8px 12px;border-radius:12px}
  .cert-chip strong{font-size:11.5px}
  .cert-chip small{font-size:10px}
  .cert-icon{width:24px;height:24px;font-size:12px}

  /* 数据区 */
  .stats{padding:36px 0 28px}
  .stat b{font-size:32px}
  .stat span{font-size:12px;margin-top:6px}
  .trust{margin-top:32px}
  .trust-title{font-size:12px;margin-bottom:14px}
  .tag{font-size:12.5px;padding:6px 14px}

  /* 区块间距 */
  .section,.about{padding:52px 0}
  .sec-label{font-size:11.5px;margin-bottom:12px}
  .sec-title{font-size:26px;line-height:1.35}
  .sec-sub{font-size:14.5px;margin-top:12px}

  /* 关于老师 */
  .about-grid{gap:32px}
  .about-card{left:10px;right:10px;bottom:10px;padding:12px 16px}
  .about-card strong{font-size:15px}
  .about-card small{font-size:10.5px}
  .quote{padding:16px 18px;font-size:14px;margin-bottom:22px}
  .about-name{font-size:26px}
  .about-body{margin-top:20px;gap:12px}
  .about-body p{font-size:14.5px}
  .credo{margin-top:22px;padding:14px 16px;font-size:14.5px}
  .quals{gap:10px;margin-top:24px}
  .qual{padding:14px 14px}
  .qual strong{font-size:13.5px}
  .qual small{font-size:11.5px}

  /* 课程卡片 */
  .cards{gap:14px;margin-top:28px}
  .card{padding:22px 18px}
  .card h3{font-size:18px}
  .card p{font-size:14px}

  /* 试听区 */
  .trial-box{gap:24px}
  .trial-desc{font-size:14.5px;margin:14px 0 22px}
  .trial-steps li{padding:14px 16px}

  /* 服务流程 */
  .flow{gap:14px;margin-top:28px}
  .flow li{padding:20px 18px}

  /* FAQ */
  .faq{margin-top:24px;gap:10px}
  .faq details{padding:16px 18px}
  .faq summary{font-size:15px}
  .faq p{font-size:14px}

  /* 联系区 */
  .contact-grid{gap:16px;margin-top:28px}
  .contact-list{gap:10px}
  .contact-list li{padding:16px 18px}
  .contact-list strong{font-size:16px}
  .qr-card{padding:20px 16px}
  .qr-head{margin-bottom:16px;padding-bottom:14px}

  /* 浮动按钮 */
  .floaty{right:12px;bottom:12px;gap:10px}
  .floaty-btn{padding:12px 18px;font-size:13.5px;box-shadow:0 10px 24px rgba(232,56,79,.4)}

  /* 页脚 */
  .foot{padding:24px 0}
  .foot-inner{font-size:12px}
}

/* ===== 手机端布局修复 v2 ===== */
@media (max-width:720px){
  /* 首屏布局改为flex纵向 */
  .hero-grid{display:flex;flex-direction:column;gap:32px}
  .hero-visual{width:100%;max-width:100%;position:relative}
  
  /* 照片卡片：固定比例，正常显示 */
  .photo-frame{
    aspect-ratio:4/4.5;
    width:100%;
    border-radius:20px;
    overflow:hidden;
  }
  
  /* 在线标签：改成照片左上角的小标签，不飘出去 */
  .status-chip{
    position:absolute;
    top:12px;left:12px;
    padding:6px 12px;
    border-radius:10px;
    z-index:10;
  }
  
  /* 认证标签：改成照片底部的小标签 */
  .cert-chip{
    position:absolute;
    bottom:12px;right:12px;
    padding:6px 12px;
    border-radius:10px;
    z-index:10;
  }
  
  /* 关于老师区域 */
  .about-visual{position:relative}
  .about-card{
    position:absolute;
    left:12px;right:12px;bottom:12px;
    padding:12px 16px;
    border-radius:12px;
  }
  
  /* 确保内容不重叠 */
  .about{padding-top:50px}
}