/* ============================================================
   云暖·肆芳 学居 · 云南七席  |  共用视觉系统
   Apple-inspired: 留白 / 衬线 / 克制 / 金色点睛
   ============================================================ */

:root{
  --ink:#1a1a1a;
  --ink-2:#2b2b2b;
  --ink-mute:#6b6b6b;
  --ink-faint:#9a9a9a;
  --paper:#fbfaf7;
  --paper-2:#f4f2ec;
  --gold:#b08d57;
  --gold-2:#8e6f3f;
  --line:rgba(26,26,26,.10);
  --shadow:0 12px 40px rgba(26,26,26,.10);
  --serif:'Cormorant Garamond','Noto Serif SC',Georgia,serif;
  --sans:'Inter','Noto Sans SC',-apple-system,BlinkMacSystemFont,'Helvetica Neue',sans-serif;
  --max:1120px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);
  color:var(--ink);
  background:var(--paper);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}

/* ---------- 排版 ---------- */
h1,h2,h3,h4,.serif{font-family:var(--serif);font-weight:500}
.eyebrow{
  font-size:12px;letter-spacing:.24em;text-transform:uppercase;
  color:var(--gold-2);font-weight:600;
}
h1{font-size:clamp(40px,7vw,84px);line-height:1.08;letter-spacing:-.02em}
h2{font-size:clamp(30px,4.6vw,52px);line-height:1.18;letter-spacing:-.01em}
h3{font-size:clamp(20px,2.4vw,28px);line-height:1.35}
p{color:var(--ink-mute)}
.lead{font-size:clamp(16px,1.6vw,19px);color:var(--ink-mute);max-width:34em;line-height:1.9}

.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 32px}
section{padding:clamp(72px,12vw,128px) 0}
section.tight{padding:clamp(56px,8vw,88px) 0}
.sec-head{text-align:center;margin-bottom:clamp(48px,7vw,80px)}
.sec-head .eyebrow{display:block;margin-bottom:18px}
.sec-head h2{margin-bottom:18px}
.sec-head .lead{margin:0 auto}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 34px;font-size:15px;letter-spacing:.04em;
  border-radius:2px;transition:.35s cubic-bezier(.2,.7,.3,1);
  font-weight:500;
}
.btn-gold{background:var(--gold);color:#fff}
.btn-gold:hover{background:var(--gold-2);transform:translateY(-2px);box-shadow:0 14px 30px rgba(176,141,87,.35)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn-line{background:transparent;color:var(--ink);border-bottom:1px solid var(--ink);border-radius:0;padding:8px 2px}
.btn-line:hover{color:var(--gold-2);border-color:var(--gold-2)}

/* ---------- 导航 ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  backdrop-filter:saturate(180%) blur(18px);
  -webkit-backdrop-filter:saturate(180%) blur(18px);
  background:rgba(251,250,247,.82);
  border-bottom:1px solid transparent;
  transition:.3s;
}
.nav.scrolled{border-bottom-color:var(--line);box-shadow:0 2px 24px rgba(26,26,26,.04)}
.nav-in{max-width:var(--max);margin:0 auto;padding:0 32px;height:68px;display:flex;align-items:center;justify-content:space-between}
.brand{font-family:var(--serif);font-size:23px;letter-spacing:.02em;display:flex;align-items:baseline;gap:10px}
.brand small{font-size:11px;letter-spacing:.2em;color:var(--gold-2);font-family:var(--sans)}
.nav-links{display:flex;gap:38px;align-items:center}
.nav-links a{font-size:14px;color:var(--ink-mute);transition:.3s;position:relative}
.nav-links a:hover{color:var(--ink)}
.nav-links a::after{content:'';position:absolute;left:0;bottom:-6px;width:0;height:1px;background:var(--gold);transition:.3s}
.nav-links a:hover::after{width:100%}
.nav-cta{font-size:13px!important;color:#fff!important;background:var(--gold);padding:9px 20px;border-radius:2px}
.nav-cta::after{display:none}
.nav-cta:hover{background:var(--gold-2)}
.lang{font-size:12px;letter-spacing:.16em;color:var(--ink-faint);border-left:1px solid var(--line);padding-left:18px}
.menu-btn{display:none;flex-direction:column;gap:5px;padding:8px}
.menu-btn span{width:22px;height:1.5px;background:var(--ink)}

/* ---------- Hero ---------- */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;overflow:hidden;padding-top:68px}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;filter:brightness(.62)}
.hero::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.35) 0%,rgba(0,0,0,.55) 100%)}
.hero .container{position:relative;z-index:2;color:#fff}
.hero .eyebrow{color:#e8d9bd;letter-spacing:.3em}
.hero h1{color:#fff;margin:24px 0 26px;font-weight:400}
.hero h1 em{font-style:italic;color:#e8d9bd}
.hero .lead{color:rgba(255,255,255,.86);font-size:clamp(16px,1.5vw,19px);max-width:30em}
.hero-actions{margin-top:44px;display:flex;gap:16px;flex-wrap:wrap}
.hero-actions .btn-ghost{color:#fff;border-color:rgba(255,255,255,.6)}
.hero-actions .btn-ghost:hover{background:#fff;color:var(--ink);border-color:#fff}
.hero-meta{margin-top:80px;display:flex;gap:56px;flex-wrap:wrap}
.hero-meta div{font-size:13px;letter-spacing:.06em;color:rgba(255,255,255,.75)}
.hero-meta strong{display:block;font-family:var(--serif);font-size:32px;color:#fff;font-weight:400;letter-spacing:0}

/* ---------- 通用块 ---------- */
.cards{display:grid;gap:28px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);padding:40px 34px;transition:.5s cubic-bezier(.2,.7,.3,1)}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(176,141,87,.35)}
.card .num{font-family:var(--serif);font-size:15px;color:var(--gold-2);letter-spacing:.1em;display:block;margin-bottom:16px}
.card h3{margin-bottom:14px}
.card p{font-size:14.5px;line-height:1.85}

.split{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.split.alt{grid-template-columns:1.1fr .9fr}
.split-text h2{margin-bottom:22px}
.split-text .lead{margin-bottom:30px}
.split-img{position:relative;aspect-ratio:4/5;overflow:hidden}
.split-img img{width:100%;height:100%;object-fit:cover;transition:.8s}
.split-img:hover img{transform:scale(1.04)}
.frame{border:1px solid var(--line);padding:14px;background:#fff}
.frame-cap{font-size:12px;letter-spacing:.1em;color:var(--ink-faint);margin-top:14px;text-align:center}

/* ---------- 时间轴 ---------- */
.track{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.track-row{display:grid;grid-template-columns:120px 1fr 1.4fr;gap:40px;padding:34px 0;border-bottom:1px solid var(--line)}
.track-row:last-child{border-bottom:none}
.track-day{font-family:var(--serif);font-size:26px;color:var(--gold-2)}
.track-day small{display:block;font-family:var(--sans);font-size:12px;letter-spacing:.16em;color:var(--ink-faint);margin-top:6px}
.track-title{font-size:19px;font-weight:500;line-height:1.5}
.track-desc{font-size:14.5px;color:var(--ink-mute);line-height:1.85}

/* ---------- 标签页 ---------- */
.tabs{display:flex;gap:0;border-bottom:1px solid var(--line);margin-bottom:56px;flex-wrap:wrap}
.tab{padding:16px 28px 16px 0;margin-right:28px;font-size:15px;color:var(--ink-faint);position:relative;transition:.3s}
.tab:hover{color:var(--ink-mute)}
.tab.active{color:var(--ink)}
.tab.active::after{content:'';position:absolute;left:0;bottom:-1px;width:100%;height:2px;background:var(--gold)}
.tab-panel{display:none}
.tab-panel.active{display:block}

/* ---------- 手风琴 ---------- */
.acc{border-bottom:1px solid var(--line)}
.acc-head{width:100%;text-align:left;padding:26px 0;display:flex;justify-content:space-between;align-items:center;font-size:18px;font-weight:500;color:var(--ink)}
.acc-head span:last-child{font-family:var(--serif);font-size:24px;color:var(--gold-2);transition:.35s}
.acc.open .acc-head span:last-child{transform:rotate(45deg)}
.acc-body{max-height:0;overflow:hidden;transition:.55s cubic-bezier(.2,.7,.3,1)}
.acc.open .acc-body{max-height:500px}
.acc-body p{padding-bottom:26px;max-width:60em;font-size:15.5px}

/* ---------- 价格 ---------- */
.price{background:var(--ink);color:#fff}
.price .eyebrow{color:#d9c39a}
.price h2{color:#fff}
.price .lead{color:rgba(255,255,255,.7)}
.price-card{background:#232322;padding:48px 40px;border:1px solid rgba(255,255,255,.08)}
.price-card.feature{border-color:var(--gold);background:#2a2a28}
.price-card .from{font-size:13px;letter-spacing:.16em;color:var(--gold);text-transform:uppercase}
.price-card .num{font-family:var(--serif);font-size:52px;color:#fff;line-height:1;margin:16px 0 6px;font-weight:400}
.price-card .num small{font-size:16px;color:var(--ink-faint)}
.price-card h3{color:#fff;margin-bottom:8px;font-size:22px}
.price-card .who{font-size:13px;color:var(--ink-faint);margin-bottom:28px;letter-spacing:.04em}
.price-card ul{list-style:none;margin-bottom:34px}
.price-card li{font-size:14px;color:rgba(255,255,255,.72);padding:9px 0;border-bottom:1px solid rgba(255,255,255,.06)}
.price-card li::before{content:'—';color:var(--gold);margin-right:12px}

/* ---------- 对比表 ---------- */
.compare{width:100%;border-collapse:collapse;font-size:15px}
.compare th,.compare td{padding:22px 20px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.compare th{font-family:var(--serif);font-size:19px;font-weight:500;width:22%}
.compare th.us{background:var(--ink);color:#fff}
.compare td.us{background:rgba(26,26,26,.03);font-weight:500}
.compare tr:hover td{background:rgba(176,141,87,.04)}

/* ---------- 导师 / 学员 ---------- */
.profile{display:grid;grid-template-columns:200px 1fr;gap:48px;padding:48px 0;border-bottom:1px solid var(--line)}
.profile:last-child{border-bottom:none}
.avatar{width:200px;height:200px;background:var(--paper-2);display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:64px;color:var(--gold-2);border:1px solid var(--line)}
.profile-info h3{font-size:26px;margin-bottom:8px}
.profile-info .role{font-size:13px;letter-spacing:.12em;color:var(--gold-2);margin-bottom:6px}
.profile-info .field{font-size:14px;color:var(--ink);margin-bottom:18px;font-weight:500}
.profile-info p{font-size:15px;line-height:1.9}
.tags{margin-top:20px;display:flex;gap:8px;flex-wrap:wrap}
.tag{font-size:12px;padding:5px 14px;border:1px solid var(--line);color:var(--ink-mute);letter-spacing:.04em}

.story{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;padding:56px 0;border-bottom:1px solid var(--line)}
.story:last-child{border-bottom:none}
.story-photo{aspect-ratio:4/5;background:var(--paper-2);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;text-align:center;padding:32px}
.story-photo span{font-family:var(--serif);font-size:22px;color:var(--ink-faint);line-height:1.5}
.story-text h3{font-size:24px;margin-bottom:6px}
.story-meta{font-size:13px;letter-spacing:.1em;color:var(--gold-2);margin-bottom:4px}
.story-out{font-size:14px;color:var(--ink);margin-bottom:22px;font-weight:500}
.story-quote{font-family:var(--serif);font-size:clamp(19px,2vw,24px);line-height:1.65;color:var(--ink-2);border-left:2px solid var(--gold);padding-left:24px;margin-top:8px}

/* ---------- 校友阶梯 ---------- */
.tiers{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line)}
.tier{padding:48px 38px;background:#fff;border-right:1px solid var(--line)}
.tier:last-child{border-right:none}
.tier .lvl{font-family:var(--serif);font-size:20px;color:var(--gold-2);margin-bottom:12px}
.tier h3{font-size:22px;margin-bottom:14px}
.tier p{font-size:14px;line-height:1.85}

/* ---------- CTA 条 ---------- */
.cta-band{background:var(--ink);color:#fff;text-align:center}
.cta-band .eyebrow{color:#d9c39a}
.cta-band h2{color:#fff;margin:16px 0 18px}
.cta-band .lead{color:rgba(255,255,255,.72);margin:0 auto 40px}

/* ---------- 粘性联系栏 ---------- */
.sticky{position:fixed;bottom:0;left:0;right:0;z-index:90;background:rgba(251,250,247,.96);backdrop-filter:blur(12px);border-top:1px solid var(--line);padding:14px 0;transform:translateY(100%);transition:.5s cubic-bezier(.2,.7,.3,1)}
.sticky.show{transform:translateY(0)}
.sticky-in{max-width:var(--max);margin:0 auto;padding:0 32px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.sticky-text{font-size:14px;color:var(--ink-mute)}
.sticky-text strong{color:var(--ink);font-weight:500}
.sticky .btn{padding:11px 26px;font-size:14px}

/* ---------- 页脚 ---------- */
footer{border-top:1px solid var(--line);padding:72px 0 40px;background:var(--paper)}
.foot{max-width:var(--max);margin:0 auto;padding:0 32px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:56px}
.foot .brand{margin-bottom:18px}
.foot p{font-size:14px;max-width:24em}
.foot h4{font-size:13px;letter-spacing:.16em;color:var(--ink);margin-bottom:20px;text-transform:uppercase}
.foot ul{list-style:none}
.foot li{font-size:14px;color:var(--ink-mute);padding:6px 0}
.foot li a:hover{color:var(--gold-2)}
.foot-bot{max-width:var(--max);margin:56px auto 0;padding:28px 32px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;font-size:12.5px;color:var(--ink-faint);flex-wrap:wrap;gap:16px}

/* ---------- 入场动画 ---------- */
.rise{opacity:0;transform:translateY(34px);transition:opacity .9s cubic-bezier(.2,.7,.3,1),transform .9s cubic-bezier(.2,.7,.3,1)}
.rise.in{opacity:1;transform:none}
.rise.d1{transition-delay:.08s}.rise.d2{transition-delay:.16s}.rise.d3{transition-delay:.24s}.rise.d4{transition-delay:.32s}

/* ---------- 响应式 ---------- */
@media(max-width:900px){
  .container{padding:0 22px}
  .grid-4,.grid-3{grid-template-columns:repeat(2,1fr)}
  .grid-2,.split,.split.alt{grid-template-columns:1fr;gap:40px}
  .split-img{aspect-ratio:5/4}
  .track-row{grid-template-columns:1fr;gap:12px;padding:26px 0}
  .track-day{font-size:20px}
  .profile,.story{grid-template-columns:1fr;gap:28px;padding:40px 0}
  .avatar{width:140px;height:140px;font-size:48px}
  .tiers{grid-template-columns:1fr}
  .tier{border-right:none;border-bottom:1px solid var(--line)}
  .nav-links,.nav-cta,.lang{display:none}
  .menu-btn{display:flex}
  .compare th,.compare td{font-size:13px;padding:14px 10px}
  .compare th{font-size:15px}
  .foot{grid-template-columns:1fr 1fr;gap:36px}
  .hero-meta{gap:32px;margin-top:56px}
  .sticky-in{flex-direction:column;align-items:flex-start;gap:10px}
}
@media(max-width:560px){
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
  .foot{grid-template-columns:1fr}
  .hero-meta{gap:24px}
  .hero-meta strong{font-size:24px}
}