/* ============================================================
   China Tour Story — 样式表
   ============================================================ */

:root{
  --ink:#16211D;
  --ink-soft:#54605A;
  --ink-mute:#8A938D;
  --sand:#FBF6ED;
  --sand-2:#F3EADC;
  --paper:#FFFFFF;
  --red:#B23A2A;
  --red-dark:#8B2A1D;
  --gold:#C08A2E;
  --line:rgba(22,33,29,.12);
  --shadow:0 18px 50px -24px rgba(22,33,29,.35);
  --serif:'Playfair Display','Noto Serif SC',Georgia,serif;
  --sans:'Inter','Helvetica Neue',-apple-system,'PingFang SC',sans-serif;
  --maxw:1200px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--sand);
  color:var(--ink);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  font-size:16px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}

/* ---------- 顶部导航 ---------- */
.header{
  position:sticky;top:0;z-index:100;
  background:rgba(251,246,237,.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:.3s;
}
.header.scrolled{border-bottom-color:var(--line);box-shadow:0 6px 30px -24px rgba(0,0,0,.4)}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px}
.logo{display:flex;align-items:center;gap:11px;font-family:var(--serif);font-size:21px;letter-spacing:.2px}
.logo .mark{
  width:38px;height:38px;border-radius:11px;flex:0 0 38px;
  background:linear-gradient(140deg,var(--red),var(--red-dark));
  color:#fff;display:grid;place-items:center;font-size:15px;font-family:var(--serif);
  letter-spacing:0;box-shadow:0 6px 16px -8px rgba(139,42,29,.9)
}
.logo b{font-weight:600}
.logo span{color:var(--ink-mute);font-family:var(--sans);font-size:10px;letter-spacing:.22em;text-transform:uppercase;display:block;line-height:1;margin-top:3px}

.menu{display:flex;align-items:center;gap:34px}
.menu a{font-size:13.5px;letter-spacing:.04em;color:var(--ink-soft);position:relative;padding:6px 0}
.menu a::after{content:'';position:absolute;left:0;bottom:0;height:1.5px;width:0;background:var(--red);transition:.28s}
.menu a:hover,.menu a.active{color:var(--ink)}
.menu a:hover::after,.menu a.active::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-phone{font-size:13px;color:var(--ink-soft);letter-spacing:.02em}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 24px;border-radius:999px;font-size:13.5px;font-weight:500;
  letter-spacing:.03em;transition:.25s;white-space:nowrap;
}
.btn-primary{background:var(--red);color:#fff;box-shadow:0 12px 26px -14px rgba(178,58,42,.95)}
.btn-primary:hover{background:var(--red-dark);transform:translateY(-1px)}
.btn-ghost{border:1px solid rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.btn-outline{border:1px solid var(--line);color:var(--ink);background:transparent}
.btn-outline:hover{border-color:var(--ink);background:#fff}

.burger{display:none;width:40px;height:40px;place-items:center}
.burger span{display:block;width:20px;height:1.5px;background:var(--ink);margin:4px 0;transition:.25s}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:640px;display:flex;align-items:flex-end;overflow:hidden;color:#fff}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center 42%;transform:scale(1.02)}
.hero::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(12,18,16,.55) 0%,rgba(12,18,16,.18) 38%,rgba(12,18,16,.82) 100%);
}
.hero-inner{position:relative;z-index:2;width:100%;padding:120px 0 54px}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:11px;letter-spacing:.24em;
  text-transform:uppercase;color:rgba(255,255,255,.86);margin-bottom:22px;
}
.eyebrow::before{content:'';width:34px;height:1px;background:currentColor;opacity:.7}
.hero h1{
  font-family:var(--serif);font-weight:400;font-size:clamp(38px,6vw,72px);
  line-height:1.06;letter-spacing:-.01em;max-width:16em;text-wrap:balance;
}
.hero h1 em{font-style:italic;color:#F2D6A8}
.hero p.lead{max-width:540px;margin-top:22px;font-size:16.5px;color:rgba(255,255,255,.86);line-height:1.7}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap}

/* 搜索条 */
.searchbar{
  position:relative;z-index:3;margin-top:52px;background:rgba(255,255,255,.97);
  border-radius:16px;padding:10px;display:grid;grid-template-columns:1.4fr 1fr 1fr auto;
  gap:2px;box-shadow:0 30px 60px -30px rgba(0,0,0,.6);color:var(--ink);
}
.sb-field{padding:12px 18px;border-right:1px solid var(--line)}
.sb-field:last-of-type{border-right:none}
.sb-field label{display:block;font-size:9.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:4px}
.sb-field select,.sb-field input{
  border:none;outline:none;background:transparent;font-family:inherit;font-size:14.5px;
  color:var(--ink);width:100%;appearance:none;
}
.sb-field select{cursor:pointer}
.searchbar .btn{height:100%;padding:16px 28px}

/* ---------- 通用区块 ---------- */
section{padding:96px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:46px;flex-wrap:wrap}
.sec-head .left{max-width:620px}
.kicker{
  font-size:10.5px;letter-spacing:.26em;text-transform:uppercase;color:var(--red);
  display:flex;align-items:center;gap:10px;margin-bottom:14px;font-weight:500;
}
.kicker::before{content:'';width:26px;height:1px;background:var(--red)}
h2.sec-title{font-family:var(--serif);font-weight:400;font-size:clamp(28px,3.6vw,44px);line-height:1.14;letter-spacing:-.01em}
.sec-sub{color:var(--ink-soft);margin-top:14px;font-size:15.5px;max-width:56ch}

/* 数据条 */
.stats{background:var(--ink);color:#fff;padding:0}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0;padding-top:0;padding-bottom:0}
.stat{padding:38px 22px;border-right:1px solid rgba(255,255,255,.1)}
.stat:last-child{border-right:none}
.stat b{display:block;font-family:var(--serif);font-size:36px;font-weight:400;line-height:1;color:#F2D6A8}
.stat span{font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:rgba(255,255,255,.6);margin-top:9px;display:block}

/* 目的地卡片 */
.grid-dest{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card-dest{
  position:relative;border-radius:16px;overflow:hidden;min-height:330px;
  display:flex;flex-direction:column;justify-content:flex-end;
  padding:26px;color:#fff;isolation:isolate;transition:.4s cubic-bezier(.2,.7,.3,1);
  box-shadow:0 14px 40px -26px rgba(22,33,29,.6);
}
.card-dest:hover{transform:translateY(-5px);box-shadow:0 26px 60px -28px rgba(22,33,29,.55)}
.card-dest .glyph{
  position:absolute;right:-6px;top:-34px;font-family:var(--serif);font-size:190px;
  line-height:1;color:rgba(255,255,255,.1);z-index:0;pointer-events:none;user-select:none;
}
.card-dest::after{
  content:'';position:absolute;inset:0;z-index:-1;
  background:linear-gradient(175deg,rgba(0,0,0,.06) 0%,rgba(0,0,0,.42) 100%);
}
.card-dest .tag{
  position:absolute;top:20px;left:20px;font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;
  padding:6px 11px;border-radius:999px;background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.3);backdrop-filter:blur(6px);
}
.card-dest h3{font-family:var(--serif);font-weight:400;font-size:25px;line-height:1.2;position:relative}
.card-dest h3 .zh{font-size:13px;opacity:.72;margin-left:8px;font-family:var(--sans);letter-spacing:.1em}
.card-dest p{font-size:13.5px;color:rgba(255,255,255,.82);margin-top:7px;position:relative}
.card-meta{
  display:flex;gap:16px;margin-top:16px;padding-top:14px;border-top:1px solid rgba(255,255,255,.22);
  font-size:11.5px;letter-spacing:.05em;color:rgba(255,255,255,.9);position:relative;
}
.card-meta span{display:flex;align-items:center;gap:6px}
.card-dest .arrow{
  position:absolute;right:22px;bottom:24px;width:34px;height:34px;border-radius:50%;
  border:1px solid rgba(255,255,255,.45);display:grid;place-items:center;font-size:14px;
  transition:.3s;opacity:0;transform:translateX(-6px);
}
.card-dest:hover .arrow{opacity:1;transform:translateX(0);background:rgba(255,255,255,.18)}

/* 筛选 */
.filters{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:38px}
.chip{
  padding:9px 18px;border-radius:999px;font-size:12.5px;letter-spacing:.04em;
  border:1px solid var(--line);color:var(--ink-soft);transition:.22s;background:transparent;
}
.chip:hover{border-color:var(--ink-mute);color:var(--ink)}
.chip.active{background:var(--ink);border-color:var(--ink);color:#fff}

/* 线路列表 */
.routes{display:grid;gap:18px}
.route{
  background:var(--paper);border:1px solid var(--line);border-radius:16px;
  padding:0;overflow:hidden;transition:.3s;
}
.route:hover{border-color:rgba(22,33,29,.24);box-shadow:var(--shadow)}
.route-top{display:grid;grid-template-columns:96px 1fr auto;gap:26px;align-items:center;padding:28px 30px;cursor:pointer}
.route-days{
  text-align:center;border-right:1px solid var(--line);padding-right:22px;
}
.route-days b{font-family:var(--serif);font-size:38px;font-weight:400;display:block;line-height:1}
.route-days span{font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute)}
.route h3{font-family:var(--serif);font-size:23px;font-weight:400;line-height:1.25}
.route .cities{font-size:12px;letter-spacing:.06em;color:var(--ink-mute);margin-top:6px;text-transform:uppercase}
.route .summary{font-size:14px;color:var(--ink-soft);margin-top:9px;max-width:62ch}
.route-right{text-align:right;display:flex;flex-direction:column;align-items:flex-end;gap:10px}
.price{font-family:var(--serif);font-size:24px;line-height:1}
.price small{font-family:var(--sans);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-mute);display:block;margin-top:5px}
.route-toggle{
  display:inline-flex;align-items:center;gap:7px;font-size:12px;letter-spacing:.06em;
  color:var(--red);padding:7px 0;
}
.route-toggle .caret{transition:.3s;display:inline-block}
.route.open .route-toggle .caret{transform:rotate(180deg)}
.route-body{max-height:0;overflow:hidden;transition:max-height .45s ease;border-top:0 solid var(--line)}
.route.open .route-body{border-top:1px solid var(--line)}
.route-body-inner{padding:26px 30px 30px;display:grid;grid-template-columns:1.5fr 1fr;gap:36px;background:#FDFBF6}
.route-body h4{font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--red);margin-bottom:14px;font-weight:600}
.itin{list-style:none;display:grid;gap:11px}
.itin li{font-size:14px;color:var(--ink-soft);padding-left:20px;position:relative;line-height:1.55}
.itin li::before{content:'';position:absolute;left:0;top:8px;width:6px;height:6px;border-radius:50%;background:var(--gold)}
.facts{display:grid;gap:12px;font-size:13.5px;color:var(--ink-soft)}
.facts div{display:flex;justify-content:space-between;gap:14px;padding-bottom:10px;border-bottom:1px dashed var(--line)}
.facts b{color:var(--ink);font-weight:500}

/* 特色 */
.why{background:var(--sand-2)}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.why-card{background:rgba(255,255,255,.7);border:1px solid rgba(255,255,255,.9);border-radius:16px;padding:32px 28px}
.why-card .num{font-family:var(--serif);font-size:13px;color:var(--gold);letter-spacing:.1em}
.why-card h3{font-family:var(--serif);font-size:20px;font-weight:400;margin:14px 0 10px}
.why-card p{font-size:14px;color:var(--ink-soft)}

/* 故事 / 引言 */
.story-block{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.quote{font-family:var(--serif);font-size:clamp(22px,2.6vw,30px);line-height:1.45;color:var(--ink);font-style:italic}
.quote::before{content:'“';font-size:60px;color:var(--red);line-height:0;vertical-align:-18px;margin-right:4px}
.attrib{margin-top:24px;font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-mute)}
.img-frame{border-radius:18px;overflow:hidden;box-shadow:var(--shadow);position:relative;aspect-ratio:4/3;background:linear-gradient(160deg,#C9B79A,#8A7A63)}
.img-frame img{width:100%;height:100%;object-fit:cover}

/* CTA */
.cta-band{
  background:var(--ink);color:#fff;border-radius:20px;padding:64px;
  display:grid;grid-template-columns:1.3fr .7fr;gap:40px;align-items:center;
  position:relative;overflow:hidden;
}
.cta-band::before{
  content:'';position:absolute;right:-80px;top:-80px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(178,58,42,.55),transparent 68%);
}
.cta-band h2{font-family:var(--serif);font-weight:400;font-size:clamp(26px,3.2vw,40px);line-height:1.2;position:relative}
.cta-band p{color:rgba(255,255,255,.72);margin-top:14px;font-size:15px;position:relative}
.cta-band .actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end;position:relative}

/* 页脚 */
.footer{background:#0F1714;color:rgba(255,255,255,.68);padding:72px 0 30px;font-size:13.5px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:44px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer .logo{color:#fff;margin-bottom:16px}
.footer p{line-height:1.8;max-width:34ch}
.foot-col h4{font-size:10.5px;letter-spacing:.22em;text-transform:uppercase;color:rgba(255,255,255,.45);margin-bottom:18px;font-weight:500}
.foot-col a{display:block;padding:6px 0;transition:.2s}
.foot-col a:hover{color:#F2D6A8}
.foot-bottom{display:flex;justify-content:space-between;gap:20px;padding-top:26px;font-size:12px;color:rgba(255,255,255,.4);flex-wrap:wrap}

/* 子页面头部 */
.page-head{padding:150px 0 64px;background:var(--sand-2);border-bottom:1px solid var(--line)}
.page-head .kicker{margin-bottom:18px}
.page-head h1{font-family:var(--serif);font-weight:400;font-size:clamp(34px,5vw,58px);line-height:1.1;letter-spacing:-.015em}
.page-head p{max-width:60ch;color:var(--ink-soft);margin-top:18px;font-size:16px}

/* 详情页（目的地） */
.dest-hero{display:grid;grid-template-columns:1fr 1fr;gap:0;border-radius:18px;overflow:hidden;box-shadow:var(--shadow);margin-bottom:60px}
.dest-hero .visual{min-height:380px;display:grid;place-items:center;color:rgba(255,255,255,.9);position:relative}
.dest-hero .visual .big{font-family:var(--serif);font-size:190px;line-height:1;opacity:.9}
.dest-hero .body{padding:48px;background:#fff}
.dest-hero h1{font-family:var(--serif);font-weight:400;font-size:44px;line-height:1.1}
.dest-hero .zh{color:var(--ink-mute);letter-spacing:.3em;margin-bottom:10px;font-size:13px}
.dest-hero p{color:var(--ink-soft);margin-top:20px;font-size:15.5px}
.dest-hero .facts{margin-top:28px}
.two-col{display:grid;grid-template-columns:1.4fr 1fr;gap:64px}

/* 表单 */
.form-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:34px}
.field{margin-bottom:16px}
.field label{display:block;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border:1px solid var(--line);border-radius:10px;
  font-family:inherit;font-size:14.5px;background:#FDFBF6;color:var(--ink);outline:none;transition:.2s;
}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--red);background:#fff}
.field textarea{resize:vertical;min-height:110px}

/* 入场动画 */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* 响应式 */
@media(max-width:1024px){
  .grid-dest{grid-template-columns:repeat(2,1fr)}
  .why-grid{grid-template-columns:1fr 1fr}
  .foot-grid{grid-template-columns:1fr 1fr}
  .story-block,.two-col,.dest-hero{grid-template-columns:1fr;gap:36px}
  .cta-band{grid-template-columns:1fr;padding:44px}
  .cta-band .actions{justify-content:flex-start}
  .searchbar{grid-template-columns:1fr 1fr;}
  .searchbar .btn{grid-column:span 2;margin-top:4px}
}
@media(max-width:760px){
  .wrap{padding:0 20px}
  .menu{display:none}
  .nav-cta .btn,.nav-phone{display:none}
  .burger{display:grid}
  .menu.open{
    display:flex;flex-direction:column;position:absolute;top:76px;left:0;right:0;
    background:var(--sand);padding:22px 20px 30px;gap:18px;border-bottom:1px solid var(--line);
    box-shadow:0 24px 40px -30px rgba(0,0,0,.4);
  }
  section{padding:64px 0}
  .hero{min-height:600px}
  .hero-inner{padding:80px 0 40px}
  .stats .wrap{grid-template-columns:1fr 1fr}
  .stat:nth-child(2){border-right:none}
  .stat{border-bottom:1px solid rgba(255,255,255,.1)}
  .grid-dest,.why-grid{grid-template-columns:1fr}
  .route-top{grid-template-columns:1fr;gap:16px;padding:22px}
  .route-days{text-align:left;border-right:none;padding-right:0;display:flex;align-items:baseline;gap:8px}
  .route-right{flex-direction:row;align-items:center;justify-content:space-between;width:100%;text-align:left}
  .route-body-inner{grid-template-columns:1fr;gap:24px;padding:22px}
  .page-head{padding:120px 0 44px}
  .dest-hero .body{padding:30px}
  .dest-hero .visual{min-height:220px}
  .dest-hero .visual .big{font-size:120px}
  .cta-band{padding:32px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:30px}
}

/* ---------- 悬浮 WhatsApp 按钮 ---------- */
.wa-float{
  position:fixed;
  right:22px;
  bottom:22px;
  z-index:120;
  width:54px;
  height:54px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:50%;
  background:#25D366;
  color:#fff;
  box-shadow:0 10px 26px -8px rgba(37,211,102,.7),0 2px 8px rgba(22,33,29,.18);
  transition:transform .22s ease,box-shadow .22s ease;
}
.wa-float:hover{transform:translateY(-3px) scale(1.04);box-shadow:0 14px 30px -8px rgba(37,211,102,.8)}
.wa-float svg{display:block}
@media (max-width:600px){
  .wa-float{right:16px;bottom:16px;width:48px;height:48px}
}