/* ============================================================
   棠院 LA VILLA · 官网样式
   风格：南法高定 · 米白 / 香槟金 / 深棕
   ============================================================ */
:root{
  --ivory:#F3EEE4;
  --cream:#FAF7F0;
  --gold:#B08D57;
  --gold-deep:#96733F;
  --gold-light:#D9C29A;
  --ink:#2B241B;
  --brown:#6E5D49;
  --gray:#8A8073;
  --dark:#1D1811;
  --line:rgba(176,141,87,.28);
  --serif:"Cormorant Garamond","Noto Serif SC","Songti SC","SimSun",serif;
  --num:"Jost","Avenir Next","Century Gothic","Helvetica Neue",Arial,sans-serif;
  --shadow:0 18px 50px rgba(43,36,27,.12);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{font-family:"Noto Serif SC","Songti SC","SimSun",serif;color:var(--ink);background:var(--cream);line-height:1.9;font-size:15px;-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}
.container{max-width:1240px;margin:0 auto;padding:0 48px}
.container-narrow{max-width:920px}

/* ---------------- 顶部导航 ---------------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:900;transition:background .4s,box-shadow .4s,padding .4s;padding:18px 0}
.site-header.scrolled{background:rgba(250,247,240,.96);backdrop-filter:blur(10px);box-shadow:0 1px 0 var(--line),0 8px 30px rgba(43,36,27,.06);padding:10px 0}
.header-inner{max-width:1400px;margin:0 auto;padding:0 40px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:baseline;gap:10px;color:#F6F1E6}
.site-header.scrolled .brand{color:var(--ink)}
.brand-logo{font-size:26px;font-weight:700;letter-spacing:10px}
.brand-sub{font-family:var(--serif);font-size:12px;letter-spacing:4px;color:var(--gold-light)}
.site-header.scrolled .brand-sub{color:var(--gold)}
.main-nav{display:flex;gap:34px}
.nav-link{position:relative;font-size:15px;letter-spacing:4px;color:rgba(246,241,230,.85);padding:6px 0;transition:color .3s}
.site-header.scrolled .nav-link{color:var(--brown)}
.nav-link::after{content:"";position:absolute;left:50%;bottom:0;width:0;height:1px;background:var(--gold);transition:all .35s;transform:translateX(-50%)}
.nav-link:hover::after,.nav-link.active::after{width:100%}
.nav-link:hover,.nav-link.active{color:var(--gold-light)}
.site-header.scrolled .nav-link:hover,.site-header.scrolled .nav-link.active{color:var(--gold-deep)}
.header-contact{display:flex;align-items:center;gap:16px}
.vip-line{display:flex;align-items:center;gap:8px;color:#F6F1E6;font-family:var(--num);font-size:17px;font-weight:400;letter-spacing:1.5px;transition:color .3s}
.site-header.scrolled .vip-line{color:var(--ink)}
.vip-line:hover{color:var(--gold-light)}
.site-header.scrolled .vip-line:hover{color:var(--gold-deep)}
.btn-appointment{border:1px solid var(--gold);color:var(--gold-light);font-size:13px;letter-spacing:3px;padding:8px 20px;transition:all .35s}
.site-header.scrolled .btn-appointment{color:var(--gold-deep)}
.btn-appointment:hover{background:var(--gold);color:#fff}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:6px}
.nav-toggle span{width:22px;height:1.5px;background:currentColor;color:#F6F1E6;transition:.3s}
.site-header.scrolled .nav-toggle span{color:var(--ink)}

/* ---------------- HERO ---------------- */
.hero{position:relative;height:100vh;min-height:640px;display:flex;align-items:center;justify-content:center;text-align:center;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.06);animation:heroZoom 9s ease-out forwards}
@keyframes heroZoom{to{transform:scale(1)}}
.hero-mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,16,10,.55) 0%,rgba(20,16,10,.28) 45%,rgba(20,16,10,.62) 100%)}
.hero-content{position:relative;z-index:2;color:#F6F1E6;padding:0 24px}
.hero-kicker{font-size:14px;letter-spacing:6px;color:var(--gold-light);margin-bottom:22px}
.hero-title{font-size:min(96px,14vw);font-weight:700;letter-spacing:26px;line-height:1.15;text-indent:26px}
.hero-title-en{display:block;font-family:var(--serif);font-size:min(26px,4vw);font-weight:500;letter-spacing:16px;text-indent:16px;color:var(--gold-light);margin-top:6px}
.hero-slogan{margin-top:26px;font-size:min(21px,3.4vw);letter-spacing:8px}
.hero-divider{display:flex;align-items:center;justify-content:center;gap:12px;margin:26px auto}
.hero-divider i{width:70px;height:1px;background:linear-gradient(90deg,transparent,var(--gold));display:block}
.hero-divider i:last-child{background:linear-gradient(90deg,var(--gold),transparent)}
.hero-divider em{width:7px;height:7px;background:var(--gold);transform:rotate(45deg);display:block}
.hero-desc{font-size:14px;letter-spacing:3px;color:rgba(246,241,230,.82);line-height:2.2}
.btn-gold{display:inline-block;margin-top:36px;padding:13px 46px;border:1px solid var(--gold);color:var(--gold-light);letter-spacing:6px;font-size:14px;transition:all .4s;background:rgba(176,141,87,.08)}
.btn-gold:hover{background:var(--gold);color:#fff;letter-spacing:8px}
.hero-scroll{position:absolute;bottom:34px;left:50%;transform:translateX(-50%);z-index:2;color:rgba(246,241,230,.7);font-size:11px;letter-spacing:4px;text-align:center}
.hero-scroll span{display:block;width:1px;height:44px;margin:0 auto 10px;background:linear-gradient(180deg,var(--gold),transparent);animation:scrollLine 1.8s ease-in-out infinite}
@keyframes scrollLine{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ---------------- 通用 Section ---------------- */
.section{padding:110px 0}
.section-cream{background:var(--cream)}
.section-ivory{background:var(--ivory)}
.section-dark{background:var(--dark);color:#EDE6D8}
.sec-head{text-align:center;margin-bottom:64px}
.sec-en{font-family:var(--serif);font-size:13px;letter-spacing:6px;color:var(--gold);margin-bottom:14px}
.sec-title{font-size:36px;font-weight:600;letter-spacing:8px}
.section-dark .sec-title{color:#F2EADA}
.sec-desc{margin-top:18px;font-size:14px;letter-spacing:2px;color:var(--gray);line-height:2.2}
.section-dark .sec-desc{color:rgba(237,230,216,.66)}
.img-note{text-align:center;font-size:12px;color:var(--gray);letter-spacing:1px;margin-top:12px}

/* 入场动画 */
.reveal{opacity:0;transform:translateY(36px);transition:opacity .9s ease,transform .9s ease}
.reveal.in{opacity:1;transform:none}

/* ---------------- 品牌 ---------------- */
.brand-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.brand-card{background:#fff;border:1px solid var(--line);padding:52px 46px;position:relative;transition:box-shadow .4s,transform .4s}
.brand-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.brand-card::before{content:"";position:absolute;top:0;left:0;width:44px;height:2px;background:var(--gold)}
.brand-card-no{font-family:var(--serif);font-size:15px;color:var(--gold);letter-spacing:4px;margin-bottom:14px}
.brand-card h3{font-size:24px;letter-spacing:4px;margin-bottom:6px}
.brand-card-tag{font-size:13px;color:var(--gold-deep);letter-spacing:3px;margin-bottom:18px}
.brand-card-text{font-size:14px;color:var(--brown);line-height:2.1;text-align:justify}

/* ---------------- 项目 ---------------- */
.stat-grid{list-style:none;display:grid;grid-template-columns:repeat(6,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-bottom:60px}
.stat-grid li{background:var(--ivory);padding:34px 10px;text-align:center;transition:background .4s}
.stat-grid li:hover{background:#fff}
.stat-grid strong{display:block;font-family:var(--num);font-size:34px;font-weight:400;color:var(--gold-deep);letter-spacing:1px}
.stat-grid strong small{font-size:16px;margin-left:3px;font-weight:300}
.stat-grid span{font-size:12px;letter-spacing:2px;color:var(--gray)}
.project-map{border:1px solid var(--line);padding:14px;background:#fff;box-shadow:var(--shadow)}
.addr-bar{margin-top:44px;display:flex;align-items:center;justify-content:center;gap:12px;color:var(--brown);font-size:15px;letter-spacing:2px}
.addr-bar svg{color:var(--gold);flex:none}

/* ---------------- 户型 ---------------- */
.plan-tabs{display:flex;justify-content:center;gap:20px;margin-bottom:52px;flex-wrap:wrap}
.plan-tab{padding:14px 34px;border:1px solid rgba(217,194,154,.35);color:rgba(237,230,216,.72);font-size:15px;letter-spacing:2px;transition:all .35s}
.plan-tab.active,.plan-tab:hover{border-color:var(--gold);color:var(--gold-light);background:rgba(176,141,87,.12)}
.plan-panel{display:none;grid-template-columns:1fr 1.1fr;gap:56px;align-items:start}
.plan-panel.active{display:grid}
.plan-info h3{font-size:30px;letter-spacing:6px;color:#F2EADA;margin-bottom:28px}
.plan-info h3 small{display:block;font-family:var(--serif);font-size:14px;letter-spacing:3px;color:var(--gold-light);margin-top:8px;font-weight:400}
.plan-info ul{list-style:none}
.plan-info li{padding:20px 0;border-bottom:1px solid rgba(217,194,154,.16);font-size:13.5px;color:rgba(237,230,216,.72);line-height:2}
.plan-info li em{display:block;font-style:normal;font-size:16px;color:var(--gold-light);letter-spacing:3px;margin-bottom:6px}
.plan-img{background:#F6F1E6;padding:12px;box-shadow:0 24px 60px rgba(0,0,0,.4)}
.plan-img img{cursor:zoom-in}
.plan-note{text-align:center;margin-top:36px;font-size:12px;letter-spacing:2px;color:rgba(237,230,216,.45)}

/* ---------------- 园境 ---------------- */
.sys-list{margin-bottom:32px}
.sys-item{display:grid;grid-template-columns:1fr 1.25fr;gap:56px;align-items:center;padding:34px 0}
.sys-reverse{grid-template-columns:1.25fr 1fr}
.sys-reverse .sys-text{order:2}
.sys-reverse .sys-img{order:1}
.sys-no{font-family:var(--serif);font-size:44px;color:var(--gold-light);line-height:1;margin-bottom:14px}
.sys-text h3{font-size:26px;letter-spacing:5px;margin-bottom:6px}
.sys-tag{font-size:13px;color:var(--gold-deep);letter-spacing:3px;margin-bottom:16px}
.sys-text p:last-child{font-size:14px;color:var(--brown);text-align:justify}
.sys-img{overflow:hidden}
.sys-img img{width:100%;transition:transform 1.2s ease}
.sys-img:hover img{transform:scale(1.045)}
.sys-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin:40px 0 70px}
.sys-card{background:#fff;border:1px solid var(--line);padding:40px 34px;transition:box-shadow .4s,transform .4s}
.sys-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.sys-card .sys-no{font-size:30px;margin-bottom:10px}
.sys-card h3{font-size:19px;letter-spacing:3px;margin-bottom:4px}
.sys-card .sys-tag{margin-bottom:12px}
.sys-card p:last-child{font-size:13px;color:var(--brown);line-height:2;text-align:justify}
.life-banner{max-width:860px;margin:0 auto;background:#fff;border:1px solid var(--line);padding:16px;box-shadow:var(--shadow)}
.life-banner img{cursor:zoom-in}

/* ---------------- 配套 ---------------- */
.fac-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-bottom:64px}
.fac-card{background:var(--cream);border:1px solid var(--line);padding:36px 32px;transition:all .4s}
.fac-card:hover{background:#fff;box-shadow:var(--shadow);transform:translateY(-4px)}
.fac-card i{font-style:normal;color:var(--gold);font-size:15px}
.fac-card h3{font-size:19px;letter-spacing:4px;margin:10px 0 12px}
.fac-card h3::after{content:"";display:block;width:30px;height:1px;background:var(--gold);margin-top:10px}
.fac-card p{font-size:13px;color:var(--brown);line-height:2.05}
.fac-imgs{display:grid;gap:36px}
.fac-imgs figure{border:1px solid var(--line);padding:12px;background:#fff;box-shadow:var(--shadow)}
.fac-imgs img{cursor:zoom-in;width:100%}

/* ---------------- 问答 ---------------- */
.faq-item{border:1px solid var(--line);background:#fff;margin-bottom:14px;transition:box-shadow .3s}
.faq-item:hover{box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;text-align:left;padding:22px 28px;font-size:15.5px;letter-spacing:1.5px;color:var(--ink)}
.faq-q .faq-arrow{font-family:var(--serif);color:var(--gold);font-size:20px;transition:transform .35s;flex:none}
.faq-item.open .faq-arrow{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .45s ease}
.faq-a-inner{padding:0 28px 24px;font-size:13.5px;color:var(--brown);line-height:2.05;border-top:1px dashed var(--line);padding-top:18px;margin:0 28px 24px;padding-left:0;padding-right:0}

/* ---------------- 页脚 ---------------- */
.site-footer{background:var(--dark);color:#EDE6D8;padding:76px 0 0}
.footer-inner{display:grid;grid-template-columns:1.4fr 1fr auto;gap:56px;align-items:center;padding-bottom:56px;border-bottom:1px solid rgba(217,194,154,.16)}
.footer-logo{font-size:30px;letter-spacing:8px;font-weight:600}
.footer-logo span{font-family:var(--serif);font-size:14px;letter-spacing:5px;color:var(--gold-light);margin-left:8px}
.footer-slogan{margin-top:12px;font-size:13px;letter-spacing:3px;color:var(--gold-light)}
.footer-addr{margin-top:10px;font-size:12.5px;color:rgba(237,230,216,.6);letter-spacing:1px}
.footer-contact-label{font-size:12px;letter-spacing:4px;color:var(--gold);margin-bottom:8px}
.footer-phone{font-family:var(--num);font-size:30px;font-weight:400;letter-spacing:2px;color:#F2EADA}
.footer-tip{font-size:12px;color:rgba(237,230,216,.55);margin-top:8px;letter-spacing:1px}
.footer-qr img{width:250px;border:1px solid rgba(217,194,154,.3)}
.footer-copy{padding:24px 48px 30px;text-align:center}
.footer-copy p{font-size:11px;color:rgba(237,230,216,.38);letter-spacing:1px;line-height:1.9;max-width:1000px;margin:0 auto}

/* ---------------- 弹层 ---------------- */
.modal,.lightbox{position:fixed;inset:0;z-index:1000;display:none;align-items:center;justify-content:center}
.modal.open,.lightbox.open{display:flex}
.modal-mask,.lightbox-mask{position:absolute;inset:0;background:rgba(20,16,10,.72);backdrop-filter:blur(4px)}
.modal-box{position:relative;background:var(--cream);padding:44px 40px 36px;width:min(420px,90vw);text-align:center;box-shadow:0 30px 80px rgba(0,0,0,.4);animation:pop .35s ease}
@keyframes pop{from{opacity:0;transform:translateY(20px) scale(.97)}to{opacity:1;transform:none}}
.modal-title{font-size:18px;letter-spacing:4px;margin-bottom:22px;color:var(--ink)}
.modal-qr{width:100%;border:1px solid var(--line)}
.modal-phone{margin-top:20px;font-size:15px;letter-spacing:2px;color:var(--brown)}
.modal-phone a{font-family:var(--num);font-size:22px;color:var(--gold-deep);letter-spacing:1px}
.modal-tip{font-size:12px;color:var(--gray);margin-top:8px;letter-spacing:1px}
.modal-close{position:absolute;top:10px;right:14px;font-size:26px;color:var(--gray);line-height:1;transition:color .3s;z-index:5}
.modal-close:hover{color:var(--gold-deep)}
.lightbox img{position:relative;max-width:92vw;max-height:88vh;box-shadow:0 30px 80px rgba(0,0,0,.5)}
.lightbox .modal-close{color:#EDE6D8;font-size:34px}

/* ---------------- AI 问答浮窗 ---------------- */
.ai-widget{position:fixed;right:28px;bottom:28px;z-index:950}
.ai-fab{display:flex;align-items:center;gap:9px;background:linear-gradient(135deg,var(--gold) 0%,var(--gold-deep) 100%);color:#fff;padding:14px 22px;border-radius:999px;box-shadow:0 12px 34px rgba(150,115,63,.45);transition:transform .3s,box-shadow .3s;font-size:14px;letter-spacing:2px}
.ai-fab:hover{transform:translateY(-3px);box-shadow:0 18px 44px rgba(150,115,63,.55)}
.ai-panel{position:absolute;right:0;bottom:72px;width:380px;max-width:calc(100vw - 32px);height:min(560px,calc(100vh - 130px));background:var(--cream);border:1px solid var(--line);box-shadow:0 26px 70px rgba(43,36,27,.3);display:none;flex-direction:column;overflow:hidden}
.ai-panel.open{display:flex;animation:pop .3s ease}
.ai-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;background:var(--dark);color:#EDE6D8;flex:none}
.ai-head-title{font-size:15px;letter-spacing:2px}
.ai-head-sub{font-size:11px;color:rgba(237,230,216,.6);display:flex;align-items:center;gap:6px;margin-top:2px}
.ai-dot{width:7px;height:7px;border-radius:50%;background:#8FCF9B;display:inline-block}
.ai-close{color:rgba(237,230,216,.7);font-size:18px;padding:2px 8px}
.ai-close:hover{color:#fff}
.ai-body{flex:1;overflow-y:auto;padding:18px 16px;display:flex;flex-direction:column;gap:12px;background:linear-gradient(180deg,var(--ivory),var(--cream))}
.ai-msg{max-width:82%;padding:11px 15px;font-size:13.5px;line-height:1.9;word-break:break-word;animation:pop .25s ease}
.ai-msg.bot{align-self:flex-start;background:#fff;border:1px solid var(--line);border-radius:2px 14px 14px 14px;color:var(--ink)}
.ai-msg.user{align-self:flex-end;background:linear-gradient(135deg,var(--gold),var(--gold-deep));color:#fff;border-radius:14px 2px 14px 14px}
.ai-msg.bot a{color:var(--gold-deep);text-decoration:underline}
.ai-quick{display:flex;gap:8px;padding:10px 14px;overflow-x:auto;flex:none;border-top:1px solid var(--line);background:var(--cream)}
.ai-quick::-webkit-scrollbar{display:none}
.ai-chip{flex:none;font-size:12px;letter-spacing:1px;color:var(--gold-deep);border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 14px;transition:all .3s;white-space:nowrap}
.ai-chip:hover{background:var(--gold);color:#fff;border-color:var(--gold)}
.ai-input{display:flex;gap:10px;padding:12px 14px;border-top:1px solid var(--line);background:#fff;flex:none}
.ai-input input{flex:1;border:1px solid var(--line);background:var(--cream);padding:10px 14px;font-size:13.5px;font-family:inherit;outline:none;border-radius:2px}
.ai-input input:focus{border-color:var(--gold)}
.ai-input button{width:42px;height:42px;background:linear-gradient(135deg,var(--gold),var(--gold-deep));color:#fff;display:flex;align-items:center;justify-content:center;border-radius:2px;transition:opacity .3s;flex:none}
.ai-input button:hover{opacity:.88}

/* ---------------- 响应式 ---------------- */
@media (max-width:1080px){
  .container{padding:0 32px}
  .brand-grid,.plan-panel,.sys-item,.sys-reverse{grid-template-columns:1fr}
  .sys-reverse .sys-text{order:1}
  .sys-reverse .sys-img{order:2}
  .stat-grid{grid-template-columns:repeat(3,1fr)}
  .sys-cards,.fac-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr;gap:32px;text-align:center}
  .footer-qr img{margin:0 auto}
  .plan-panel{gap:36px}
}
@media (max-width:768px){
  html{scroll-padding-top:64px}
  .section{padding:76px 0}
  .container{padding:0 20px}
  .header-inner{padding:0 20px}
  .brand-logo{font-size:21px;letter-spacing:6px}
  .brand-sub{display:none}
  .main-nav{position:fixed;top:0;right:-100%;width:min(320px,80vw);height:100vh;background:var(--dark);flex-direction:column;gap:0;padding:90px 40px 40px;transition:right .4s ease;z-index:899}
  .main-nav.open{right:0}
  .main-nav .nav-link{color:rgba(246,241,230,.85);font-size:17px;padding:16px 0;border-bottom:1px solid rgba(217,194,154,.15);width:100%}
  .nav-toggle{display:flex;position:relative;z-index:900}
  .vip-num{display:none}
  .btn-appointment{padding:7px 14px;font-size:12px;letter-spacing:2px}
  .hero-title{letter-spacing:14px;text-indent:14px}
  .sec-title{font-size:26px;letter-spacing:4px}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .sys-cards,.fac-grid{grid-template-columns:1fr}
  .addr-bar{flex-direction:column;text-align:center;font-size:13.5px;gap:6px}
  .ai-widget{right:16px;bottom:16px}
  .ai-panel{position:fixed;right:12px;left:12px;bottom:86px;width:auto;height:min(520px,calc(100vh - 140px))}
  .footer-copy{padding:20px 20px 26px}
}