/* AI生成 */
/* ===== Global Reset & Base ===== */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'Lora',Georgia,'Songti SC','SimSun',serif;background:#0f1a14;color:#e8e6dc;overflow-x:hidden;line-height:1.7}
h1,h2,h3,h4,h5,h6{font-family:'Outfit','PingFang SC','Microsoft YaHei',sans-serif;font-weight:700;letter-spacing:-0.02em;line-height:1.2}
a{color:inherit;text-decoration:none;transition:color .3s ease}
img{max-width:100%;display:block}
ul,ol{list-style:none}

/* ===== Color Variables ===== */
:root{
  --bg-dark:#0f1a14;--bg-card:#1a2a20;--bg-light:#f7f5f0;
  --green-deep:#1a3a2e;--green-mid:#3d8b6e;--green-light:#5db98f;
  --gold:#d4a843;--gold-light:#e8c97a;
  --text-primary:#e8e6dc;--text-secondary:#b0aea5;--text-muted:#7a7870;
  --border-subtle:rgba(232,230,220,0.1);--border-card:rgba(232,230,220,0.08);
}

/* ===== Layout Helpers ===== */
.container{max-width:1400px;margin:0 auto;padding:0 24px}
.section{padding:100px 0;position:relative}
.section-label{font-family:'Outfit',sans-serif;font-size:14px;font-weight:600;letter-spacing:3px;text-transform:uppercase;color:var(--gold);margin-bottom:16px;display:block}
.section-title{font-size:clamp(2rem,5vw,3.5rem);color:var(--text-primary);margin-bottom:20px}
.section-desc{font-size:1.1rem;color:var(--text-secondary);max-width:65ch;margin-bottom:60px}

/* ===== Navigation ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:1000;transition:all .4s cubic-bezier(0.16,1,0.3,1)}
.nav-inner{max-width:1400px;margin:0 auto;padding:18px 24px;display:flex;align-items:center;justify-content:space-between}
.nav.scrolled{background:rgba(15,26,20,0.92);backdrop-filter:blur(20px);border-bottom:1px solid var(--border-subtle)}
.nav-logo{font-family:'Outfit',sans-serif;font-size:1.5rem;font-weight:800;color:var(--text-primary);display:flex;align-items:center;gap:10px}
.nav-logo span{color:var(--gold)}
.nav-links{display:flex;gap:32px;align-items:center}
.nav-links a{font-family:'Outfit',sans-serif;font-size:15px;font-weight:500;color:var(--text-secondary);position:relative;padding:4px 0}
.nav-links a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--gold);transition:width .3s ease}
.nav-links a:hover{color:var(--text-primary)}
.nav-links a:hover::after{width:100%}
.nav-links a.active{color:var(--gold)}
.nav-cta{font-family:'Outfit',sans-serif;font-size:14px;font-weight:600;padding:10px 24px;border-radius:999px;background:var(--gold);color:var(--bg-dark);transition:all .3s ease}
.nav-cta:hover{background:var(--gold-light);transform:translateY(-2px)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--text-primary);transition:all .3s ease;border-radius:2px}
.nav-toggle.open span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* Mobile Nav Drawer */
.nav-drawer{position:fixed;top:0;right:-100%;width:300px;height:100vh;background:var(--bg-dark);z-index:999;transition:right .4s cubic-bezier(0.16,1,0.3,1);padding:80px 30px;display:flex;flex-direction:column;gap:20px;border-left:1px solid var(--border-subtle)}
.nav-drawer.open{right:0}
.nav-drawer a{font-family:'Outfit',sans-serif;font-size:18px;color:var(--text-secondary);padding:12px 0;border-bottom:1px solid var(--border-card)}
.nav-drawer a:hover{color:var(--gold)}
.nav-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.5);z-index:998;opacity:0;visibility:hidden;transition:all .3s ease}
.nav-overlay.open{opacity:1;visibility:visible}

/* ===== Buttons ===== */
.btn{display:inline-flex;align-items:center;gap:8px;font-family:'Outfit',sans-serif;font-size:15px;font-weight:600;padding:14px 32px;border-radius:999px;cursor:pointer;transition:all .3s cubic-bezier(0.16,1,0.3,1);border:none;text-decoration:none}
.btn-primary{background:var(--gold);color:var(--bg-dark)}
.btn-primary:hover{background:var(--gold-light);transform:translateY(-2px);box-shadow:0 12px 30px -10px rgba(212,168,67,0.5)}
.btn-outline{background:transparent;color:var(--text-primary);border:1.5px solid var(--border-subtle)}
.btn-outline:hover{border-color:var(--gold);color:var(--gold);transform:translateY(-2px)}

/* ===== Cards ===== */
.card{background:var(--bg-card);border:1px solid var(--border-card);border-radius:24px;overflow:hidden;transition:all .4s cubic-bezier(0.16,1,0.3,1);position:relative}
.card:hover{border-color:rgba(212,168,67,0.3);transform:translateY(-6px);box-shadow:0 30px 60px -20px rgba(0,0,0,0.5)}
.card-img{height:260px;background-size:cover;background-position:center;position:relative;overflow:hidden;background-color:var(--bg-card)}
.card-img::after{content:'';position:absolute;inset:0;background:linear-gradient(to top,var(--bg-card) 0%,transparent 50%);pointer-events:none}
.card-img img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.card-body{padding:28px}
.card-tag{display:inline-block;font-family:'Outfit',sans-serif;font-size:12px;font-weight:600;padding:4px 12px;border-radius:999px;background:rgba(61,139,110,0.15);color:var(--green-light);margin-bottom:12px}
.card-title{font-size:1.4rem;color:var(--text-primary);margin-bottom:10px}
.card-text{font-size:0.95rem;color:var(--text-secondary);line-height:1.6}

/* ===== Bento Grid ===== */
.bento{display:grid;grid-template-columns:repeat(12,1fr);gap:20px}
.bento-lg{grid-column:span 8}
.bento-md{grid-column:span 6}
.bento-sm{grid-column:span 4}
.bento-xs{grid-column:span 3}
@media(max-width:1024px){.bento-lg,.bento-md,.bento-sm,.bento-xs{grid-column:span 12}}
@media(max-width:768px){.bento{gap:16px}.bento-lg,.bento-md,.bento-sm,.bento-xs{grid-column:span 12}}

/* ===== Animations ===== */
.reveal{opacity:0;transform:translateY(40px);transition:opacity .8s cubic-bezier(0.16,1,0.3,1),transform .8s cubic-bezier(0.16,1,0.3,1)}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-delay-1{transition-delay:.1s}
.reveal-delay-2{transition-delay:.2s}
.reveal-delay-3{transition-delay:.3s}
.reveal-delay-4{transition-delay:.4s}

@keyframes shimmer{0%{background-position:-200% 0}100%{background-position:200% 0}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
@keyframes pulse-gold{0%,100%{box-shadow:0 0 0 0 rgba(212,168,67,0.4)}50%{box-shadow:0 0 0 12px rgba(212,168,67,0)}}
@keyframes gradient-shift{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}

.float-anim{animation:float 6s ease-in-out infinite}
.pulse-gold{animation:pulse-gold 2s ease-in-out infinite}

/* ===== Hero ===== */
.hero{min-height:100dvh;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:linear-gradient(135deg,rgba(15,26,20,0.7) 0%,rgba(26,58,46,0.5) 50%,rgba(15,26,20,0.8) 100%),url('../images/jiuzhaigou-autumn.jpg') center/cover;z-index:0}
.hero-bg::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 30% 40%,rgba(61,139,110,0.2) 0%,transparent 50%),radial-gradient(ellipse at 70% 60%,rgba(212,168,67,0.1) 0%,transparent 50%);animation:gradient-shift 15s ease infinite;background-size:200% 200%}
.hero-content{position:relative;z-index:2;text-align:center;max-width:900px;padding:0 24px}
.hero-title{font-size:clamp(2.5rem,7vw,5.5rem);color:var(--text-primary);margin-bottom:24px;line-height:1.1}
.hero-title .accent{color:var(--gold);display:block}
.hero-subtitle{font-size:clamp(1rem,2vw,1.4rem);color:var(--text-secondary);margin-bottom:40px;max-width:600px;margin-left:auto;margin-right:auto}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.hero-scroll{position:absolute;bottom:40px;left:50%;transform:translateX(-50%);z-index:2;color:var(--text-muted);font-family:'Outfit',sans-serif;font-size:13px;letter-spacing:2px;display:flex;flex-direction:column;align-items:center;gap:8px}
.hero-scroll::after{content:'';width:1px;height:40px;background:linear-gradient(to bottom,var(--gold),transparent);animation:scroll-line 2s ease-in-out infinite}
@keyframes scroll-line{0%,100%{height:40px;opacity:1}50%{height:60px;opacity:.5}}

/* ===== Stats Bar ===== */
.stats-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:60px 0;border-top:1px solid var(--border-subtle);border-bottom:1px solid var(--border-subtle)}
.stat{text-align:center}
.stat-num{font-family:'Outfit',sans-serif;font-size:clamp(2rem,4vw,3.5rem);font-weight:800;color:var(--gold);display:block}
.stat-label{font-family:'Outfit',sans-serif;font-size:14px;color:var(--text-secondary);margin-top:8px;letter-spacing:1px}
@media(max-width:768px){.stats-bar{grid-template-columns:repeat(2,1fr);gap:32px}}

/* ===== 3D Tilt Card ===== */
.tilt-card{transform-style:preserve-3d;transition:transform .3s ease}
.tilt-card-inner{transform-style:preserve-3d}
.tilt-card .card-img{transform:translateZ(20px)}

/* ===== Footer ===== */
.footer{background:var(--bg-dark);border-top:1px solid var(--border-subtle);padding:60px 0 40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
@media(max-width:768px){.footer-grid{grid-template-columns:1fr 1fr;gap:30px}}
.footer-logo{font-family:'Outfit',sans-serif;font-size:1.5rem;font-weight:800;color:var(--text-primary);margin-bottom:16px}
.footer-logo span{color:var(--gold)}
.footer-desc{color:var(--text-muted);font-size:0.9rem;max-width:300px}
.footer-col h4{font-size:1rem;color:var(--text-primary);margin-bottom:16px}
.footer-col a{display:block;color:var(--text-muted);font-size:0.9rem;margin-bottom:8px;transition:color .3s}
.footer-col a:hover{color:var(--gold)}
.footer-bottom{border-top:1px solid var(--border-card);padding-top:24px;display:flex;justify-content:space-between;align-items:center;color:var(--text-muted);font-size:0.85rem}
@media(max-width:768px){.footer-bottom{flex-direction:column;gap:12px;text-align:center}}

/* ===== Utility ===== */
.text-center{text-align:center}
.text-gold{color:var(--gold)}
.text-green{color:var(--green-light)}
.bg-card{background:var(--bg-card)}
.hidden-mobile{display:block}
@media(max-width:768px){.hidden-mobile{display:none}}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
@media(max-width:1024px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}

/* Spicy level indicator */
.spicy-bar{display:inline-flex;gap:3px;align-items:center}
.spicy-dot{width:8px;height:8px;border-radius:50%;background:var(--border-subtle)}
.spicy-dot.active{background:#e63946}

/* Tag filter */
.filter-bar{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:40px}
.filter-tag{font-family:'Outfit',sans-serif;font-size:14px;font-weight:500;padding:8px 20px;border-radius:999px;border:1px solid var(--border-subtle);color:var(--text-secondary);cursor:pointer;transition:all .3s ease;background:none}
.filter-tag:hover{border-color:var(--gold);color:var(--gold)}
.filter-tag.active{background:var(--gold);color:var(--bg-dark);border-color:var(--gold)}

/* Timeline */
.timeline{position:relative;padding-left:40px}
.timeline::before{content:'';position:absolute;left:15px;top:0;bottom:0;width:2px;background:linear-gradient(to bottom,var(--gold),var(--green-mid),transparent)}
.timeline-item{position:relative;margin-bottom:48px}
.timeline-item::before{content:'';position:absolute;left:-33px;top:6px;width:14px;height:14px;border-radius:50%;background:var(--gold);border:3px solid var(--bg-dark);box-shadow:0 0 0 2px var(--gold)}

/* Breadcrumb */
.breadcrumb{display:flex;gap:8px;align-items:center;font-family:'Outfit',sans-serif;font-size:14px;color:var(--text-muted);margin-bottom:30px}
.breadcrumb a:hover{color:var(--gold)}
.breadcrumb span{color:var(--text-secondary)}