/* === 山河道图 户外主题样式 === */
:root {
    --green-dark: #1a3c2a;
    --green: #2d6a4f;
    --green-light: #40916c;
    --green-lighter: #52b788;
    --green-pale: #95d5b2;
    --earth: #8b6f47;
    --earth-light: #c4a97d;
    --sky: #1a5276;
    --sky-light: #2e86c1;
    --sky-pale: #aed6f1;
    --bg: #f8f6f0;
    --bg-card: #ffffff;
    --text: #1a1a2e;
    --text-light: #555;
    --border: #e0dcd0;
    --shadow: rgba(0,0,0,0.08);
    --radius: 12px;
    --nav-height: 64px;
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { font-family:'Noto Sans SC', system-ui, sans-serif; background:var(--bg); color:var(--text); line-height:1.7; padding-top:var(--nav-height); }

/* Nav */
#navbar { position:fixed; top:0; left:0; right:0; z-index:1000; background:rgba(255,255,255,0.92); backdrop-filter:blur(12px); -webkit-backdrop-filter:blur(12px); border-bottom:1px solid var(--border); height:var(--nav-height); }
.nav-inner { max-width:1200px; margin:0 auto; padding:0 24px; display:flex; align-items:center; justify-content:space-between; height:100%; }
.logo { display:flex; align-items:center; gap:8px; text-decoration:none; color:var(--green-dark); font-size:20px; font-weight:700; }
.logo-icon { font-size:24px; }
.nav-links { display:flex; gap:4px; }
.nav-links a { padding:8px 16px; border-radius:8px; text-decoration:none; color:var(--text); font-size:14px; font-weight:500; transition:all 0.2s; }
.nav-links a:hover { background:var(--green-pale); color:var(--green-dark); }
.nav-links a.active { background:var(--green); color:#fff; }
.nav-toggle { display:none; background:none; border:none; font-size:24px; cursor:pointer; color:var(--green-dark); }

/* Hero */
.hero { position:relative; min-height:calc(100vh - var(--nav-height)); display:flex; align-items:center; overflow:hidden; background:linear-gradient(135deg, var(--green-dark) 0%, var(--green) 40%, var(--green-light) 70%, var(--sky) 100%); }
.hero-bg { position:absolute; inset:0; opacity:0.1; background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="white" d="M0,160L48,176C96,192,192,224,288,213C384,203,480,149,576,138C672,128,768,160,864,176C960,192,1056,192,1152,176C1248,160,1344,128,1392,112L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"/></svg>') no-repeat bottom; background-size:cover; }
.hero-content { position:relative; max-width:1200px; margin:0 auto; padding:40px 24px; display:flex; align-items:center; gap:60px; }
.hero-text { flex:1; }
.hero-title { font-size:64px; font-weight:900; color:#fff; line-height:1.1; margin-bottom:12px; text-shadow:0 2px 20px rgba(0,0,0,0.2); }
.hero-subtitle { font-size:22px; color:var(--green-pale); font-weight:500; margin-bottom:8px; }
.hero-desc { font-size:16px; color:rgba(255,255,255,0.7); margin-bottom:40px; letter-spacing:2px; }
.hero-stats { display:flex; gap:32px; }
.stat-item { text-align:center; }
.stat-num { display:block; font-size:42px; font-weight:900; color:#fff; line-height:1; }
.stat-label { display:block; font-size:13px; color:var(--green-pale); margin-top:4px; line-height:1.4; }

/* Mountain scene */
.hero-visual { flex:0 0 280px; height:350px; position:relative; }
.mountain-scene { width:100%; height:100%; position:relative; overflow:hidden; }
.mtn { position:absolute; bottom:0; border-radius:0; }
.mtn-4 { left:0; width:100%; height:60px; background:var(--green-pale); opacity:0.4; clip-path:polygon(0% 100%,5% 70%,15% 80%,25% 50%,35% 65%,50% 40%,60% 55%,75% 35%,85% 50%,100% 60%,100% 100%); }
.mtn-3 { left:0; width:100%; height:90px; background:var(--green-lighter); opacity:0.5; clip-path:polygon(0% 100%,10% 65%,20% 75%,30% 45%,42% 60%,55% 30%,68% 50%,80% 35%,92% 55%,100% 45%,100% 100%); }
.mtn-2 { left:0; width:100%; height:130px; background:var(--green-light); opacity:0.6; clip-path:polygon(0% 100%,8% 55%,18% 65%,28% 35%,40% 50%,52% 20%,65% 40%,78% 25%,90% 45%,100% 35%,100% 100%); }
.mtn-1 { left:0; width:100%; height:180px; background:var(--sky-light); opacity:0.4; clip-path:polygon(0% 100%,5% 45%,15% 55%,25% 25%,38% 40%,48% 10%,60% 30%,72% 15%,85% 35%,100% 25%,100% 100%); }
.sun { position:absolute; top:40px; right:40px; width:60px; height:60px; border-radius:50%; background:radial-gradient(circle, #ffd700, #ff8c00); box-shadow:0 0 40px rgba(255,215,0,0.5); }

/* Sections */
.section { padding:80px 0; }
.section-alt { background:var(--bg-card); }
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section-header { text-align:center; margin-bottom:48px; }
.section-header h2 { font-size:36px; font-weight:700; color:var(--green-dark); margin-bottom:12px; }
.section-desc { max-width:600px; margin:0 auto; color:var(--text-light); font-size:16px; }

/* Peak Grid */
.peak-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:16px; margin-bottom:48px; }
.peak-card { background:var(--bg-card); border-radius:var(--radius); padding:20px; border:1px solid var(--border); transition:all 0.2s; position:relative; overflow:hidden; }
.peak-card:hover { transform:translateY(-4px); box-shadow:0 8px 30px var(--shadow); border-color:var(--green-lighter); }
.peak-rank { position:absolute; top:12px; right:12px; width:32px; height:32px; border-radius:50%; background:var(--green); color:#fff; display:flex; align-items:center; justify-content:center; font-size:14px; font-weight:700; }
.peak-name { font-size:20px; font-weight:700; color:var(--green-dark); margin-bottom:4px; }
.peak-county { font-size:13px; color:var(--text-light); margin-bottom:8px; }
.peak-elev { font-size:24px; font-weight:700; color:var(--green-light); }
.peak-elev small { font-size:12px; font-weight:400; color:var(--text-light); }
.peak-difficulty { margin-top:8px; display:flex; align-items:center; gap:8px; }
.peak-difficulty .stars { color:#f1c40f; font-size:14px; }
.peak-difficulty .desc { font-size:12px; color:var(--text-light); }
.peak-tag { display:inline-block; padding:4px 10px; border-radius:20px; font-size:11px; font-weight:500; margin-top:8px; }
.tag-hard { background:#fde8e8; color:#c0392b; }
.tag-mid { background:#fef3cd; color:#856404; }
.tag-easy { background:#d4edda; color:#155724; }

/* Achievement */
.peak-achievement { display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:20px; }
.achievement-card { background:var(--bg-card); border-radius:var(--radius); padding:24px; border:1px solid var(--border); text-align:center; }
.achievement-icon { font-size:36px; display:block; margin-bottom:8px; }
.achievement-card h3 { font-size:18px; color:var(--green-dark); margin-bottom:6px; }
.achievement-card p { color:var(--text-light); font-size:14px; }
.progress-bar { height:24px; background:#e9ecef; border-radius:12px; margin-top:12px; overflow:hidden; }
.progress-fill { height:100%; background:linear-gradient(90deg, var(--green), var(--green-lighter)); border-radius:12px; display:flex; align-items:center; justify-content:center; color:#fff; font-size:12px; font-weight:700; }

/* Province Filter */
.province-filter { display:flex; flex-wrap:wrap; gap:8px; justify-content:center; margin-bottom:32px; }
.province-filter button { padding:8px 18px; border:1px solid var(--border); border-radius:20px; background:var(--bg-card); cursor:pointer; font-size:14px; color:var(--text); transition:all 0.2s; }
.province-filter button:hover { border-color:var(--green); color:var(--green); }
.province-filter button.active { background:var(--green); color:#fff; border-color:var(--green); }

/* Checkpoint Grid */
.checkpoint-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:16px; }

/* Track Stats */
.track-stats { display:grid; grid-template-columns:repeat(auto-fit,minmax(150px,1fr)); gap:16px; margin-bottom:32px; }
.track-stat-card { background:var(--bg-card); border-radius:var(--radius); padding:24px; text-align:center; border:1px solid var(--border); }
.track-stat-num { display:block; font-size:36px; font-weight:700; color:var(--green); }
.track-stat-label { font-size:14px; color:var(--text-light); margin-top:4px; }
.track-info { background:var(--bg-card); border-radius:var(--radius); padding:24px; border:1px solid var(--border); line-height:1.8; color:var(--text-light); font-size:14px; }

/* Food Grid */
.food-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(300px,1fr)); gap:16px; }
.food-card { background:var(--bg-card); border-radius:var(--radius); padding:20px; border:1px solid var(--border); }
.food-card h3 { color:var(--green-dark); font-size:18px; margin-bottom:8px; }
.food-card p { color:var(--text-light); font-size:14px; line-height:1.6; }

/* G219 */
.g219-overview { display:grid; grid-template-columns:1fr 1fr; gap:32px; }
.route-segment { display:flex; align-items:center; gap:12px; padding:10px 0; border-bottom:1px solid var(--border); }
.route-segment:last-child { border-bottom:none; }
.segment-color { width:12px; height:12px; border-radius:50%; flex-shrink:0; }
.route-segment div { font-size:14px; color:var(--text); }
.route-segment em { color:var(--text-light); font-style:normal; font-size:12px; }
.g219-dream { margin-top:24px; padding:16px; background:linear-gradient(135deg, #fef3cd, #fff3e0); border-radius:var(--radius); color:var(--earth); font-size:15px; }
.g219-highlights { background:var(--bg-card); border-radius:var(--radius); padding:24px; border:1px solid var(--border); }
.g219-highlights h3 { font-size:18px; color:var(--green-dark); margin-bottom:12px; }
.g219-highlights ul { list-style:none; }
.g219-highlights li { padding:8px 0; border-bottom:1px solid var(--border); font-size:14px; color:var(--text); }
.g219-highlights li:last-child { border-bottom:none; }

/* Footer */
footer { background:var(--green-dark); color:rgba(255,255,255,0.7); padding:32px 0; }
.footer-inner { max-width:1200px; margin:0 auto; padding:0 24px; display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:16px; }
.footer-info p { font-size:14px; margin-bottom:4px; }
.icp-info { font-size:13px; }
.icp-info a { color:var(--green-pale); text-decoration:none; }
.icp-info a:hover { color:#fff; }
.sep { margin:0 8px; opacity:0.4; }
.footer-links a { color:var(--green-pale); text-decoration:none; font-size:13px; }
.footer-links a:hover { color:#fff; }

/* Responsive */
@media (max-width:768px) {
    .nav-links { display:none; position:absolute; top:var(--nav-height); left:0; right:0; background:rgba(255,255,255,0.98); flex-direction:column; padding:16px; border-bottom:1px solid var(--border); gap:4px; }
    .nav-links.open { display:flex; }
    .nav-toggle { display:block; }
    .hero-content { flex-direction:column; text-align:center; gap:32px; }
    .hero-title { font-size:40px; }
    .hero-stats { justify-content:center; gap:20px; }
    .hero-visual { flex-basis:auto; height:200px; width:100%; }
    .stat-num { font-size:32px; }
    .section-header h2 { font-size:28px; }
    .g219-overview { grid-template-columns:1fr; }
    .peak-grid { grid-template-columns:1fr 1fr; }
    .footer-inner { flex-direction:column; text-align:center; }
}
@media (max-width:480px) {
    .peak-grid { grid-template-columns:1fr; }
    .hero-title { font-size:32px; }
    .hero-stats { flex-wrap:wrap; }
}