/* ===== Reset & Base ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#f5f5f7;--bg-2:#ffffff;--text:#1d1d1f;--text-2:#6e6e73;--text-3:#86868b;
  --border:rgba(0,0,0,.08);--glass:rgba(255,255,255,.72);--glass-border:rgba(255,255,255,.6);
  --accent:#0071e3;--accent-hover:#0077ed;--radius:18px;--radius-sm:12px;
  --shadow-sm:0 1px 3px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04);
  --shadow-md:0 8px 24px rgba(0,0,0,.08),0 2px 8px rgba(0,0,0,.04);
  --shadow-lg:0 20px 50px rgba(0,0,0,.12),0 8px 20px rgba(0,0,0,.06);
  --ease-spring:cubic-bezier(.34,1.56,.64,1);--ease-out:cubic-bezier(.25,.46,.45,.94);
}
[data-theme="dark"]{
  --bg:#000;--bg-2:#1c1c1e;--text:#f5f5f7;--text-2:#a1a1a6;--text-3:#6e6e73;
  --border:rgba(255,255,255,.1);--glass:rgba(28,28,30,.72);--glass-border:rgba(255,255,255,.12);
  --shadow-sm:0 1px 3px rgba(0,0,0,.3);--shadow-md:0 8px 24px rgba(0,0,0,.4);--shadow-lg:0 20px 50px rgba(0,0,0,.5);
}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.5;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}

/* ===== Nav ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:var(--glass);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:52px;display:flex;align-items:center;justify-content:space-between}
.nav-brand{font-size:17px;font-weight:600;letter-spacing:-.02em}
.nav-links{display:flex;gap:24px}
.nav-links a{font-size:14px;color:var(--text-2);transition:color .2s}
.nav-links a:hover{color:var(--text)}
.nav-lang select{font-size:13px;padding:4px 8px;border-radius:8px;border:1px solid var(--border);background:var(--bg-2);color:var(--text);cursor:pointer;outline:none}

/* ===== Hero ===== */
.hero{padding:120px 24px 60px;text-align:center;max-width:900px;margin:0 auto}
.hero-sub{font-size:14px;font-weight:500;color:var(--accent);text-transform:uppercase;letter-spacing:.08em;margin-bottom:16px;opacity:0;animation:fadeUp .6s var(--ease-out) .1s forwards}
.hero h1{font-size:clamp(36px,6vw,64px);font-weight:700;letter-spacing:-.03em;line-height:1.08;margin-bottom:20px;opacity:0;animation:fadeUp .6s var(--ease-out) .2s forwards}
.hero h1 span{background:linear-gradient(135deg,var(--accent),#6e6e73);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:clamp(15px,2vw,19px);color:var(--text-2);max-width:600px;margin:0 auto;opacity:0;animation:fadeUp .6s var(--ease-out) .3s forwards}
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}

/* ===== Collection ===== */
.collection{max-width:1200px;margin:0 auto;padding:40px 24px 80px}
.brand-section{margin-bottom:48px}
.brand-title{font-size:22px;font-weight:600;margin-bottom:20px;padding-left:4px;display:flex;align-items:center;gap:10px}
.brand-title::before{content:'';width:4px;height:22px;background:var(--accent);border-radius:2px}
.phone-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px}

/* ===== Phone Card ===== */
.phone-card{background:var(--bg-2);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);cursor:pointer;transition:transform .4s var(--ease-spring),box-shadow .4s var(--ease-out);border:1px solid var(--border)}
.phone-card:hover{transform:translateY(-6px) scale(1.01);box-shadow:var(--shadow-lg)}
.phone-card-img{aspect-ratio:4/3;display:flex;align-items:center;justify-content:center;padding:24px;background:linear-gradient(135deg,var(--bg),var(--bg-2));overflow:hidden}
.phone-card-img img{max-height:100%;object-fit:contain;transition:transform .5s var(--ease-spring);filter:drop-shadow(0 8px 16px rgba(0,0,0,.12))}
.phone-card:hover .phone-card-img img{transform:scale(1.06) rotate(-2deg)}
.phone-card-info{padding:16px 18px 18px}
.phone-card-brand{font-size:11px;font-weight:600;color:var(--text-3);text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px}
.phone-card-name{font-size:17px;font-weight:600;margin-bottom:6px;letter-spacing:-.01em}
.phone-card-meta{font-size:13px;color:var(--text-2);display:flex;gap:12px;flex-wrap:wrap}
.phone-card-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}
.phone-card-tag{font-size:11px;padding:3px 8px;border-radius:6px;background:var(--bg);color:var(--text-2);border:1px solid var(--border)}

/* ===== Detail Page ===== */
.detail{max-width:1100px;margin:0 auto;padding:80px 24px 60px}
.detail-back{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--text-2);margin-bottom:24px;transition:color .2s,transform .2s}
.detail-back:hover{color:var(--accent);transform:translateX(-3px)}
.detail-back svg{width:16px;height:16px}
.detail-header{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;margin-bottom:48px}
.detail-hero-img{aspect-ratio:1;display:flex;align-items:center;justify-content:center;background:var(--bg-2);border-radius:var(--radius);padding:40px;box-shadow:var(--shadow-md);border:1px solid var(--border)}
.detail-hero-img img{max-height:100%;object-fit:contain;filter:drop-shadow(0 12px 24px rgba(0,0,0,.15))}
.detail-info h1{font-size:clamp(28px,4vw,40px);font-weight:700;letter-spacing:-.02em;margin-bottom:8px}
.detail-brand{font-size:14px;font-weight:600;color:var(--accent);text-transform:uppercase;letter-spacing:.08em;margin-bottom:16px}
.detail-meta{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}
.detail-meta-row{display:flex;gap:8px;font-size:15px}
.detail-meta-label{color:var(--text-3);min-width:70px;font-weight:500}
.detail-colors{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}
.detail-color{font-size:12px;padding:5px 12px;border-radius:20px;background:var(--bg-2);border:1px solid var(--border);color:var(--text-2)}
.detail-tags{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:28px}
.detail-tag{font-size:12px;padding:5px 12px;border-radius:8px;background:var(--accent);color:#fff;font-weight:500}

/* ===== CTA Button ===== */
.cta-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 28px;font-size:16px;font-weight:600;color:#fff;background:var(--accent);border-radius:980px;transition:transform .3s var(--ease-spring),background .2s,box-shadow .3s;box-shadow:0 4px 14px rgba(0,113,227,.3)}
.cta-btn:hover{background:var(--accent-hover);transform:scale(1.04);box-shadow:0 6px 20px rgba(0,113,227,.4)}
.cta-btn:active{transform:scale(.97)}
.cta-btn svg{width:18px;height:18px}

/* ===== Section ===== */
.section{margin-bottom:48px}
.section-title{font-size:22px;font-weight:600;margin-bottom:20px;display:flex;align-items:center;gap:10px}
.section-title::before{content:'';width:4px;height:22px;background:var(--accent);border-radius:2px}

/* ===== Features ===== */
.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.feature-card{background:var(--bg-2);border-radius:var(--radius-sm);padding:20px;border:1px solid var(--border);transition:transform .3s var(--ease-spring),box-shadow .3s}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.feature-icon{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--accent),#5ac8fa);display:flex;align-items:center;justify-content:center;margin-bottom:12px}
.feature-icon svg{width:20px;height:20px;color:#fff}
.feature-title{font-size:15px;font-weight:600;margin-bottom:6px}
.feature-desc{font-size:13px;color:var(--text-2);line-height:1.5}

/* ===== Specs ===== */
.specs-table{background:var(--bg-2);border-radius:var(--radius);overflow:hidden;border:1px solid var(--border)}
.spec-group{border-bottom:1px solid var(--border)}
.spec-group:last-child{border-bottom:none}
.spec-group-header{padding:14px 20px;background:var(--bg);font-size:14px;font-weight:600;color:var(--text-2);cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:background .2s}
.spec-group-header:hover{background:var(--bg-2)}
.spec-group-header svg{width:16px;height:16px;transition:transform .3s var(--ease-spring)}
.spec-group.open .spec-group-header svg{transform:rotate(180deg)}
.spec-group-body{max-height:0;overflow:hidden;transition:max-height .4s var(--ease-out)}
.spec-group.open .spec-group-body{max-height:500px}
.spec-row{display:flex;padding:12px 20px;border-bottom:1px solid var(--border);font-size:14px}
.spec-row:last-child{border-bottom:none}
.spec-k{color:var(--text-3);min-width:120px;font-weight:500}
.spec-v{color:var(--text);flex:1}

/* ===== Gallery ===== */
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px}
.gallery-item{aspect-ratio:1;border-radius:var(--radius-sm);overflow:hidden;background:var(--bg-2);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;padding:16px;cursor:pointer;transition:transform .3s var(--ease-spring)}
.gallery-item:hover{transform:scale(1.03)}
.gallery-item img{max-height:100%;object-fit:contain}

/* ===== Iframe Modal ===== */
.iframe-modal{position:fixed;inset:0;z-index:200;background:var(--bg);display:none;flex-direction:column}
.iframe-modal.show{display:flex}
.iframe-header{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--glass);backdrop-filter:blur(20px);border-bottom:1px solid var(--border)}
.iframe-title{font-size:15px;font-weight:600}
.iframe-actions{display:flex;gap:10px;align-items:center}
.iframe-close{width:32px;height:32px;border-radius:50%;background:var(--bg-2);display:flex;align-items:center;justify-content:center;transition:transform .2s,background .2s}
.iframe-close:hover{transform:rotate(90deg);background:var(--border)}
.iframe-close svg{width:16px;height:16px}
.iframe-open{font-size:13px;padding:6px 14px;border-radius:980px;background:var(--accent);color:#fff;font-weight:500;transition:transform .2s}
.iframe-open:hover{transform:scale(1.05)}
.iframe-wrap{flex:1;position:relative}
.iframe-wrap iframe{width:100%;height:100%;border:none}
.iframe-loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:12px;color:var(--text-2);font-size:14px}
.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===== Footer ===== */
.footer{border-top:1px solid var(--border);padding:32px 24px;text-align:center}
.footer-inner{max-width:1200px;margin:0 auto}
.footer p{font-size:13px;color:var(--text-3)}
.footer-sub{margin-top:4px;font-size:12px!important;color:var(--text-3)!important;opacity:.7}

/* ===== Responsive ===== */
@media(max-width:768px){
  .detail-header{grid-template-columns:1fr;gap:24px}
  .detail-hero-img{padding:24px}
  .nav-links{display:none}
  .hero{padding:100px 20px 40px}
  .phone-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px}
  .phone-card-info{padding:12px 14px 14px}
  .phone-card-name{font-size:15px}
}