/* ============================================
   KFYZE.COM — Design System v2
   Apple-inspired · Dark Mode · Warm Amber Accent
   ============================================ */

/* --- Reset & Base --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,'SF Pro Display','Segoe UI','PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;line-height:1.7;min-height:100vh;overflow-x:hidden;transition:background .4s,color .4s;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .3s,opacity .3s}
ul,ol{list-style:none}

/* --- CSS Variables: Dark (default) --- */
:root{
  --bg:#0a0a0a;
  --bg-alt:#111111;
  --surface:rgba(255,255,255,.03);
  --surface-hover:rgba(255,255,255,.06);
  --border:rgba(255,255,255,.06);
  --text:#e8e8e8;
  --text-muted:#86868b;
  --text-heading:#f5f5f7;
  --accent:#f59e0b;
  --accent-hover:#fbbf24;
  --accent-glow:rgba(245,158,11,.2);
  --accent-subtle:rgba(245,158,11,.08);
  --gradient-start:#1a1a1a;
  --gradient-end:#0a0a0a;
  --card-bg:rgba(255,255,255,.025);
  --card-border:rgba(255,255,255,.05);
  --card-shadow:0 4px 24px rgba(0,0,0,.5);
  --card-hover-shadow:0 8px 40px rgba(0,0,0,.6);
  --nav-bg:rgba(10,10,10,.72);
  --nav-shadow:none;
  --footer-bg:rgba(0,0,0,.4);
  --badge-bg:rgba(245,158,11,.12);
  --badge-text:#f59e0b;
  --hero-overlay:linear-gradient(180deg,rgba(10,10,10,0) 0%,rgba(10,10,10,.5) 60%,rgba(10,10,10,.95) 100%);
  --scrollbar-thumb:rgba(255,255,255,.12);
  --scrollbar-track:transparent;
  --radius-sm:8px;
  --radius:12px;
  --radius-lg:16px;
  --radius-xl:24px;
  --transition:all .3s cubic-bezier(.4,0,.2,1);
}

/* --- Light Mode --- */
:root[data-theme="light"]{
  --bg:#f5f5f7;
  --bg-alt:#ffffff;
  --surface:rgba(0,0,0,.02);
  --surface-hover:rgba(0,0,0,.04);
  --border:rgba(0,0,0,.06);
  --text:#1d1d1f;
  --text-muted:#86868b;
  --text-heading:#1d1d1f;
  --accent:#d97706;
  --accent-hover:#b45309;
  --accent-glow:rgba(217,119,6,.1);
  --accent-subtle:rgba(217,119,6,.06);
  --gradient-start:#f5f5f7;
  --gradient-end:#ffffff;
  --card-bg:rgba(255,255,255,.8);
  --card-border:rgba(0,0,0,.06);
  --card-shadow:0 2px 16px rgba(0,0,0,.04);
  --card-hover-shadow:0 4px 24px rgba(0,0,0,.08);
  --nav-bg:rgba(245,245,247,.72);
  --footer-bg:rgba(0,0,0,.03);
  --badge-bg:rgba(217,119,6,.1);
  --badge-text:#d97706;
  --hero-overlay:linear-gradient(180deg,rgba(245,245,247,0) 0%,rgba(245,245,247,.7) 60%,rgba(245,245,247,1) 100%);
  --scrollbar-thumb:rgba(0,0,0,.12);
}

/* --- Background --- */
body{background:var(--bg);color:var(--text)}
body::before{content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;background:radial-gradient(ellipse 80% 60% at 50% 0%,var(--accent-subtle),transparent 70%)}

/* --- Scrollbar --- */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--scrollbar-track)}
::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}

/* --- Container --- */
.container{width:100%;max-width:1080px;margin:0 auto;padding:0 24px}

/* --- Section title accent bar --- */
.section-header{text-align:center;margin-bottom:56px}
.section-header .section-label{display:inline-block;padding:4px 14px;border-radius:20px;background:var(--accent-subtle);color:var(--accent);font-size:.75rem;font-weight:600;margin-bottom:16px;letter-spacing:.8px;text-transform:uppercase}
.section-header h2{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:700;color:var(--text-heading);margin-bottom:12px;letter-spacing:-.3px}
.section-header p{color:var(--text-muted);max-width:560px;margin:0 auto;font-size:.95rem;line-height:1.6}

/* =====================
   NAVIGATION
   ===================== */
.navbar{position:sticky;top:0;z-index:1000;background:var(--nav-bg);backdrop-filter:blur(40px) saturate(1.5);-webkit-backdrop-filter:blur(40px) saturate(1.5);border-bottom:1px solid var(--border);padding:0 24px;transition:var(--transition)}
.navbar .container{display:flex;align-items:center;justify-content:space-between;height:52px}
.nav-brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.05rem;color:var(--text-heading);letter-spacing:-.2px}
.nav-brand img{height:24px;width:auto;border-radius:6px}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{padding:6px 14px;border-radius:8px;font-size:.82rem;font-weight:500;color:var(--text-muted);border:none;background:none;cursor:pointer;transition:var(--transition);white-space:nowrap;letter-spacing:-.1px}
.nav-links a:hover{color:var(--text-heading);background:var(--surface-hover)}
.nav-links a.active{color:var(--accent);background:var(--accent-subtle)}
.nav-external{color:var(--text-muted)!important;font-size:.8rem!important}
.nav-actions{display:flex;align-items:center;gap:6px}
.btn-icon{width:34px;height:34px;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text-muted);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition);font-size:.95rem}
.btn-icon:hover{background:var(--surface-hover);color:var(--text-heading);border-color:var(--accent)}
.lang-switch{padding:5px 10px;border-radius:7px;border:1px solid var(--border);background:var(--surface);color:var(--text-muted);font-size:.75rem;font-weight:600;cursor:pointer;transition:var(--transition);text-transform:uppercase;letter-spacing:.5px}
.lang-switch:hover{border-color:var(--accent);color:var(--accent)}
.nav-toggle{display:none;width:34px;height:34px;border:none;background:none;color:var(--text);cursor:pointer;font-size:1.2rem}

@media(max-width:960px){
  :root[data-theme="light"] .nav-links{background:rgba(245,245,247,.92)}
  .nav-links{position:fixed;top:52px;left:0;right:0;background:rgba(10,10,10,.90);backdrop-filter:blur(40px) saturate(1.5);-webkit-backdrop-filter:blur(40px) saturate(1.5);border-bottom:1px solid var(--border);flex-direction:column;padding:16px 24px;gap:4px;transform:translateY(-120%);transition:transform .35s cubic-bezier(.4,0,.2,1)}
  .nav-links.open{transform:translateY(0)}
  .nav-links a{width:100%;text-align:left;padding:12px 16px}
  .nav-toggle{display:flex;align-items:center;justify-content:center}
}

/* =====================
   HERO
   ===================== */
.hero{position:relative;padding:120px 0 80px;overflow:hidden;text-align:center}
.hero::before{content:'';position:absolute;inset:0;background:var(--hero-overlay);z-index:0}
.hero .container{position:relative;z-index:1}
.hero-badge{display:inline-block;padding:6px 18px;border-radius:20px;background:var(--accent-subtle);color:var(--accent);font-size:.78rem;font-weight:600;margin-bottom:24px;letter-spacing:.3px}
.hero-avatar-wrap{display:flex;flex-direction:column;align-items:center;gap:20px;margin-bottom:8px}
.hero-avatar{width:88px;height:88px;border-radius:22px;border:2px solid var(--border);box-shadow:0 0 40px var(--accent-subtle);object-fit:cover;transition:var(--transition)}
.hero-avatar:hover{transform:scale(1.03);box-shadow:0 0 60px var(--accent-glow)}
.hero h1{font-size:clamp(2.2rem,5vw,3.2rem);font-weight:800;color:var(--text-heading);line-height:1.15;margin-bottom:14px;letter-spacing:-1px}
.hero h1 .accent{color:var(--accent)}
.hero .subtitle{font-size:clamp(.95rem,2vw,1.1rem);color:var(--text-muted);max-width:520px;margin:0 auto 36px;line-height:1.6;font-weight:400}
.hero-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

/* Hero glow orb (subtle) */
.hero-glow{position:absolute;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,var(--accent-glow),transparent 70%);top:-100px;left:50%;transform:translateX(-50%);pointer-events:none;z-index:-1;opacity:.5}

/* =====================
   BUTTONS
   ===================== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:10px;font-size:.88rem;font-weight:600;cursor:pointer;transition:var(--transition);border:none;text-decoration:none;letter-spacing:-.1px}
.btn-primary{background:var(--accent);color:#0a0a0a;box-shadow:0 2px 12px var(--accent-glow)}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 4px 20px var(--accent-glow)}
.btn-outline{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-subtle)}
.btn-sm{padding:7px 14px;font-size:.78rem;border-radius:8px}

/* =====================
   SECTIONS
   ===================== */
.section{padding:80px 0}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}

/* =====================
   GRID
   ===================== */
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:768px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}
@media(min-width:769px) and (max-width:1024px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}

/* =====================
   CARDS — Apple style
   ===================== */
.card{display:block;padding:28px 24px;border-radius:var(--radius-lg);background:var(--card-bg);border:1px solid var(--card-border);box-shadow:var(--card-shadow);transition:var(--transition);position:relative;overflow:hidden}
.card:hover{transform:translateY(-2px);box-shadow:var(--card-hover-shadow);border-color:rgba(255,255,255,.1)}
.card::after{content:'';position:absolute;inset:0;border-radius:var(--radius-lg);opacity:0;transition:opacity .4s;background:radial-gradient(ellipse at 50% 0%,var(--accent-subtle),transparent 70%)}
.card:hover::after{opacity:1}
.card-icon{font-size:2rem;margin-bottom:16px;display:inline-block}
.card h3{font-size:1.05rem;font-weight:600;color:var(--text-heading);margin-bottom:8px;letter-spacing:-.2px}
.card p{font-size:.85rem;color:var(--text-muted);line-height:1.5}

/* =====================
   NEWS FEED (AI资讯)
   ===================== */
.news-item{display:flex;gap:16px;padding:20px 24px;border-radius:var(--radius);background:var(--card-bg);border:1px solid var(--card-border);transition:var(--transition);align-items:flex-start}
.news-item:hover{background:var(--surface-hover);border-color:rgba(255,255,255,.1)}
.news-item .news-source{flex-shrink:0;width:40px;height:40px;border-radius:10px;background:var(--surface);display:flex;align-items:center;justify-content:center;font-size:1.2rem}
.news-item .news-body{flex:1;min-width:0}
.news-item .news-title{font-size:.92rem;font-weight:600;color:var(--text-heading);margin-bottom:4px;line-height:1.4}
.news-item .news-meta{font-size:.75rem;color:var(--text-muted);display:flex;gap:12px;align-items:center}
.news-item .news-tag{display:inline-block;padding:2px 8px;border-radius:6px;background:var(--accent-subtle);color:var(--accent);font-size:.7rem;font-weight:600}

/* =====================
   TOOL CARDS (AI工具)
   ===================== */
.tool-card{display:flex;align-items:center;gap:16px;padding:20px 24px;border-radius:var(--radius);background:var(--card-bg);border:1px solid var(--card-border);transition:var(--transition)}
.tool-card:hover{transform:translateY(-1px);border-color:rgba(255,255,255,.1);box-shadow:var(--card-shadow)}
.tool-card .tool-icon{width:48px;height:48px;border-radius:12px;background:var(--surface);display:flex;align-items:center;justify-content:center;font-size:1.5rem;flex-shrink:0}
.tool-card .tool-info{flex:1;min-width:0}
.tool-card .tool-name{font-size:.92rem;font-weight:600;color:var(--text-heading);margin-bottom:2px}
.tool-card .tool-desc{font-size:.8rem;color:var(--text-muted)}
.tool-card .tool-arrow{color:var(--text-muted);font-size:1.1rem;transition:var(--transition)}
.tool-card:hover .tool-arrow{color:var(--accent);transform:translateX(3px)}

/* =====================
   FOOTER
   ===================== */
.footer{padding:56px 0 32px;background:var(--footer-bg);border-top:1px solid var(--border)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}
@media(max-width:768px){.footer-grid{grid-template-columns:1fr}}
.footer h4{font-size:.82rem;font-weight:600;color:var(--text-heading);margin-bottom:16px;letter-spacing:-.1px}
.footer p,.footer a{font-size:.82rem;color:var(--text-muted);line-height:1.8}
.footer a:hover{color:var(--accent)}
.footer-bottom{margin-top:40px;padding-top:24px;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-bottom p{font-size:.75rem;color:var(--text-muted)}

/* =====================
   UTILITIES
   ===================== */
.text-center{text-align:center}
.text-accent{color:var(--accent)}
.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:32px}.mt-5{margin-top:48px}
.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.mb-4{margin-bottom:32px}
.gap-sm{gap:12px}.gap-md{gap:24px}.gap-lg{gap:40px}

/* =====================   
   TIMELINE
   ===================== */
.timeline{max-width:700px;margin:0 auto;position:relative;padding-left:32px}
.timeline::before{content:'';position:absolute;left:11px;top:0;bottom:0;width:2px;background:var(--border)}
.timeline-item{position:relative;margin-bottom:40px}
.timeline-item::before{content:'';position:absolute;left:-26px;top:8px;width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent-glow)}
.timeline-item .year{font-size:.8rem;font-weight:700;color:var(--accent);margin-bottom:4px;letter-spacing:.5px}
.timeline-item h4{font-size:1rem;font-weight:600;color:var(--text-heading);margin-bottom:6px}
.timeline-item p{font-size:.85rem;color:var(--text-muted);line-height:1.6}

/* =====================
   VPS TABLE (keep for topvps page)
   ===================== */
.vps-table{width:100%;border-collapse:collapse}
.vps-table th{text-align:left;padding:12px 16px;font-size:.8rem;font-weight:600;color:var(--text-muted);border-bottom:1px solid var(--border);letter-spacing:.3px;text-transform:uppercase}
.vps-table td{padding:12px 16px;border-bottom:1px solid var(--border);font-size:.88rem}
.vps-table tbody tr{transition:var(--transition)}
.vps-table tbody tr:hover{background:var(--surface-hover)}
.price-tag{color:var(--accent)!important;font-weight:700}

/* =====================
   RESPONSIVE IMAGES
   ===================== */
img{max-width:100%;height:auto;border-radius:inherit}

/* =====================
   LINK ITEMS
   ===================== */
.link-item{display:flex;align-items:center;gap:10px;padding:14px 16px;border-radius:10px;background:var(--surface);border:1px solid var(--border);transition:var(--transition);font-size:.9rem;color:var(--text)}
.link-item:hover{border-color:var(--accent);background:var(--surface-hover);color:var(--accent)}
.link-item img{width:20px;height:20px;border-radius:4px}
.link-item i{width:20px;flex:0 0 20px;text-align:center;font-size:18px;line-height:1;opacity:.9}

/* =====================
   PARTNER CARDS
   ===================== */
.partner-grid{align-items:stretch}
.partner-card{display:grid;grid-template-columns:80px 1fr;align-items:center;gap:12px}
.partner-logo-wrap{display:flex;align-items:center;justify-content:flex-start;margin-bottom:0;grid-column:1;grid-row:1 / span 3}
.partner-logo{width:80px;height:80px;object-fit:contain;border-radius:12px}
.partner-logo-text{font-weight:800;font-size:1.4rem;color:var(--accent)}
.partner-card h3{margin-bottom:4px;grid-column:2}
.partner-card p{font-size:.9rem;color:var(--text-muted);grid-column:2}
.partner-card .card-link{grid-column:2}

/* =====================
   ABOUT PAGE
   ===================== */
.about-hero{display:flex;align-items:center;gap:48px;flex-wrap:wrap}
.about-avatar{width:200px;height:200px;border-radius:50%;object-fit:cover;border:3px solid var(--accent);box-shadow:0 0 48px var(--accent-glow)}
.about-info{flex:1;min-width:280px}
.about-info h1{font-size:2rem;font-weight:800;color:var(--text-heading);margin-bottom:8px}
.about-info .tagline{font-size:1.1rem;color:var(--accent);margin-bottom:16px}
.about-info p{color:var(--text-muted);line-height:1.8}

@media(max-width:960px){
  .about-hero{flex-direction:column;align-items:center;text-align:center;gap:24px}
  .about-avatar{margin:0 auto}
  .about-info{min-width:0;max-width:680px;text-align:center}
  .about-info .hero-actions{justify-content:center}
}

/* =====================
   NAV ICONS
   ===================== */
.nav-links a.nav-icon-only{display:inline-flex;align-items:center;justify-content:center;padding:8px;border-radius:8px;border:none;background:transparent;color:var(--text-muted)}
.nav-links a.nav-icon-only:hover{background:var(--surface-hover);color:var(--text-heading)}
.nav-links .nav-ext-row{display:flex;align-items:center;gap:10px;margin-left:10px;padding-left:10px;border-left:1px solid var(--border)}
.nav-links .nav-ext-row a.nav-icon-only{padding:8px}
.nav-links .nav-ext-row a.nav-icon-only svg{width:20px!important;height:20px!important}
@media(max-width:960px){
  .nav-links .nav-ext-row{display:flex;gap:8px;justify-content:center;padding:8px 0;border-top:1px solid var(--border);margin-top:6px;border-left:none;margin-left:0;padding-left:0}
}

/* =====================
   MOBILE TABLE WRAPPER
   ===================== */
@media(max-width:768px){
  .section .container{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .vps-table{width:auto!important;min-width:760px!important}
}