/* ============================================
   savunmasanayi.net — 名爵赛车群 · 暗金橙主题
   Inspired by original orange/amber Tailwind aesthetic
   ============================================ */

/* --- Font & Reset --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  color:#7c2d12;
  background:#fff7ed;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

/* --- Variables --- */
:root{
  --primary:#ea580c;
  --primary-dark:#c2410c;
  --primary-deeper:#9a3412;
  --accent:#f59e0b;
  --accent-dark:#d97706;
  --bg-light:#fffbeb;
  --bg-section:#fff7ed;
  --bg-card:#ffffff;
  --border-card:#fed7aa;
  --text-dark:#7c2d12;
  --text-body:#4b5563;
  --text-muted:#9ca3af;
  --radius:1rem;
  --radius-sm:0.75rem;
  --radius-full:9999px;
  --shadow-sm:0 1px 3px rgba(0,0,0,.08);
  --shadow-md:0 4px 20px rgba(234,88,12,.08);
  --shadow-lg:0 12px 28px rgba(234,88,12,.1);
  --nav-height:72px;
}

/* --- Container --- */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 1rem}
@media(min-width:640px){.container{padding:0 1.5rem}}
@media(min-width:1024px){.container{padding:0 2rem}}

/* --- Utilities --- */
.text-center{text-align:center}
.flex{display:flex}
.items-center{align-items:center}
.justify-center{justify-content:center}
.justify-between{justify-content:space-between}
.flex-col{flex-direction:column}
.flex-wrap{flex-wrap:wrap}
.gap-2{gap:0.5rem}
.gap-3{gap:0.75rem}
.gap-4{gap:1rem}
.gap-6{gap:1.5rem}
.gap-8{gap:2rem}
.gap-10{gap:2.5rem}
.mx-auto{margin-left:auto;margin-right:auto}
.mb-2{margin-bottom:0.5rem}
.mb-3{margin-bottom:0.75rem}
.mb-4{margin-bottom:1rem}
.mb-6{margin-bottom:1.5rem}
.mb-8{margin-bottom:2rem}
.mb-10{margin-bottom:2.5rem}
.mb-14{margin-bottom:3.5rem}
.mt-4{margin-top:1rem}
.mt-6{margin-top:1.5rem}
.mt-8{margin-top:2rem}
.mt-10{margin-top:2.5rem}
.mt-12{margin-top:3rem}
.max-w-2xl{max-width:42rem}
.max-w-3xl{max-width:48rem}
.max-w-5xl{max-width:64rem}
.hidden{display:none}
.block{display:block}
.relative{position:relative}
.overflow-hidden{overflow:hidden}
.overflow-x-auto{overflow-x:auto}

/* --- Grid --- */
.grid-2{display:grid;grid-template-columns:repeat(1,1fr);gap:1.5rem}
.grid-3{display:grid;grid-template-columns:repeat(1,1fr);gap:1.5rem}
.grid-4{display:grid;grid-template-columns:repeat(2,1fr);gap:1.25rem}
@media(min-width:768px){.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}}

/* --- Hero Main Gradient --- */
.hero-section{
  background:linear-gradient(135deg,#ea580c 0%,#f97316 45%,#fb923c 100%);
  padding-top:calc(var(--nav-height) + .5rem);
  padding-bottom:4rem;
  color:#fff;
}
@media(min-width:768px){.hero-section{padding-top:calc(var(--nav-height) + 1.5rem);padding-bottom:6rem}}

.hero-grid{display:grid;grid-template-columns:1fr;gap:2.5rem;align-items:center}
@media(min-width:768px){.hero-grid{grid-template-columns:1.2fr 1fr}}
@media(max-width:767px){.hero-right{order:-1}}

.hero-left h1{
  font-size:clamp(1.8rem,4vw,3rem);
  font-weight:800;
  line-height:1.2;
  text-shadow:0 2px 4px rgba(0,0,0,.2);
  margin-bottom:1rem;
}
.hero-left h1 .highlight{color:var(--accent)}
.hero-left p{
  font-size:clamp(0.95rem,1.5vw,1.1rem);
  opacity:.9;
  margin-bottom:1.5rem;
  max-width:36rem;
}
.hero-keywords{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:.5rem}
.hero-buttons{display:flex;flex-wrap:wrap;gap:.75rem;margin-bottom:.5rem}
.hero-usp{display:flex;flex-direction:column;gap:.4rem;font-size:.9rem;opacity:.9}
.hero-usp i{color:var(--accent);margin-right:.4rem}

.hero-right img{
  width:100%;height:auto;object-fit:cover;
  border-radius:var(--radius);
  box-shadow:0 20px 40px rgba(0,0,0,.3);
  transition:all .4s ease;
}
.hero-right img:hover{transform:translateY(-8px) scale(1.02);box-shadow:0 25px 50px rgba(0,0,0,.4)}

/* --- Navbar --- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  background:rgba(255,255,255,.95);backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(0,0,0,.05);
  transition:all .3s;
}
.nav-container{
  display:flex;align-items:center;justify-content:space-between;
  max-width:1200px;margin:0 auto;padding:0 1rem;height:var(--nav-height);
}
@media(min-width:640px){.nav-container{padding:0 1.5rem}}
@media(min-width:1024px){.nav-container{padding:0 2rem}}
.nav-brand{
  font-size:1.2rem;font-weight:800;color:var(--primary-dark);text-decoration:none;display:flex;align-items:center;gap:.5rem;
}
.nav-brand .logo-primary{color:var(--primary)}
.nav-brand .logo-sub{font-weight:400;font-size:.8rem;color:var(--text-body);display:none}
@media(min-width:480px){.nav-brand .logo-sub{display:inline}}
.nav-links{display:none;align-items:center;gap:1.5rem}
@media(min-width:768px){.nav-links{display:flex}}
.nav-links a{
  text-decoration:none;color:#374151;font-weight:500;font-size:.9rem;
  transition:color .2s;position:relative;
}
.nav-links a:hover,.nav-links a.active{color:var(--primary)}
.nav-links a.active::after{
  content:'';position:absolute;bottom:-4px;left:0;right:0;height:2px;
  background:var(--primary);border-radius:2px;
}
.nav-cta{display:none;align-items:center;gap:.5rem}
@media(min-width:768px){.nav-cta{display:flex}}
.nav-toggle{
  display:flex;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:4px;
}
.nav-toggle span{display:block;width:24px;height:2px;background:#374151;border-radius:2px;transition:.3s}
@media(min-width:768px){.nav-toggle{display:none}}

/* Mobile Menu */
.mobile-menu{
  max-height:0;overflow:hidden;transition:max-height .35s ease;
  background:#fff;border-bottom:1px solid var(--border-card);
}
.mobile-menu.open{max-height:500px}
.mobile-menu-inner{padding:.75rem 1rem;display:flex;flex-direction:column;gap:.5rem}
.mobile-menu-inner a{
  display:block;padding:.5rem 0;color:#374151;text-decoration:none;font-weight:500;font-size:.9rem;
}
.mobile-menu-inner a:hover,.mobile-menu-inner a.active{color:var(--primary)}

/* --- Buttons --- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.4rem;
  font-weight:600;font-size:.9rem;padding:.65rem 1.5rem;
  border-radius:var(--radius-full);text-decoration:none;
  transition:all .25s;border:none;cursor:pointer;
}
.btn-primary{background:var(--accent);color:#1f2937}
.btn-primary:hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn-white{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);color:#fff}
.btn-white:hover{background:rgba(255,255,255,.2)}
.btn-gold{background:var(--accent);color:#1f2937}
.btn-gold:hover{background:var(--accent-dark)}
.btn-dark{background:#1f2937;color:#fff}
.btn-dark:hover{background:#374151}
.btn-ghost{background:transparent;border:1px solid var(--primary);color:var(--primary)}
.btn-ghost:hover{background:rgba(234,88,12,.06)}
.btn-sm{padding:.45rem 1rem;font-size:.8rem}
.btn-lg{padding:.85rem 2rem;font-size:1.05rem}
.btn-block{width:100%}

/* --- Sections --- */
.section{padding:4rem 0}
.section-alt{background:var(--bg-section)}
@media(min-width:768px){.section{padding:5rem 0}}

.section-label{
  display:inline-block;font-size:.7rem;font-weight:700;letter-spacing:.08em;
  color:var(--primary);text-transform:uppercase;margin-bottom:.5rem;
}
.section-title{
  font-size:clamp(1.4rem,2.8vw,2.2rem);font-weight:800;color:#111827;margin-bottom:.75rem;
}
.section-title .highlight{color:var(--primary)}
.section-desc{color:var(--text-body);max-width:48rem;margin:0 auto 2.5rem;font-size:.95rem}

/* --- Cards --- */
.card{
  background:var(--bg-card);border-radius:var(--radius);
  padding:1.5rem;border:1px solid var(--border-card);
  transition:all .25s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}

.card-icon{
  width:48px;height:48px;border-radius:12px;
  background:rgba(234,88,12,.08);display:flex;align-items:center;justify-content:center;
  font-size:1.3rem;color:var(--primary);margin-bottom:1rem;
}
.card-tag{
  display:inline-block;font-size:.7rem;font-weight:600;padding:.15rem .6rem;
  border-radius:var(--radius-full);background:rgba(234,88,12,.08);color:var(--primary);
  margin-bottom:.5rem;
}
.card h3{font-size:1.05rem;font-weight:700;color:#111827;margin-bottom:.4rem}
.card p{color:var(--text-body);font-size:.88rem;line-height:1.55}

/* --- Step Number (list items) --- */
.step-num{
  width:36px;height:36px;min-width:36px;
  border-radius:999px;background:rgba(234,88,12,.1);
  display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:.85rem;color:var(--primary);
}

/* --- Stats --- */
.stats-banner{
  background:linear-gradient(90deg,#fff7ed,#ffedd5);
  border-radius:var(--radius);padding:1.5rem;border:1px solid var(--border-card);
}
.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;text-align:center}
@media(min-width:640px){.stats-grid{grid-template-columns:repeat(4,1fr)}}

.stat-item .stat-number{
  font-size:1.8rem;font-weight:800;color:var(--primary);
}
.stat-item .stat-label{font-size:.8rem;color:var(--text-body);margin-top:.15rem}

/* --- Testimonials --- */
.testimonial-card{
  background:var(--bg-card);border-radius:var(--radius);
  padding:1.5rem;border:1px solid var(--border-card);
  transition:all .25s;
}
.testimonial-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.stars{color:var(--accent);margin-bottom:.6rem;font-size:.9rem}
.testimonial-card blockquote{
  color:var(--text-body);font-size:.88rem;line-height:1.55;margin-bottom:1rem;
  font-style:italic;
}
.author{display:flex;align-items:center;gap:.7rem}
.author-avatar{
  width:38px;height:38px;border-radius:999px;background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-weight:700;font-size:.8rem;
}
.author-name{font-weight:600;font-size:.85rem;color:#111827}
.author-title{font-size:.75rem;color:var(--text-muted)}

/* --- Tagline Banner --- */
.tagline-banner{
  background:linear-gradient(90deg,var(--primary-dark),var(--primary),var(--accent));
  color:#fff;text-align:center;padding:1.2rem 1rem;
}
.tagline-text{font-size:clamp(1rem,2vw,1.4rem);font-weight:700;letter-spacing:.03em}
.tagline-sub{font-size:.8rem;opacity:.8;margin-top:.2rem}

/* --- FAQ Accordion --- */
.faq-list{max-width:48rem;margin:0 auto;display:flex;flex-direction:column;gap:.75rem}
.faq-item{
  border:1px solid var(--border-card);border-radius:var(--radius);overflow:hidden;
  background:var(--bg-card);
}
.faq-question{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:1rem 1.25rem;background:var(--bg-section);border:none;
  cursor:pointer;font-weight:600;font-size:.92rem;text-align:left;
  transition:background .2s;color:#111827;
}
.faq-question:hover{background:#fed7aa}
.faq-icon{font-size:1.2rem;color:var(--primary);transition:transform .3s;font-weight:700}
.faq-item.active .faq-icon{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-item.active .faq-answer{max-height:600px}
.faq-answer-inner{padding:.75rem 1.25rem 1.1rem;color:var(--text-body);font-size:.88rem;line-height:1.55}

/* --- CTA Section --- */
.cta-section{
  background:linear-gradient(135deg,var(--primary-dark),var(--primary),var(--accent));
  color:#fff;text-align:center;
}
.cta-section h2{font-size:clamp(1.4rem,2.5vw,2rem);font-weight:800;margin-bottom:.8rem}
.cta-section p{opacity:.9;margin-bottom:1.5rem;font-size:.95rem}
.cta-actions{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center}

/* --- Contact --- */
.contact-grid{display:grid;grid-template-columns:1fr;gap:1.5rem;max-width:48rem;margin:0 auto}
@media(min-width:768px){.contact-grid{grid-template-columns:1fr 1fr}}
.contact-info-card{
  background:var(--bg-card);border-radius:var(--radius);
  padding:1.5rem;border:1px solid var(--border-card);
}
.contact-info-card h3{font-size:1.1rem;font-weight:700;margin-bottom:1rem;color:#111827}
.contact-item{display:flex;align-items:flex-start;gap:.7rem;margin-bottom:.7rem}
.contact-item-icon{
  width:36px;height:36px;border-radius:10px;
  background:rgba(234,88,12,.08);display:flex;align-items:center;justify-content:center;
  color:var(--primary);min-width:36px;
}
.contact-item-label{font-size:.75rem;color:var(--text-muted)}
.contact-item-value{font-size:.9rem;font-weight:600;color:var(--primary)}
.contact-item-value a{color:var(--primary);text-decoration:none}
.contact-item-value a:hover{text-decoration:underline}

/* --- Warning Bar --- */
.warning-bar{
  background:linear-gradient(90deg,#451303,#7c2d12);
  color:#fed7aa;text-align:center;
  font-size:.78rem;padding:.45rem 1rem;
}

/* --- Hero Keywords Pills --- */
.kw{
  display:inline-block;font-size:.72rem;padding:.15rem .65rem;
  border-radius:999px;background:rgba(255,255,255,.15);
  color:rgba(255,255,255,.85);
}

/* --- Tables --- */
.data-table{width:100%;border-collapse:collapse;font-size:.88rem}
.data-table th{
  background:rgba(234,88,12,.08);color:var(--primary-dark);font-weight:700;
  padding:.75rem 1rem;text-align:left;border-bottom:2px solid var(--border-card);
}
.data-table td{padding:.65rem 1rem;border-bottom:1px solid #fed7aa;color:var(--text-body)}
.data-table tr:hover td{background:rgba(234,88,12,.04)}

/* --- Pill tags --- */
.pill{
  display:inline-block;font-size:.72rem;padding:.2rem .65rem;
  border-radius:999px;background:rgba(234,88,12,.08);color:var(--primary);
}

/* --- Timeline --- */
.timeline{position:relative;padding-left:1.5rem;max-width:42rem;margin:0 auto}
.timeline::before{
  content:'';position:absolute;left:7px;top:0;bottom:0;
  width:2px;background:linear-gradient(180deg,var(--primary),var(--accent));
}
.timeline-item{position:relative;margin-bottom:1.5rem}
.timeline-item::before{
  content:'';position:absolute;left:-1.35rem;top:.4rem;
  width:12px;height:12px;border-radius:999px;
  background:var(--primary);border:2px solid #fff;
}
.timeline-date{font-size:.75rem;color:var(--primary);font-weight:600;margin-bottom:.2rem}
.timeline-content{background:var(--bg-card);border-radius:var(--radius-sm);padding:.9rem 1rem;border:1px solid var(--border-card)}
.timeline-content h4{font-size:.9rem;font-weight:700;color:#111827;margin-bottom:.2rem}
.timeline-content p{font-size:.82rem;color:var(--text-body)}

/* --- Footer --- */
.site-footer{
  background:#7c2d12;color:rgba(255,255,255,.8);padding:3rem 0 1.5rem;
}
.footer-grid{display:grid;grid-template-columns:1fr;gap:2rem;margin-bottom:2rem}
@media(min-width:640px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr}}
.footer-brand .logo{font-size:1.1rem;font-weight:800;color:#fff}
.footer-brand p{font-size:.82rem;margin-top:.5rem;line-height:1.5;color:rgba(255,255,255,.6)}
.footer-col h4{font-size:.9rem;font-weight:700;color:#fff;margin-bottom:.75rem}
.footer-col a{display:block;font-size:.82rem;color:rgba(255,255,255,.6);text-decoration:none;margin-bottom:.4rem;transition:color .2s}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding-top:1.25rem;
  display:flex;flex-direction:column;align-items:center;gap:.75rem;
}
@media(min-width:640px){.footer-bottom{flex-direction:row;justify-content:space-between}}
.footer-bottom p{font-size:.78rem;color:rgba(255,255,255,.45)}
.footer-social{display:flex;gap:.6rem}
.footer-social a{
  width:32px;height:32px;border-radius:999px;
  background:rgba(255,255,255,.08);color:rgba(255,255,255,.6);
  display:flex;align-items:center;justify-content:center;text-decoration:none;font-size:.85rem;
  transition:all .2s;
}
.footer-social a:hover{background:var(--accent);color:#1f2937}

/* --- Grid-5 special --- */
.grid-5{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}
@media(min-width:640px){.grid-5{grid-template-columns:repeat(5,1fr)}}

/* --- Warning / Info Card --- */
.info-card{
  background:rgba(234,88,12,.03);border:1px solid rgba(234,88,12,.2);
  border-radius:var(--radius);padding:1.5rem;
}

/* --- Back to Top --- */
.back-top{
  position:fixed;bottom:1.5rem;right:1.5rem;
  width:44px;height:44px;border-radius:999px;
  background:var(--primary);color:#fff;border:none;
  display:flex;align-items:center;justify-content:center;
  cursor:pointer;font-size:1rem;box-shadow:var(--shadow-md);
  opacity:0;visibility:hidden;transition:all .3s;z-index:99;
}
.back-top.visible{opacity:1;visibility:visible}

/* --- Reveal Animation --- */
.reveal{opacity:0;transform:translateY(24px);transition:all .6s ease}
.reveal.visible{opacity:1;transform:translateY(0)}

/* --- Brand Strip --- */
.brand-strip{display:flex;flex-wrap:wrap;justify-content:center;gap:1.5rem;align-items:center}
.brand-strip span{
  font-size:.85rem;padding:.35rem 1rem;background:var(--bg-card);
  border:1px solid var(--border-card);border-radius:var(--radius-full);
  color:var(--text-body);font-weight:500;
}

/* --- Download Card (gradient) --- */
.download-card{
  background:linear-gradient(135deg,#ea580c 0%,#c2410c 40%,#9a3412 100%);
  border-radius:1.5rem;padding:2.5rem 1.5rem;color:#fff;text-align:center;
}
@media(min-width:768px){.download-card{padding:3rem 3.5rem}}

/* --- Scrollbar --- */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:#ffedd5}
::-webkit-scrollbar-thumb{background:var(--primary);border-radius:3px}

/* --- Selection --- */
::selection{background:rgba(234,88,12,.2)}