/* ============ OUCHI — style.css ============ */
/* 深色高端汽车运动风格 / 无外部字体依赖，全球加载快 */

:root {
  --bg: #0d0f12;
  --bg-alt: #12151a;
  --panel: #181c23;
  --line: #262c36;
  --text: #e8eaee;
  --text-dim: #9aa3af;
  --accent: #d4ad62;
  --accent-hover: #e8c988;
  --radius: 14px;
  --max-w: 1140px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 780px; }

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; }

h1 { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.2rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 700; }

.accent { color: var(--accent); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(13, 15, 18, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.logo-img {
  width: 40px; height: 40px; border-radius: 50%;
  object-fit: cover; box-shadow: 0 0 0 1px rgba(212, 173, 98, 0.35);
}
.logo-text { font-weight: 800; font-size: 1.25rem; letter-spacing: 0.08em; }

.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav a {
  color: var(--text-dim); text-decoration: none; font-size: 0.95rem; font-weight: 500;
  transition: color 0.2s;
}
.main-nav a:hover { color: var(--text); }
.main-nav .nav-cta {
  color: #fff; background: var(--accent);
  padding: 9px 18px; border-radius: 9px; font-weight: 600;
}
.main-nav .nav-cta:hover { background: var(--accent-hover); }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; cursor: pointer; padding: 8px;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; }

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 72px;
  background:
    radial-gradient(ellipse 60% 45% at 70% 0%, rgba(212, 173, 98, 0.16), transparent 70%),
    radial-gradient(ellipse 45% 40% at 15% 20%, rgba(255, 255, 255, 0.04), transparent 70%),
    var(--bg);
}
.hero-eyebrow {
  color: var(--accent); font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; font-size: 0.8rem; margin-bottom: 18px;
}
.hero h1 { margin-bottom: 22px; }
.hero-sub {
  color: var(--text-dim); font-size: 1.1rem; max-width: 640px; margin-bottom: 34px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 52px; }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  list-style: none; border-top: 1px solid var(--line); padding-top: 28px; max-width: 640px;
}
.hero-stats strong { display: block; font-size: 1.5rem; font-weight: 800; }
.hero-stats span { color: var(--text-dim); font-size: 0.85rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 24px; border-radius: 10px;
  font-weight: 600; font-size: 0.98rem; text-decoration: none;
  transition: background 0.2s, transform 0.15s;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost {
  color: var(--text); border: 1px solid var(--line); background: transparent;
}
.btn-ghost:hover { border-color: var(--text-dim); }
.btn-sm { padding: 10px 18px; font-size: 0.9rem; }

/* ---------- Sections ---------- */
.section { padding: 84px 0; }
.section-alt { background: var(--bg-alt); }
.section-eyebrow {
  color: var(--accent); font-weight: 700; letter-spacing: 0.14em;
  text-transform: uppercase; font-size: 0.78rem; margin-bottom: 12px;
}
.section-title { margin-bottom: 14px; }
.section-sub { color: var(--text-dim); max-width: 620px; margin-bottom: 44px; }

/* ---------- About ---------- */
.about-grid {
  display: grid; grid-template-columns: 1.3fr 1fr; gap: 56px; align-items: start;
}
.about-text p { color: var(--text-dim); margin-bottom: 16px; }
.about-text h2 { margin-bottom: 20px; }
.check-list { list-style: none; margin-top: 24px; }
.check-list li {
  padding-left: 30px; position: relative; margin-bottom: 12px; color: var(--text);
}
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  color: var(--accent); font-weight: 800;
}
.about-card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden;
}
.about-photo {
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); margin-bottom: 18px;
  background: #fff;
}
.about-photo img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; }
.about-card-item { padding: 26px 28px; }
.about-card-item + .about-card-item { border-top: 1px solid var(--line); }
.about-card-item h3 { color: var(--accent); font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 8px; }
.about-card-item p { color: var(--text-dim); font-size: 0.95rem; }

/* ---------- Products ---------- */
.product-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px;
}
.product-card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden;
  transition: transform 0.2s, border-color 0.2s;
}
.product-card:hover { transform: translateY(-4px); border-color: #3a4250; }
.product-media { aspect-ratio: 4 / 3; background: var(--bg-alt); }
.product-media img { width: 100%; height: 100%; object-fit: cover; }
.product-body { padding: 24px; }
.product-tagline { color: var(--accent); font-size: 0.88rem; font-weight: 600; margin: 4px 0 14px; }
.product-body ul { list-style: none; }
.product-body ul li {
  color: var(--text-dim); font-size: 0.92rem;
  padding-left: 18px; position: relative; margin-bottom: 7px;
}
.product-body ul li::before {
  content: "—"; position: absolute; left: 0; color: var(--accent);
}
.product-card-cta {
  display: flex; align-items: center;
  background: linear-gradient(135deg, rgba(212,173,98,0.14), rgba(212,173,98,0.03)), var(--panel);
  border-color: rgba(212,173,98,0.4);
}
.product-card-cta p { color: var(--text-dim); font-size: 0.95rem; margin-bottom: 20px; }

/* ---------- Craftsmanship ---------- */
.craft-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px;
  margin-top: 40px;
}
.craft-step {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px;
}
.craft-num {
  display: inline-block; color: var(--accent); font-weight: 800;
  font-size: 1.4rem; margin-bottom: 12px;
}
.craft-step h3 { margin-bottom: 10px; }
.craft-step p { color: var(--text-dim); font-size: 0.93rem; }

/* ---------- Why ---------- */
.why-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px;
  margin-top: 40px;
}
.why-item {
  padding: 26px 28px; border-left: 3px solid var(--accent);
  background: var(--panel); border-radius: 0 var(--radius) var(--radius) 0;
}
.why-item h3 { margin-bottom: 8px; font-size: 1.05rem; }
.why-item p { color: var(--text-dim); font-size: 0.93rem; }

/* ---------- FAQ ---------- */
.faq-item {
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--panel); margin-bottom: 12px; padding: 0 22px;
}
.faq-item summary {
  cursor: pointer; font-weight: 600; padding: 18px 0; list-style: none;
  position: relative; padding-right: 32px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  color: var(--accent); font-size: 1.4rem; font-weight: 400;
}
.faq-item[open] summary::after { content: "−"; }
.faq-item p { color: var(--text-dim); padding-bottom: 18px; font-size: 0.95rem; }

/* ---------- Contact ---------- */
.section-cta {
  background:
    radial-gradient(ellipse 55% 60% at 50% 100%, rgba(212, 173, 98, 0.14), transparent 70%),
    var(--bg-alt);
  text-align: center;
}
.contact-inner .section-sub { margin-left: auto; margin-right: auto; }
.contact-cards {
  display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin-bottom: 26px;
}
.contact-card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 34px; min-width: 220px;
  text-decoration: none; color: var(--text);
  transition: transform 0.2s, border-color 0.2s;
}
.contact-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.contact-card h3 { color: var(--accent); font-size: 0.88rem; text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 8px; }
.contact-card p { font-weight: 600; }
.contact-note { color: var(--text-dim); font-size: 0.88rem; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: var(--bg); padding: 48px 0 28px; }
.footer-inner {
  display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; margin-bottom: 36px;
}
.footer-brand p { color: var(--text-dim); font-size: 0.9rem; margin-top: 10px; }
.footer-nav { display: flex; gap: 22px; flex-wrap: wrap; align-content: flex-start; }
.footer-nav a { color: var(--text-dim); text-decoration: none; font-size: 0.92rem; }
.footer-nav a:hover { color: var(--text); }
.footer-bottom { border-top: 1px solid var(--line); padding-top: 22px; }
.footer-bottom p { color: var(--text-dim); font-size: 0.82rem; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .main-nav {
    display: none;
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 10px 24px 20px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 13px 0; border-bottom: 1px solid var(--line); }
  .main-nav .nav-cta { margin-top: 14px; text-align: center; border-bottom: 0; }
  .nav-toggle { display: flex; }
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero { padding: 64px 0 56px; }
  .section { padding: 64px 0; }
}

@media (max-width: 560px) {
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .contact-card { width: 100%; }
}