/* AITradePath · Sports Showroom — 体育主题，能量感配色，纯静态 */
:root {
  --ink: #0e1726;
  --ink-soft: #475068;
  --line: #e6e9f0;
  --bg: #ffffff;
  --bg-soft: #f5f7fb;
  --accent: #0a4dff;      /* electric blue */
  --accent-2: #00d68f;    /* energy green */
  --accent-warm: #ff5a1f; /* sport orange */
  --shadow: 0 18px 48px rgba(14, 23, 38, 0.12);
  --shadow-sm: 0 6px 18px rgba(14, 23, 38, 0.08);
  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { font-family: "Sora", "Inter", sans-serif; letter-spacing: -0.02em; margin: 0; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; font-weight: 600; font-size: 0.95rem;
  padding: 13px 22px; border-radius: 999px; border: 1.5px solid transparent;
  cursor: pointer; transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 9px 18px; font-size: 0.9rem; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 10px 24px rgba(10, 77, 255, 0.28); }
.btn-primary:hover { background: #003fe0; box-shadow: 0 12px 28px rgba(10, 77, 255, 0.36); }
.btn-outline { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-outline:hover { border-color: var(--ink); }
.btn-ghost { background: var(--bg-soft); color: var(--ink); font-size: 0.88rem; padding: 10px 16px; }
.btn-ghost:hover { background: #eaeef6; }

/* ---------- 顶栏 ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; gap: 20px;
  padding: 14px clamp(16px, 5vw, 48px);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 800; font-family: "Sora", sans-serif; font-size: 1.18rem; }
.brand-mark { color: var(--accent); transform: rotate(0deg); }
.brand-tag {
  font-size: 0.62rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: #fff; background: var(--accent-warm); padding: 3px 7px; border-radius: 6px; margin-left: 2px;
}
.nav-links { margin-left: auto; display: flex; gap: 26px; font-weight: 500; color: var(--ink-soft); }
.nav-links a:hover { color: var(--ink); }
.nav .btn { margin-left: 4px; }

/* ---------- 英雄区 ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: clamp(56px, 9vw, 110px) clamp(16px, 5vw, 48px) clamp(48px, 7vw, 90px);
  background:
    radial-gradient(1100px 500px at 85% -10%, rgba(0, 214, 143, 0.16), transparent 60%),
    radial-gradient(900px 500px at -5% 110%, rgba(10, 77, 255, 0.14), transparent 55%),
    linear-gradient(180deg, #fbfcff, #f3f6fc);
}
.hero-inner { max-width: var(--maxw); margin: 0 auto; }
.eyebrow {
  display: inline-block; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--accent); background: rgba(10, 77, 255, 0.08);
  padding: 7px 14px; border-radius: 999px; margin-bottom: 22px;
}
.hero h1 { font-size: clamp(2.2rem, 6vw, 4.1rem); line-height: 1.04; font-weight: 800; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero-sub { max-width: 560px; margin: 22px 0 30px; font-size: clamp(1rem, 2.2vw, 1.18rem); color: var(--ink-soft); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 38px; margin-top: 52px; }
.hero-stats div { display: flex; flex-direction: column; }
.hero-stats strong { font-family: "Sora", sans-serif; font-size: 1.5rem; }
.hero-stats span { font-size: 0.86rem; color: var(--ink-soft); }

/* ---------- 区块通用 ---------- */
section { scroll-margin-top: 72px; }
.section-head { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(16px, 5vw, 48px); text-align: center; }
.section-head h2 { font-size: clamp(1.7rem, 4vw, 2.6rem); }
.section-head p { color: var(--ink-soft); margin-top: 10px; }

/* ---------- 目录 + 筛选 ---------- */
.catalog { padding: clamp(56px, 8vw, 92px) 0; }
.filter-bar {
  max-width: var(--maxw); margin: 30px auto 36px; padding: 0 clamp(16px, 5vw, 48px);
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: center;
}
.chip {
  border: 1.5px solid var(--line); background: #fff; color: var(--ink-soft);
  padding: 9px 18px; border-radius: 999px; font-weight: 600; font-size: 0.9rem; cursor: pointer;
  transition: all 0.12s ease;
}
.chip:hover { border-color: var(--ink); color: var(--ink); }
.chip.is-active { background: var(--ink); color: #fff; border-color: var(--ink); }

.product-grid {
  max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(16px, 5vw, 48px);
  display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 24px;
}
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; cursor: pointer; transition: transform 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
  display: flex; flex-direction: column;
}
.card:hover, .card:focus-visible {
  transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; outline: none;
}
.card-img { background: var(--bg-soft); aspect-ratio: 4 / 3; display: flex; align-items: center; justify-content: center; padding: 12px; }
.card-img img { width: 100%; height: 100%; object-fit: contain; mix-blend-mode: multiply; }
.card-body { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.03em; text-transform: uppercase;
  color: var(--accent); background: rgba(10, 77, 255, 0.08); padding: 3px 8px; border-radius: 6px;
}
.card-name { font-size: 1.08rem; font-weight: 700; }
.card-sub { font-size: 0.85rem; color: var(--ink-soft); margin: 0; }
.card-foot { margin-top: auto; padding-top: 10px; display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--line); }
.card-model { font-size: 0.76rem; color: var(--ink-soft); font-weight: 600; letter-spacing: 0.04em; }
.card-cta { font-size: 0.85rem; font-weight: 700; color: var(--accent); }

/* ---------- 关于 ---------- */
.about { background: var(--bg-soft); padding: clamp(56px, 8vw, 92px) clamp(16px, 5vw, 48px); }
.about-inner { max-width: var(--maxw); margin: 0 auto; display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; align-items: start; }
.about-text h2 { font-size: clamp(1.7rem, 4vw, 2.4rem); margin-bottom: 16px; }
.about-text p { color: var(--ink-soft); margin: 0 0 20px; max-width: 540px; }
.about-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 14px; }
.about-list li { position: relative; padding-left: 30px; color: var(--ink-soft); }
.about-list li::before {
  content: "✓"; position: absolute; left: 0; top: 1px;
  color: var(--accent-2); font-weight: 800; background: rgba(0, 214, 143, 0.14);
  width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; font-size: 0.78rem;
}
.about-list strong { color: var(--ink); }
.about-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-sm); }
.about-card h3 { font-size: 1.2rem; margin-bottom: 18px; }
.steps { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 16px; counter-reset: s; }
.steps li { display: flex; align-items: flex-start; gap: 14px; color: var(--ink-soft); font-size: 0.94rem; }
.steps li span {
  flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent); color: #fff; font-weight: 700; display: grid; place-items: center; font-size: 0.85rem;
}

/* ---------- 联系 ---------- */
.contact { padding: clamp(56px, 8vw, 92px) clamp(16px, 5vw, 48px); text-align: center; }
.contact-inner { max-width: 880px; margin: 0 auto; }
.contact h2 { font-size: clamp(1.8rem, 4.5vw, 2.8rem); }
.contact > .contact-inner > p { color: var(--ink-soft); margin: 12px 0 34px; }
.contact-methods { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.contact-card {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 18px;
  display: flex; flex-direction: column; align-items: center; gap: 6px; background: #fff;
  transition: transform 0.14s ease, box-shadow 0.14s ease, border-color 0.14s ease;
}
.contact-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); border-color: var(--accent); }
.contact-ico { font-size: 1.7rem; }
.contact-label { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-soft); font-weight: 700; }
.contact-value { font-weight: 700; font-size: 1rem; }

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--line); padding: 26px clamp(16px, 5vw, 48px);
  display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between;
  color: var(--ink-soft); font-size: 0.86rem; max-width: var(--maxw); margin: 0 auto;
}

/* ---------- 详情弹窗 ---------- */
.modal {
  position: fixed; inset: 0; z-index: 200; display: none;
  background: rgba(14, 23, 38, 0.55); backdrop-filter: blur(4px);
  padding: clamp(12px, 4vw, 40px); overflow-y: auto;
}
.modal.is-open { display: flex; align-items: flex-start; justify-content: center; }
.modal-panel {
  position: relative; background: #fff; border-radius: var(--radius); width: min(880px, 100%);
  box-shadow: var(--shadow); margin: auto; animation: pop 0.18s ease;
}
@keyframes pop { from { transform: translateY(14px) scale(0.98); opacity: 0; } to { transform: none; opacity: 1; } }
.modal-close {
  position: absolute; top: 14px; right: 14px; z-index: 2;
  width: 36px; height: 36px; border-radius: 50%; border: none; background: var(--bg-soft);
  font-size: 1rem; cursor: pointer; color: var(--ink-soft);
}
.modal-close:hover { background: #e6eaf2; color: var(--ink); }
.modal-grid { display: grid; grid-template-columns: 1.05fr 1fr; }
.modal-img { background: var(--bg-soft); border-radius: var(--radius) 0 0 var(--radius); display: flex; align-items: center; padding: 28px; }
.modal-img img { width: 100%; object-fit: contain; mix-blend-mode: multiply; }
.modal-info { padding: 32px 30px; }
.modal-info h2 { font-size: 1.7rem; margin: 10px 0 8px; }
.modal-tagline { color: var(--ink-soft); margin: 0 0 20px; }
.spec { width: 100%; border-collapse: collapse; margin-bottom: 18px; }
.spec th, .spec td { text-align: left; padding: 9px 0; border-bottom: 1px solid var(--line); font-size: 0.92rem; vertical-align: top; }
.spec th { color: var(--ink-soft); font-weight: 600; width: 38%; }
.spec td { font-weight: 600; }
.swatches { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 18px; }
.swatch { font-size: 0.8rem; border: 1px solid var(--line); background: var(--bg-soft); padding: 5px 11px; border-radius: 999px; color: var(--ink); }
.moq-note { font-size: 0.84rem; color: var(--ink-soft); background: rgba(0, 214, 143, 0.08); border-left: 3px solid var(--accent-2); padding: 11px 14px; border-radius: 0 8px 8px 0; margin: 0 0 22px; }
.modal-cta { display: flex; flex-wrap: wrap; gap: 10px; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  .about-inner { grid-template-columns: 1fr; gap: 32px; }
  .modal-grid { grid-template-columns: 1fr; }
  .modal-img { border-radius: var(--radius) var(--radius) 0 0; }
  .contact-methods { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero-stats { gap: 24px; }
}