/* ============================================================
 * SPARK 火花服 · 样式文件
 * 配色（工业橙 × 白）：
 *   --orange  主色橙（取自 logo）
 *   --yellow  点缀黄（取自 logo 顶面）
 *   --dark    深炭灰
 *   --light   米白
 * ============================================================ */

:root {
  --orange: #f5511c;
  --orange-dark: #d63f0e;
  --yellow: #f7b512;
  --dark: #1a1816;
  --dark-2: #242019;
  --light: #faf8f5;
  --gray: #8a857e;
  --font-main: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", Consolas, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background: var(--light);
  color: var(--dark);
  line-height: 1.7;
  overflow-x: hidden;
}

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 通用区块 ---------- */
section { padding: 96px 0; position: relative; }

.section-light { background: var(--light); }
.section-dark { background: var(--dark); color: var(--light); }

.section-tag {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--orange);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.section-dark .section-tag { color: var(--yellow); }

h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: 2px;
  margin-bottom: 14px;
}

.section-sub {
  color: var(--gray);
  font-size: 16px;
  margin-bottom: 40px;
}

.section-dark .section-sub { color: #b8b2a9; }

/* 警示条纹（工业感装饰） */
.hero-stripe {
  height: 12px;
  background: repeating-linear-gradient(
    -45deg,
    var(--orange) 0 24px,
    var(--dark) 24px 48px
  );
}

.section-light + section .hero-stripe,
.section-dark .hero-stripe {
  position: absolute;
  left: 0; right: 0; bottom: 0;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 13px 38px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 2px;
  text-decoration: none;
  border: 3px solid var(--orange);
  color: var(--orange);
  background: transparent;
  transition: all .2s ease;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
}

.btn:hover {
  background: var(--orange);
  color: #fff;
  transform: translateY(-2px);
}

.btn-solid {
  background: var(--orange);
  color: #fff;
}

.btn-solid:hover { background: var(--orange-dark); }

/* ---------- 导航栏 ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  background: rgba(26, 24, 22, .92);
  backdrop-filter: blur(8px);
  border-bottom: 3px solid var(--orange);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #fff;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 2px;
}

.nav-brand img { width: 34px; height: 34px; }

.nav-brand small {
  color: var(--yellow);
  font-size: 12px;
  font-weight: 600;
  margin-left: 6px;
  letter-spacing: 4px;
}

.nav-links { display: flex; align-items: center; gap: 28px; }

.nav-links a {
  color: #ddd;
  text-decoration: none;
  font-size: 15px;
  letter-spacing: 1px;
  transition: color .2s;
}

.nav-links a:hover { color: var(--yellow); }

.nav-links .nav-cta {
  background: var(--orange);
  color: #fff;
  padding: 8px 20px;
  font-weight: 700;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.nav-links .nav-cta:hover { background: var(--orange-dark); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 24px;
  cursor: pointer;
}

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--light);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url("../images/hero-bg.jpg") center/cover no-repeat var(--dark);
  filter: brightness(.9);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(26,24,22,.55), rgba(26,24,22,.85));
}

.hero-inner { position: relative; z-index: 2; padding: 120px 24px 80px; }

.hero-icon {
  width: 110px;
  height: 110px;
  margin: 0 auto 18px;
  filter: drop-shadow(0 6px 24px rgba(245, 81, 28, .45));
}

.hero-title {
  font-size: clamp(56px, 11vw, 120px);
  font-weight: 900;
  letter-spacing: 12px;
  line-height: 1;
  color: #fff;
  text-shadow: 4px 4px 0 var(--orange);
}

.hero-fullname {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 3px;
  color: var(--yellow);
  margin-top: 16px;
  text-transform: uppercase;
}

.hero-subtitle {
  font-size: clamp(16px, 2.4vw, 22px);
  color: #e8e2d9;
  margin-top: 14px;
  font-style: italic;
}

.hero-buttons {
  margin-top: 36px;
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero .btn { border-color: var(--yellow); color: var(--yellow); }
.hero .btn:hover { background: var(--yellow); color: var(--dark); }

.hero-note {
  margin-top: 22px;
  font-size: 14px;
  color: #9d968c;
  letter-spacing: 2px;
}

/* ---------- 关于我们 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 60px;
  align-items: center;
}

.about-logo img {
  width: 100%;
  max-width: 380px;
  margin: 0 auto;
  border: 4px solid var(--dark);
  box-shadow: 12px 12px 0 var(--orange);
}

.about-text p {
  margin-bottom: 14px;
  color: #45403a;
  font-size: 16px;
}

.about-text h2 { margin-bottom: 24px; }

/* ---------- 画廊 ---------- */
.uptime {
  font-family: var(--font-mono);
  color: var(--yellow);
  font-size: 15px;
  letter-spacing: 2px;
  margin-bottom: 28px;
}

.carousel {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}

.carousel-track { position: relative; height: 460px; }

.carousel-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity .8s ease;
  border: 4px solid var(--orange);
}

.carousel-slide.active { opacity: 1; z-index: 2; }

.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: var(--dark);
}

.carousel-caption {
  position: absolute;
  left: 0; bottom: 0;
  background: rgba(26, 24, 22, .85);
  color: var(--yellow);
  padding: 8px 20px;
  font-size: 14px;
  letter-spacing: 2px;
  z-index: 3;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 5;
  width: 48px;
  height: 48px;
  border: none;
  background: var(--orange);
  color: #fff;
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
  transition: background .2s;
}

.carousel-btn:hover { background: var(--yellow); color: var(--dark); }
.carousel-btn.prev { left: -24px; }
.carousel-btn.next { right: -24px; }

.carousel-dots {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-top: 22px;
}

.carousel-dots button {
  width: 34px;
  height: 6px;
  border: none;
  background: #4a453e;
  cursor: pointer;
  transition: background .2s;
}

.carousel-dots button.active { background: var(--orange); }

/* ---------- 硬件支持 ---------- */
.hw-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 24px;
}

.hw-card {
  background: #fff;
  border: 3px solid var(--dark);
  padding: 34px 26px;
  text-align: center;
  transition: transform .2s, box-shadow .2s;
  position: relative;
}

.hw-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 8px;
  background: repeating-linear-gradient(-45deg, var(--orange) 0 14px, transparent 14px 28px);
}

.hw-card:hover {
  transform: translateY(-6px);
  box-shadow: 8px 8px 0 var(--orange);
}

.hw-icon { width: 56px; height: 56px; margin: 8px auto 18px; }

.hw-card h4 {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 1px;
  margin-bottom: 10px;
  color: var(--orange);
}

.hw-card p { font-size: 14px; color: #6b665e; }

/* ---------- 管理团队 ---------- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 22px;
}

.team-card {
  background: var(--dark-2);
  border: 3px solid #3a352e;
  padding: 28px 16px 22px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, transform .2s;
  text-decoration: none;
  color: inherit;
  display: block;
}

.team-card:hover {
  border-color: var(--orange);
  transform: translateY(-6px);
}

.team-avatar {
  width: 96px;
  height: 96px;
  margin: 0 auto 16px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--orange);
  color: #fff;
  font-size: 32px;
  font-weight: 800;
  position: relative;
  z-index: 2;
}

/* 有图片时：去掉底色和圆形裁剪，完整展示头像，且头像位于最上层 */
.team-avatar:has(img) {
  background: transparent;
  border-radius: 0;
}

.team-avatar img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  position: relative;
  z-index: 3;
}

.team-card h3 { font-size: 18px; font-weight: 800; color: #fff; letter-spacing: 1px; }
.team-card p { font-size: 13px; color: var(--yellow); margin-top: 6px; }

/* ---------- 加入我们 ---------- */
.join {
  background: var(--orange);
  color: #fff;
  text-align: center;
  padding: 80px 0;
}

.join h2 { letter-spacing: 4px; }
.join p { margin: 12px 0 30px; font-size: 17px; }

.join .btn {
  border-color: #fff;
  color: #fff;
}

.join .btn:hover { background: #fff; color: var(--orange); }

/* ---------- 页脚 ---------- */
.footer {
  background: var(--dark);
  color: #b8b2a9;
  padding: 60px 0 40px;
}

.footer-grid {
  display: flex;
  gap: 40px;
  align-items: center;
  flex-wrap: wrap;
}

.footer-logo img {
  width: 130px;
  background: #fff;
  padding: 10px;
  border: 3px solid var(--orange);
}

.footer-info h3 {
  color: #fff;
  font-size: 22px;
  letter-spacing: 2px;
  margin-bottom: 10px;
}

.footer-info p { font-size: 14px; margin-bottom: 4px; }

.footer .container { border-top: 1px solid #3a352e; padding-top: 36px; }

/* ---------- 响应式 ---------- */
@media (max-width: 820px) {
  .nav-toggle { display: block; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    background: rgba(26, 24, 22, .97);
    padding: 20px 0;
    gap: 16px;
    border-bottom: 3px solid var(--orange);
  }

  .nav-links.open { display: flex; }

  .about-grid { grid-template-columns: 1fr; gap: 40px; }

  .carousel-track { height: 300px; }
  .carousel-btn.prev { left: 8px; }
  .carousel-btn.next { right: 8px; }

  section { padding: 64px 0; }
}