/* ============================================
   哥得圣电动车 · 官方网站样式
   广州市哥得圣电动车有限公司
   ============================================ */

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

:root {
  --red:       #e53935;
  --red-dark:  #b71c1c;
  --red-light: #ff6b6b;
  --gold:      #ff9800;
  --dark:      #0a0303;
  --dark2:     #120505;
  --dark3:     #1a0808;
  --dark4:     #2d0a0a;
  --text:      #f0e6e6;
  --text-muted:#b08080;
  --border:    rgba(229,57,53,.14);
  --card:      rgba(26,8,8,.6);
  --gradient:  linear-gradient(135deg, #e53935 0%, #c62828 100%);
  --font:      'Noto Sans SC', 'Inter', -apple-system, sans-serif;
  --radius:    14px;
  --shadow:    0 20px 60px rgba(0,0,0,.5);
  --tr:        .3s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--dark);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }

/* ========== 顶部公告条 ========== */
.topbar {
  background: var(--red-dark);
  color: rgba(255,255,255,.88);
  font-size: .78rem;
  padding: 7px 0;
}
.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.topbar i { margin-right: 5px; opacity: .85; }
.topbar-sep { opacity: .4; }

/* ========== 容器 ========== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ========== 导航栏 ========== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 900;
  padding: 0;
  background: rgba(10,3,3,.9);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  transition: all var(--tr);
}
.navbar.scrolled { background: rgba(10,3,3,.97); }
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  height: 68px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark svg { display: block; flex-shrink: 0; }
.logo-text-wrap {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.logo-cn {
  font-size: 1.15rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: .5px;
}
.logo-en {
  font-size: .55rem;
  font-weight: 600;
  color: var(--red-light);
  letter-spacing: 1.5px;
}

/* 导航链接 */
.nav-links {
  display: flex;
  list-style: none;
  gap: 2px;
  margin-left: auto;
}
.nav-links a {
  padding: 8px 15px;
  border-radius: 8px;
  color: var(--text-muted);
  font-size: .9rem;
  font-weight: 500;
  transition: all var(--tr);
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); background: rgba(229,57,53,.1); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: 12px;
}
.btn-consult {
  background: var(--gradient);
  color: #fff;
  padding: 9px 20px;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 700;
  transition: all var(--tr);
  box-shadow: 0 4px 16px rgba(229,57,53,.3);
  white-space: nowrap;
}
.btn-consult i { margin-right: 6px; }
.btn-consult:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(229,57,53,.45); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--tr);
}

/* ========== Hero ========== */
.hero {
  min-height: calc(100vh - 34px - 68px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 60px 64px 80px;
  gap: 40px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(229,57,53,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(229,57,53,.04) 1px, transparent 1px);
  background-size: 50px 50px;
}
.hero-bg-glow {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  width: 55vw;
  height: 55vw;
  background: radial-gradient(ellipse, rgba(229,57,53,.1) 0%, transparent 65%);
}

.hero-left { position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 16px 6px 12px;
  background: rgba(229,57,53,.1);
  border: 1px solid rgba(229,57,53,.3);
  border-radius: 50px;
  font-size: .8rem;
  font-weight: 600;
  color: var(--red-light);
  margin-bottom: 24px;
}
.badge-dot {
  width: 7px;
  height: 7px;
  background: var(--red);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--red);
  animation: dotPulse 1.5s ease-in-out infinite;
}
@keyframes dotPulse {
  0%,100%{ box-shadow:0 0 4px var(--red); }
  50%{ box-shadow:0 0 12px var(--red),0 0 20px rgba(229,57,53,.4); }
}

.hero-title {
  font-size: clamp(2.4rem, 4.5vw, 4rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
}
.hero-title em {
  font-style: normal;
  color: var(--red);
}

.hero-sub {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 36px;
  max-width: 460px;
}

.hero-btns {
  display: flex;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.btn-red {
  background: var(--gradient);
  color: #fff;
  padding: 13px 30px;
  border-radius: 50px;
  font-weight: 700;
  font-size: .95rem;
  transition: all var(--tr);
  box-shadow: 0 8px 24px rgba(229,57,53,.35);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-red:hover { transform: translateY(-3px); box-shadow: 0 14px 36px rgba(229,57,53,.5); }
.btn-red.mt20 { margin-top: 24px; }
.btn-ghost {
  border: 2px solid rgba(229,57,53,.35);
  color: var(--red-light);
  padding: 13px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: .95rem;
  transition: all var(--tr);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-ghost:hover { background: rgba(229,57,53,.1); border-color: var(--red); transform: translateY(-2px); }

.hero-certs {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.cert-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  background: rgba(229,57,53,.08);
  border: 1px solid rgba(229,57,53,.18);
  border-radius: 6px;
  font-size: .75rem;
  color: var(--text-muted);
}
.cert-item i { color: var(--gold); }

/* Hero 右侧 */
.hero-right {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
}
.hero-bike-wrap {
  position: relative;
  width: 100%;
  max-width: 600px;
}
.hero-glow-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  width: 420px;
  height: 320px;
  background: radial-gradient(ellipse, rgba(229,57,53,.14) 0%, transparent 65%);
  pointer-events: none;
  animation: glowPulse 3.5s ease-in-out infinite;
}
@keyframes glowPulse {
  0%,100%{ opacity:.7; transform:translate(-50%,-50%) scale(1); }
  50%{ opacity:1; transform:translate(-50%,-50%) scale(1.08); }
}
.hero-bike-svg {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 20px 50px rgba(229,57,53,.2));
  animation: floatBike 4.5s ease-in-out infinite;
}
@keyframes floatBike {
  0%,100%{ transform: translateY(0); }
  50%{ transform: translateY(-14px); }
}
.float-label {
  position: absolute;
  background: rgba(26,8,8,.92);
  border: 1px solid rgba(229,57,53,.3);
  backdrop-filter: blur(10px);
  padding: 7px 14px;
  border-radius: 50px;
  font-size: .78rem;
  font-weight: 600;
  color: var(--red-light);
  white-space: nowrap;
  box-shadow: 0 6px 20px rgba(0,0,0,.3);
}
.float-label i { margin-right: 6px; }
.fl1 { top: 8%; left: -2%; animation: floatTag 3s ease-in-out infinite; }
.fl2 { top: 48%; right: -4%; animation: floatTag 3s ease-in-out 1s infinite; }
.fl3 { bottom: 14%; left: 4%; animation: floatTag 3s ease-in-out 2s infinite; }
@keyframes floatTag { 0%,100%{ transform:translateY(0); } 50%{ transform:translateY(-7px); } }

.scroll-down {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: .72rem;
  z-index: 1;
  animation: scrollBounce 2s ease-in-out infinite;
}
.scroll-line {
  width: 1px;
  height: 30px;
  background: linear-gradient(to bottom, transparent, var(--red));
}
@keyframes scrollBounce {
  0%,100%{ transform:translateX(-50%) translateY(0); }
  50%{ transform:translateX(-50%) translateY(6px); }
}

/* ========== 品牌数字条 ========== */
.brand-bar {
  background: var(--dark3);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 48px 0;
}
.brand-bar-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
}
.bb-item {
  text-align: center;
  padding: 8px 48px;
  flex: 1;
}
.bb-sep {
  width: 1px;
  height: 50px;
  background: var(--border);
  flex-shrink: 0;
}
.bb-num {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--red);
  letter-spacing: -1.5px;
}
.bb-unit {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--red-light);
}
.bb-desc {
  display: block;
  font-size: .8rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ========== Section 通用标题 ========== */
section { padding: 90px 0; }
.sec-hd { text-align: center; margin-bottom: 56px; }
.sec-tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(229,57,53,.1);
  border: 1px solid rgba(229,57,53,.22);
  border-radius: 50px;
  font-size: .72rem;
  font-weight: 700;
  color: var(--red);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.sec-hd h2 {
  font-size: clamp(1.7rem, 2.8vw, 2.5rem);
  font-weight: 900;
  letter-spacing: -.8px;
  margin-bottom: 10px;
}
.sec-hd p { font-size: .95rem; color: var(--text-muted); }
.sec-hd.light h2,
.sec-hd.light p { color: var(--text); }

/* ========== 产品系列 ========== */
.products { background: var(--dark2); }

.tabs-wrap { display: flex; justify-content: center; margin-bottom: 40px; }
.tabs {
  display: flex;
  background: rgba(26,8,8,.8);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 5px;
  gap: 4px;
}
.tab {
  padding: 10px 24px;
  border-radius: 50px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: .88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--tr);
  font-family: var(--font);
}
.tab.active,
.tab:hover { background: var(--gradient); color: #fff; box-shadow: 0 4px 14px rgba(229,57,53,.3); }

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.prod-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--tr);
  position: relative;
}
.prod-card:hover {
  transform: translateY(-7px);
  border-color: rgba(229,57,53,.3);
  box-shadow: 0 24px 60px rgba(229,57,53,.12);
}
.prod-card.featured {
  border-color: rgba(229,57,53,.4);
  background: linear-gradient(160deg, rgba(229,57,53,.07) 0%, var(--card) 100%);
}

.prod-img-box {
  position: relative;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 170px;
  border-radius: var(--radius) var(--radius) 0 0;
}
.city-c { background: linear-gradient(135deg, #1a0808, #2d0808); }
.city-b { background: linear-gradient(135deg, #0a0303, #1a0808); }
.city-a { background: linear-gradient(135deg, #1a0514, #2d0820); }
.sport-a { background: linear-gradient(135deg, #050a1a, #0d1a2d); }
.sport-b { background: linear-gradient(135deg, #051205, #0a1a0a); }
.cargo-a { background: linear-gradient(135deg, #1a0d05, #2d1a0a); }

.prod-img-box svg { max-height: 150px; width: 100%; }

.prod-tag {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 3px 10px;
  border-radius: 50px;
  font-size: .68rem;
  font-weight: 700;
  background: rgba(229,57,53,.2);
  border: 1px solid rgba(229,57,53,.35);
  color: var(--red-light);
  z-index: 2;
}
.prod-tag.hot { background: rgba(255,152,0,.18); border-color: rgba(255,152,0,.35); color: #ff9800; }
.prod-tag.flagship { background: rgba(229,57,53,.22); border-color: var(--red); color: #ff8a80; }
.prod-tag.new { background: rgba(76,175,80,.18); border-color: rgba(76,175,80,.3); color: #81c784; }
.prod-tag.sport { background: rgba(33,150,243,.18); border-color: rgba(33,150,243,.3); color: #64b5f6; }

.prod-body { padding: 18px 22px 22px; }
.prod-series {
  font-size: .72rem;
  color: var(--red);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-bottom: 5px;
}
.prod-body h3 { font-size: 1.15rem; font-weight: 800; margin-bottom: 6px; letter-spacing: -.3px; }
.prod-body > p { font-size: .84rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px; }

.prod-spec-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 10px;
  margin-bottom: 18px;
}
.prod-spec-list li {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .8rem;
  color: var(--text-muted);
}
.prod-spec-list i { color: var(--red); font-size: .75rem; width: 14px; }

.prod-price-row { display: flex; align-items: center; justify-content: space-between; }
.prod-price {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--red);
  letter-spacing: -.5px;
}
.btn-sm {
  padding: 7px 18px;
  border: 1.5px solid rgba(229,57,53,.4);
  color: var(--red-light);
  border-radius: 50px;
  font-size: .8rem;
  font-weight: 600;
  transition: all var(--tr);
}
.btn-sm:hover,
.btn-sm.red { background: var(--gradient); border-color: transparent; color: #fff; }
.btn-sm.red { box-shadow: 0 4px 14px rgba(229,57,53,.3); }

/* ========== 品牌优势 ========== */
.advantage { background: linear-gradient(180deg, var(--dark3) 0%, var(--dark4) 100%); }
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.adv-card {
  background: rgba(10,3,3,.55);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: all var(--tr);
  position: relative;
  overflow: hidden;
}
.adv-card::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--tr);
}
.adv-card:hover { transform: translateY(-5px); border-color: rgba(229,57,53,.25); }
.adv-card:hover::after { transform: scaleX(1); }
.adv-icon {
  width: 50px; height: 50px;
  background: rgba(229,57,53,.12);
  border: 1px solid rgba(229,57,53,.22);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  color: var(--red);
  margin-bottom: 18px;
}
.adv-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.adv-card p { font-size: .84rem; color: var(--text-muted); line-height: 1.7; }

/* ========== 合规区 ========== */
.compliance { background: var(--dark2); }
.comp-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.comp-left .sec-tag { display: inline-block; margin-bottom: 14px; }
.comp-left h2 { font-size: 2rem; font-weight: 900; margin-bottom: 16px; letter-spacing: -.5px; line-height: 1.2; }
.comp-left > p { font-size: .9rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 24px; }
.comp-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.comp-list li {
  display: flex; align-items: center; gap: 10px;
  font-size: .88rem; color: var(--text-muted);
}
.comp-list i { color: #4caf50; font-size: .9rem; }

.cert-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.cert-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  transition: all var(--tr);
}
.cert-card:hover { transform: translateY(-4px); border-color: rgba(229,57,53,.28); }
.cert-card i { font-size: 2rem; color: var(--gold); margin-bottom: 10px; display: block; }
.cert-card strong { display: block; font-size: .95rem; margin-bottom: 4px; }
.cert-card span { font-size: .78rem; color: var(--text-muted); }

/* ========== 关于我们 ========== */
.about { background: var(--dark3); }
.about-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 60px;
  align-items: center;
}
.about-img-stack { position: relative; }
.about-img-main {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}
.about-img-main svg { width: 100%; height: auto; display: block; }
.about-badge-float {
  position: absolute;
  bottom: -16px;
  right: -16px;
  background: var(--gradient);
  color: #fff;
  padding: 14px 20px;
  border-radius: 12px;
  font-size: .82rem;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(229,57,53,.35);
}
.about-badge-float strong { display: block; font-size: 2rem; font-weight: 900; line-height: 1; }

.about-right .sec-tag { display: inline-block; margin-bottom: 12px; }
.about-right h2 { font-size: 2rem; font-weight: 900; margin-bottom: 16px; letter-spacing: -.5px; }
.about-lead { font-size: 1rem; font-weight: 500; color: var(--text); line-height: 1.8; margin-bottom: 12px; }
.about-body { font-size: .88rem; color: var(--text-muted); line-height: 1.85; margin-bottom: 10px; }

.about-timeline { margin-top: 28px; display: flex; flex-direction: column; gap: 14px; }
.tl-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding-left: 4px;
  position: relative;
}
.tl-item::before {
  content: '';
  position: absolute;
  left: 38px;
  top: 24px;
  bottom: -14px;
  width: 1px;
  background: var(--border);
}
.tl-item:last-child::before { display: none; }
.tl-year {
  flex-shrink: 0;
  width: 46px;
  font-size: .82rem;
  font-weight: 800;
  color: var(--red);
  padding-top: 2px;
}
.tl-event {
  font-size: .85rem;
  color: var(--text-muted);
  line-height: 1.6;
  padding-bottom: 2px;
}

/* ========== 用户评价 ========== */
.reviews { background: var(--dark2); }
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.rv-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: all var(--tr);
}
.rv-card:hover { transform: translateY(-5px); border-color: rgba(229,57,53,.25); }
.rv-stars { font-size: 1.1rem; color: var(--gold); letter-spacing: 2px; margin-bottom: 12px; }
.rv-card p { font-size: .86rem; color: var(--text-muted); line-height: 1.75; margin-bottom: 18px; font-style: italic; }
.rv-user { display: flex; align-items: center; gap: 12px; }
.rv-av {
  width: 38px; height: 38px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: .95rem; color: #fff; flex-shrink: 0;
}
.rv-user strong { display: block; font-size: .88rem; margin-bottom: 2px; }
.rv-user span { font-size: .76rem; color: var(--text-muted); }

/* ========== 联系我们 ========== */
.contact { background: var(--dark3); }
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: start;
}
.contact-left .sec-tag { display: inline-block; margin-bottom: 12px; }
.contact-left h2 { font-size: 2rem; font-weight: 900; margin-bottom: 14px; letter-spacing: -.5px; }
.contact-left > p { font-size: .9rem; color: var(--text-muted); line-height: 1.8; margin-bottom: 30px; }

.cinfo-list { display: flex; flex-direction: column; gap: 18px; margin-bottom: 28px; }
.cinfo-item { display: flex; align-items: flex-start; gap: 14px; }
.cinfo-icon {
  width: 42px; height: 42px;
  background: rgba(229,57,53,.1);
  border: 1px solid rgba(229,57,53,.2);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--red); font-size: .95rem; flex-shrink: 0;
}
.cinfo-item strong { display: block; font-size: .84rem; margin-bottom: 2px; }
.cinfo-item span { font-size: .86rem; color: var(--text-muted); }

.map-placeholder {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 18px;
  font-size: .84rem;
  color: var(--text-muted);
}
.map-placeholder i { color: var(--red); font-size: 1.1rem; }
.map-link {
  margin-left: auto;
  color: var(--red-light);
  font-weight: 600;
  font-size: .78rem;
  transition: color var(--tr);
}
.map-link:hover { color: var(--red); }

.form-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.form-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 24px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}
.form-card h3 i { color: var(--red); }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.fg { margin-bottom: 18px; }
.fg label {
  display: block;
  font-size: .8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 7px;
}
.fg label em { color: var(--red); font-style: normal; margin-left: 2px; }
.fg input,
.fg select,
.fg textarea {
  width: 100%;
  background: rgba(10,3,3,.7);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 11px 14px;
  color: var(--text);
  font-family: var(--font);
  font-size: .87rem;
  outline: none;
  transition: border-color var(--tr), box-shadow var(--tr);
  appearance: none;
}
.fg input::placeholder,
.fg textarea::placeholder { color: rgba(176,128,128,.45); }
.fg input:focus,
.fg select:focus,
.fg textarea:focus {
  border-color: rgba(229,57,53,.5);
  box-shadow: 0 0 0 3px rgba(229,57,53,.1);
}
.fg textarea { resize: none; }

.radio-group { display: flex; gap: 16px; flex-wrap: wrap; padding-top: 4px; }
.radio-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .84rem;
  color: var(--text-muted);
  cursor: pointer;
}
.radio-item input { accent-color: var(--red); width: 15px; height: 15px; cursor: pointer; }

.btn-submit-form {
  width: 100%;
  background: var(--gradient);
  color: #fff;
  border: none;
  padding: 14px;
  border-radius: 50px;
  font-size: .95rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  transition: all var(--tr);
  box-shadow: 0 8px 24px rgba(229,57,53,.3);
  font-family: var(--font);
}
.btn-submit-form:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(229,57,53,.45); }
.form-note {
  text-align: center;
  font-size: .75rem;
  color: var(--text-muted);
  margin-top: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.form-note i { color: #4caf50; }

/* ========== 页脚 ========== */
.footer {
  background: var(--dark2);
  border-top: 1px solid var(--border);
  padding-top: 56px;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}
.ft-brand .logo-footer { margin-bottom: 14px; }
.ft-brand p {
  font-size: .84rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 18px;
  max-width: 260px;
}
.ft-social { display: flex; gap: 10px; }
.ft-social a {
  width: 36px; height: 36px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: .9rem;
  color: var(--text-muted);
  transition: all var(--tr);
}
.ft-social a:hover {
  background: rgba(229,57,53,.14);
  border-color: rgba(229,57,53,.3);
  color: var(--red-light);
  transform: translateY(-2px);
}
.ft-links h4 { font-size: .88rem; font-weight: 700; margin-bottom: 14px; }
.ft-links ul { list-style: none; display: flex; flex-direction: column; gap: 9px; }
.ft-links a { font-size: .82rem; color: var(--text-muted); transition: color var(--tr); }
.ft-links a:hover { color: var(--red-light); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 18px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}
.footer-bottom p { font-size: .76rem; color: var(--text-muted); }

/* ========== 返回顶部 ========== */
.back-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px; height: 44px;
  background: var(--gradient);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: .95rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 20px rgba(229,57,53,.4);
  opacity: 0;
  transform: translateY(12px);
  transition: all var(--tr);
  z-index: 800;
}
.back-top.show { opacity: 1; transform: translateY(0); }
.back-top:hover { transform: translateY(-3px); box-shadow: 0 10px 28px rgba(229,57,53,.5); }

/* ========== Toast ========== */
.toast {
  position: fixed;
  top: 24px;
  right: 24px;
  background: var(--dark4);
  border: 1px solid rgba(229,57,53,.3);
  border-radius: 12px;
  padding: 14px 20px;
  color: var(--text);
  font-size: .88rem;
  z-index: 9999;
  transform: translateX(130%);
  transition: transform .4s cubic-bezier(.4,0,.2,1);
  max-width: 300px;
  box-shadow: 0 12px 32px rgba(0,0,0,.4);
}
.toast.show { transform: translateX(0); }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .comp-layout,
  .about-layout { grid-template-columns: 1fr; gap: 40px; }
  .about-badge-float { bottom: -12px; right: -8px; }
}

@media (max-width: 768px) {
  .topbar-sep { display: none; }
  .topbar-inner > span:not(:first-child) { display: none; }

  .hero {
    grid-template-columns: 1fr;
    padding: 44px 24px 60px;
    text-align: center;
    min-height: auto;
  }
  .hero-sub { margin: 0 auto 32px; }
  .hero-btns { justify-content: center; }
  .hero-certs { justify-content: center; }
  .hero-right { display: none; }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: rgba(10,3,3,.98);
    padding: 14px;
    flex-direction: column;
    border-bottom: 1px solid var(--border);
    z-index: 999;
  }
  .nav-links.open { display: flex; }
  .hamburger { display: flex; }
  .btn-consult { display: none; }

  .brand-bar-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
  }
  .bb-sep { display: none; }
  .bb-item { border: 1px solid var(--border); }

  .products-grid { grid-template-columns: 1fr; max-width: 380px; margin: 0 auto; }
  .adv-grid { grid-template-columns: 1fr; }

  .contact-layout { grid-template-columns: 1fr; gap: 36px; }
  .form-row { grid-template-columns: 1fr; }

  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}