:root {
  --gold: #c9a84c;
  --gold-l: #f0c84a;
  --gold-d: #8a6e2f;
  --black: #080808;
  --dark: #111;
  --dark2: #181818;
  --dark3: #202020;
  --white: #fff;
  --gray: #888;
  --gray-l: #ccc;
  --font: "Kanit", "Sarabun", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font);
  background: var(--black);
  color: var(--white);
  overflow-x: hidden;
}

/* --- 滚动条 --- */
html::-webkit-scrollbar,
body::-webkit-scrollbar {
  display: none;
}

html,
body {
  -ms-overflow-style: none; /* IE and Edge */
  scrollbar-width: none; /* Firefox */
}

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

/* --- 导航栏 --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(8, 8, 8, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(201, 168, 76, 0.18);
  padding: 0 5%;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.3s;
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-logo img {
  height: 60px;
  width: auto;
  filter: brightness(0) invert(1);
}

.nav-menu {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-menu a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  font-size: 0.87rem;
  font-weight: 500;
  transition: color 0.25s;
}

.nav-menu a:hover {
  color: var(--gold);
}

.nav-cta {
  background: linear-gradient(135deg, var(--gold), var(--gold-d));
  color: #000;
  padding: 9px 22px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  transition: all 0.3s;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(201, 168, 76, 0.35);
}

/* --- 语言切换 --- */
.lang-switcher {
  display: flex;
  gap: 6px;
  align-items: center;
}

.lang-btn {
  background: rgba(201, 168, 76, 0.1);
  border: 1px solid rgba(201, 168, 76, 0.25);
  color: rgba(255, 255, 255, 0.7);
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  text-transform: uppercase;
}

.lang-btn:hover {
  background: rgba(201, 168, 76, 0.2);
  color: var(--gold);
}

.lang-btn.active {
  background: var(--gold);
  color: #000;
  border-color: var(--gold);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--gold);
  display: block;
  transition: all 0.3s;
}

.mob-nav {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 999;
  background: rgba(8, 8, 8, 0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(201, 168, 76, 0.15);
  flex-direction: column;
  padding: 16px 5% 24px;
}

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

.mob-nav a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 500;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mob-nav a.cta {
  color: var(--gold);
  font-weight: 700;
  border-bottom: none;
  margin-top: 8px;
}

/* --- HERO --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 64px;
  padding-bottom: 140px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image: url("../aircool-assets/Hero/haibao.webp");
  background-size: cover;
  background-position: center bottom;
  background-repeat: no-repeat;
}

.hero-scroll {
  position: absolute;
  bottom: 90px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  animation: bob 2s ease-in-out infinite;
}

.hero-scroll span {
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.hero-scroll svg {
  width: 22px;
  height: 22px;
}

@keyframes bob {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }

  50% {
    transform: translateX(-50%) translateY(8px);
  }
}

.hero-stats {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 3;
  display: flex;
  justify-content: center;
  background: rgba(8, 8, 8, 0.78);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(201, 168, 76, 0.2);
}

.stat {
  flex: 1;
  max-width: 200px;
  min-width: 120px;
  text-align: center;
  padding: 16px 10px;
  border-right: 1px solid rgba(201, 168, 76, 0.1);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.stat:last-child {
  border-right: none;
}

.stat-n {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--gold);
  line-height: 1;
}

.stat-l {
  font-size: 0.85rem;
  color: var(--gray);
  margin-top: 4px;
  line-height: 1.3;
  word-break: keep-all;
  white-space: nowrap;
}

/* --- 通用区块 --- */
section {
  padding: 80px 5%;
}

.inner {
  max-width: 1200px;
  margin: 0 auto;
}

.sec-title {
  text-align: center;
  margin-bottom: 52px;
}

.sec-title h2 {
  font-size: clamp(1.5rem, 3.2vw, 2.3rem);
  font-weight: 800;
  line-height: 1.2;
}

.sec-title h2 span {
  color: var(--gold);
}

.tline {
  width: 54px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--gold), transparent);
  margin: 14px auto 0;
}

.gold-stripe {
  background: linear-gradient(
    90deg,
    transparent 0%,
    #5b3307 8%,
    #8c5818 22%,
    #c18a36 50%,
    #8c5818 78%,
    #5b3307 92%,
    transparent 100%
  );
  padding: 14px 40px;
  text-align: center;
  margin: 0 -5% 52px;
  box-shadow: inset 0 0 0 1px rgba(255, 214, 140, 0.08);
}

.gold-stripe h2 {
  font-size: clamp(1rem, 2.2vw, 1.7rem);
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.04em;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.45);
}

/* --- 产品展示 --- */
/* .products-bg {
  background: #040404;
} */

/* Gen 1 & 2 --- 第一、二代 --- */
.gen-comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 70px;
  align-items: start;
  background: transparent;
  border: none;
  margin-bottom: 26px;
  padding: 10px 0 20px;
}

.gen-col {
  display: grid;
  grid-template-columns: minmax(160px, 220px) minmax(0, 1fr);
  align-items: center;
  column-gap: 26px;
  min-height: 360px;
}

.gen-header {
  padding: 0;
  text-align: left;
  border-bottom: none;
  margin-bottom: 14px;
}

.gen-header h3 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  color: #8ee8ff;
  margin: 0;
  letter-spacing: 0.02em;
  text-shadow: 0 0 18px rgba(51, 213, 255, 0.18);
}

.gen-img-wrap {
  /* background: transparent; */
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  min-height: 360px;
}

.gen-img-wrap img {
  max-width: 100%;
  max-height: 360px;
  width: auto;
  height: auto;
  object-fit: contain;
  opacity: 1;
}

.gen-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}

.gen-features {
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.gen-feature-item {
  display: block;
}

.gen-feature-item::before {
  content: none;
}

.gen-feature-item p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.9;
  font-weight: 500;
  margin: 0;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

/* Product 3 */
.prod3 {
  position: relative;
  padding: 18px 0 8px;
  background: transparent;
  border: none;
  border-radius: 0;
  overflow: visible;
  box-shadow: none;
}

.prod3::before {
  content: none;
}

.prod3-head {
  text-align: center;
  margin-bottom: 26px;
}

.prod3-title-sm {
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.25;
  font-weight: 700;
  color: #d3a04e;
  margin-bottom: 6px;
}

.prod3-title-lg {
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.25;
  font-weight: 700;
  color: #d3a04e;
}

.prod3-stage {
  position: relative;
  left: -20%;
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
  gap: 12px;
  align-items: center;
  width: 100%;
}

.prod3-left-block {
  display: grid;
  grid-template-columns: minmax(0, 0.65fr) minmax(0, 1.35fr);
  gap: 12px;
  align-items: center;
  margin-top: 28px;
  position: relative;
  left: 20%;
  width: 100%;
}

.prod3-left-image {
  position: relative;
  left: -10%;
  order: 2;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  min-height: auto;
}

.prod3-left-image img {
  width: min(100%, 420px);
  max-height: 430px;
  object-fit: contain;
}

.prod3-left-text {
  margin: 0;
  padding-right: 20%;
  order: 1;
  max-width: none;
  text-align: left;
  color: rgba(255, 255, 255, 0.92);
  font-size: 1rem;
  line-height: 1.9;
  font-weight: 500;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

.prod3-right-block {
  position: relative;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  width: 100%;
  min-height: auto;
}

.prod3-seat-image {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  width: 100%;
}

.prod3-seat-image img {
  width: min(100%, 416px);
  max-height: 496px;
  object-fit: contain;
  margin: 0;
}

.prod3-stage-desc {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  width: 100%;
  min-height: 100%;
}

.prod3-stage-desc p {
  margin: 0;
  padding-left: 8%;
  color: rgba(255, 255, 255, 0.92);
  font-size: 1rem;
  line-height: 1.9;
  font-weight: 500;
  text-align: left;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

/* --- 第三代特性 --- */
.prod3-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
  padding: 0 20px;
}

.prod3-feature-card {
  background: linear-gradient(
    135deg,
    rgba(201, 168, 76, 0.08) 0%,
    rgba(201, 168, 76, 0.02) 100%
  );
  border: 1px solid rgba(201, 168, 76, 0.2);
  border-radius: 16px;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.prod3-feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}

.prod3-feature-card:hover {
  transform: translateY(-8px);
  border-color: rgba(201, 168, 76, 0.5);
  background: linear-gradient(
    135deg,
    rgba(201, 168, 76, 0.15) 0%,
    rgba(201, 168, 76, 0.05) 100%
  );
  box-shadow: 0 12px 32px rgba(201, 168, 76, 0.2);
}

.prod3-feature-card:hover::before {
  opacity: 1;
}

.prod3-feature-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--gold), var(--gold-d));
  border-radius: 50%;
  margin-bottom: 20px;
  color: #000;
  transition: all 0.4s;
}

.prod3-feature-card:hover .prod3-feature-icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 8px 24px rgba(201, 168, 76, 0.4);
}

.prod3-feature-icon svg {
  width: 32px;
  height: 32px;
  stroke-width: 2.5;
}

.prod3-feature-content h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.95);
  line-height: 1.7;
  margin: 0;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* --- 技术特色 --- */
.tech-bg {
  background: var(--black);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tech-card {
  background: var(--dark2);
  border: 1px solid rgba(201, 168, 76, 0.1);
  border-radius: 12px;
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s;
}

.tech-card:hover {
  border-color: rgba(201, 168, 76, 0.3);
  transform: translateY(-3px);
}

.tech-num {
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 2.6rem;
  font-weight: 900;
  color: rgba(201, 168, 76, 0.05);
  line-height: 1;
}

.tech-ico {
  font-size: 2rem;
  margin-bottom: 12px;
}

.tech-card h3 {
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: 8px;
}

.tech-card p {
  font-size: 0.79rem;
  color: var(--gray-l);
  line-height: 1.75;
  font-weight: 300;
}

/* --- 特色功能 --- */
.features-bg {
  background: var(--dark);
  padding: 50px 5%;
}

.features-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  max-width: 1100px;
  margin: 0 auto;
}

.feature-card {
  background: var(--dark2);
  border: 2px solid rgba(201, 168, 76, 0.15);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  flex: 1;
  max-width: 260px;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--gold);
  box-shadow: 0 8px 24px rgba(201, 168, 76, 0.25);
}

.feature-img-wrap {
  width: 100%;
  background: var(--dark3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.feature-title {
  padding: 16px 20px;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.5;
}

/* --- 颜色选择 --- */
.colors-bg {
  background: var(--dark);
}

.colors-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 50px;
}

.color-card {
  border-radius: 12px;
  overflow: hidden;
  border: 2px solid transparent;
  transition: all 0.3s;
  cursor: pointer;
}

.color-card:hover {
  border-color: var(--gold);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.color-img {
  width: 100%;
  aspect-ratio: 9/16;
  object-fit: cover;
  object-position: top;
}

.color-info {
  background: var(--dark3);
  padding: 12px 14px;
}

.color-name {
  font-size: 0.83rem;
  font-weight: 600;
}

.color-desc {
  font-size: 0.68rem;
  color: var(--gray);
  margin-top: 2px;
  font-weight: 300;
}

/* --- 图片预览 --- */
.image-preview-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(10px);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  cursor: pointer;
}

.image-preview-overlay.active {
  display: flex;
  opacity: 1;
}

.preview-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 10000;
  padding: 0;
}

.preview-close-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: var(--gold);
  transform: rotate(90deg);
}

.preview-close-btn svg {
  width: 24px;
  height: 24px;
  color: #fff;
}

.image-preview-container {
  width: 90%;
  max-width: 1200px;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.3s ease;
  cursor: default;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.image-preview-container img {
  max-width: 100%;
  max-height: 90vh;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
  pointer-events: none;
}

/* Materials */
.mats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.mat-card {
  background: var(--dark3);
  border: 1px solid rgba(201, 168, 76, 0.1);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s;
}

.mat-card:hover {
  border-color: rgba(201, 168, 76, 0.3);
  transform: translateY(-3px);
}

.mat-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.mat-info {
  padding: 18px;
}

.mat-tag {
  font-size: 0.62rem;
  color: var(--gold);
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 5px;
}

.mat-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.mat-desc {
  font-size: 0.76rem;
  color: var(--gray);
  line-height: 1.6;
  font-weight: 300;
}

/* --- 兼容车型 --- */
.compat-bg {
  background: var(--black);
}

.compat-big {
  font-size: clamp(2rem, 5.5vw, 4.2rem);
  font-weight: 900;
  text-align: center;
  margin-bottom: 52px;
  line-height: 1.1;
}

.compat-big span {
  color: var(--gold);
}

.compat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid rgba(201, 168, 76, 0.18);
  border-radius: 16px;
  overflow: hidden;
  gap: 1px;
  background: rgba(201, 168, 76, 0.08);
}

.compat-cell {
  background: var(--dark2);
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  transition: background 0.3s;
}

.compat-cell:hover {
  background: var(--dark3);
}

.compat-cell:nth-child(odd) {
  flex-direction: row-reverse;
}

.compat-label {
  font-size: clamp(1rem, 2.3vw, 1.55rem);
  font-weight: 800;
  white-space: nowrap;
}

.compat-img {
  height: 88px;
  width: auto;
  object-fit: contain;
  flex: 1;
  max-width: 260px;
}

/* --- 页脚 --- */
.footer {
  background: var(--dark);
  border-top: 1px solid rgba(201, 168, 76, 0.18);
  padding: 60px 5% 28px;
}

.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 60px;
  margin-bottom: 44px;
}

.footer-logo {
  margin-bottom: 12px;
}

.footer-logo img {
  height: 40px;
  width: auto;
  filter: brightness(0) invert(1);
}

.footer-tagline {
  font-size: 1rem;
  color: var(--gray);
  font-weight: 300;
  line-height: 1.7;
  margin-bottom: 22px;
}

.info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.info-item .lbl {
  font-size: 0.75rem;
  color: var(--gold);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 3px;
}

.info-item .val {
  font-size: 0.95rem;
  color: var(--gray-l);
  font-weight: 300;
  line-height: 1.5;
}

.footer-right {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* --- 认证标识 --- */
.badges {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.badge-img {
  height: 100px;
  width: 100px;
  object-fit: contain;
  transition: transform 0.25s;
}

.badge-img:hover {
  transform: scale(1.05);
}

.footer-brand {
  display: flex;
  justify-content: flex-end;
}

.footer-brand img {
  height: 130px;
  width: auto;
  filter: brightness(0) invert(1);
}

/* --- 社交媒体 --- */
.socials {
  display: flex;
  gap: 12px;
  margin-top: 0;
  justify-content: flex-end;
}

.soc {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
  cursor: pointer;
  text-decoration: none;
  background: var(--dark3);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 0;
}

.soc:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
  border-color: rgba(201, 168, 76, 0.3);
}

.soc img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-bottom-title {
  font-size: 1.2rem;
  color: var(--white);
  font-weight: 600;
  text-align: center;
  margin: 0;
}

.footer-bottom-contact {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 30px;
  flex-wrap: wrap;
}

.footer-bottom-contact p {
  font-size: 0.9rem;
  color: var(--gray);
  font-weight: 300;
  margin: 0;
  white-space: nowrap;
}

.footer-bottom-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
}

.footer-bottom-logo img {
  height: 50px;
  width: auto;
  filter: brightness(0) invert(1);
}

.footer-bottom-copyright p {
  font-size: 0.9rem;
  color: var(--gray);
  font-weight: 300;
  margin: 0;
}

/* --- 淡入动画 --- */
.fade {
  opacity: 0;
  transform: translateY(26px);
  transition:
    opacity 0.6s ease,
    transform 0.6s ease;
}

.fade.vis {
  opacity: 1;
  transform: translateY(0);
}

/* --- 响应式 --- */
@media (max-width: 960px) {
  .nav-menu,
  .nav-cta {
    display: none;
  }

  .lang-switcher {
    order: -1;
  }

  .hamburger {
    display: flex;
  }

  .hero {
    min-height: 85vh;
    padding-bottom: 0px;
  }

  .hero-scroll {
    bottom: auto;
    top: 58%;
  }
  .gen-comparison {
    gap: 46px;
    grid-template-columns: 1fr;
  }
  .gen-col {
    grid-template-columns: 1fr;
    row-gap: 20px;
    min-height: auto;
  }

  .gen-copy {
    text-align: center;
  }

  .gen-header {
    text-align: center;
    margin-bottom: 10px;
  }

  .gen-img-wrap {
    min-height: 220px;
    padding: 0;
  }

  .gen-img-wrap img {
    max-height: 240px;
  }

  .gen-feature-item p {
    font-size: 0.94rem;
    line-height: 1.8;
  }

  .prod3-inner {
    grid-template-columns: 1fr;
  }

  .prod3-right {
    border-left: none;
    border-top: 1px solid rgba(201, 168, 76, 0.1);
    padding: 24px;
    max-height: 300px;
  }

  .prod3-right img {
    max-height: 260px;
  }

  .prod3-stage {
    left: 0;
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .prod3-right-block,
  .prod3-seat-image {
    justify-content: center;
  }

  .prod3-seat-image img {
    margin: 0 auto;
  }

  .prod3-stage-desc p {
    text-align: center;
  }

  .prod3-left-block {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-left: 0;
    margin-right: 0;
    left: 0;
    width: 100%;
  }

  .prod3-left-image {
    left: 0;
    justify-content: center;
    order: 1;
  }

  .prod3-left-text {
    text-align: center;
    margin-left: 0;
    order: 2;
  }

  .prod3-features {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 32px;
    padding: 0;
  }

  .prod3-feature-card {
    padding: 24px 20px;
  }

  .prod3-feature-icon {
    width: 56px;
    height: 56px;
  }

  .prod3-feature-icon svg {
    width: 28px;
    height: 28px;
  }

  .prod3-feature-content h4 {
    font-size: 0.98rem;
  }

  .image-preview-container {
    width: 95%;
    max-height: 85vh;
  }

  .preview-close {
    top: -50px;
    width: 44px;
    height: 44px;
  }

  .preview-close svg {
    width: 22px;
    height: 22px;
  }

  .image-preview-container img {
    max-height: 85vh;
  }

  .tech-grid {
    grid-template-columns: 1fr 1fr;
  }

  .colors-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .features-grid {
    gap: 16px;
  }

  .feature-card {
    flex: 1 1 calc(50% - 8px);
    min-width: 180px;
  }

  .feature-title {
    font-size: 0.85rem;
    padding: 14px 16px;
  }

  .mats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .compat-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-right {
    align-items: center;
  }

  .footer-sub {
    text-align: left;
  }

  .footer-bottom {
    gap: 12px;
  }

  .footer-bottom-title {
    font-size: 1rem;
  }

  .footer-bottom-contact {
    flex-direction: column;
    gap: 8px;
  }

  .footer-bottom-contact p {
    font-size: 0.85rem;
  }

  .footer-bottom-row {
    flex-direction: column;
    gap: 12px;
  }

  .footer-bottom-logo img {
    height: 60px;
  }

  .footer-bottom-copyright p {
    font-size: 0.85rem;
    text-align: center;
  }

  .feat-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  section {
    padding: 60px 5%;
  }

  .hero {
    padding-left: 0;
    padding-right: 0;
  }

  .hero-stats {
    width: 100%;
    background: rgba(8, 8, 8, 0.85);
    padding: 8px 0;
    position: relative;
    margin-top: auto;
  }
  .stat {
    min-width: 0;
    border-right: none;
    border-top: 1px solid rgba(201, 168, 76, 0.08);
    padding: 8px 4px;
  }

  .stat-n {
    font-size: 1.3rem;
  }

  .stat-l {
    font-size: 0.7rem;
    line-height: 1.3;
    word-break: keep-all;
    white-space: nowrap;
  }

  .prod3-features {
    grid-template-columns: 1fr;
    gap: 18px;
  }
}

@media (max-width: 768px) {
  .prod3-stage {
    grid-template-columns: 1fr;
  }

  .prod3-left-block {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 0;
    margin-left: 0;
    margin-right: 0;
    left: 0;
    width: 100%;
  }

  .prod3-left-image {
    left: 0;
    justify-content: center;
    min-height: 280px;
    order: 1;
  }

  .prod3-left-text {
    text-align: center;
    margin-left: 0;
    order: 2;
  }

  .prod3-left-image img {
    max-height: 320px;
  }

  .prod3-right-block {
    min-height: auto;
  }

  .prod3-seat-image img {
    max-height: 384px;
  }
}

@media (max-width: 580px) {
  .tech-grid {
    grid-template-columns: 1fr;
  }

  .mats-grid {
    grid-template-columns: 1fr;
  }

  .features-grid {
    gap: 12px;
  }

  .feature-card {
    flex: 1 1 calc(50% - 6px);
    min-width: 140px;
    max-width: calc(50% - 6px);
  }

  .feature-img-wrap {
    height: 140px;
    padding: 12px;
  }

  .feature-title {
    font-size: 0.85rem;
    padding: 12px 14px;
  }

  .compat-cell {
    flex-direction: column !important;
    padding: 14px 10px;
    text-align: center;
  }

  .compat-label {
    text-align: center !important;
    order: 2;
    font-size: 0.85rem;
  }

  .compat-img {
    max-width: 120px;
    height: 55px;
    order: 1;
  }

  .info-grid {
    grid-template-columns: 1fr;
  }

  .badges {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .badge-img {
    height: 70px;
    width: 70px;
  }

  .footer-brand img {
    height: 10  0px;
  }

  .soc {
    width: 48px;
    height: 48px;
  }

  .prod-img-wrap {
    min-height: 160px;
  }
}