:root {
  --color-brand-yellow: #ffc939;
  --color-brand-yellow-deep: #f5a800;
  --color-text-main: #222222;
  --color-text-subtle: #666666;
  --color-bg: #f7f7f9;
  --color-bg-light: #ffffff;
  --shadow-soft: 0 14px 40px rgba(15, 23, 42, 0.12);
  --shadow-card: 0 12px 30px rgba(15, 23, 42, 0.12);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-pill: 999px;
  --transition-fast: 0.3s ease;
  --transition-medium: 0.4s ease;
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    system-ui, sans-serif;
  color: var(--color-text-main);
  background: var(--color-bg);
  scroll-behavior: smooth;
}

body {
  line-height: 1.6;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 导航栏 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(15, 23, 42, 0.04);
  transition: box-shadow var(--transition-fast), background var(--transition-fast);
}

.site-header.is-scrolled {
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  background: rgba(255, 255, 255, 0.98);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.logo-image {
  height: 32px;
  width: auto;
  display: block;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.btn {
  border: none;
  border-radius: var(--radius-pill);
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    background var(--transition-fast), color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-brand-yellow);
  color: #3b2200;
  box-shadow: 0 6px 14px rgba(245, 171, 0, 0.4);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(245, 171, 0, 0.55);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.9);
  color: var(--color-text-main);
  border-radius: var(--radius-pill);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.4);
}

.btn-ghost:hover {
  background: #ffffff;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.12);
  transform: translateY(-1px);
}

.link-button {
  padding: 0;
  border: none;
  background: transparent;
  color: var(--color-text-main);
  font-size: 14px;
  cursor: pointer;
  position: relative;
}

.link-button::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--color-text-main);
  transition: width var(--transition-fast);
}

.link-button:hover::after {
  width: 100%;
}

.btn-outline {
  background: rgba(255, 255, 255, 0.9);
  color: var(--color-text-main);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.6);
}

.btn-outline:hover {
  background: #ffffff;
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.9),
    0 8px 20px rgba(15, 23, 42, 0.15);
  transform: translateY(-1px);
}

.nav-contact-wrapper {
  position: relative;
}

.nav-contact-qr {
  position: absolute;
  right: 0;
  top: 120%;
  transform: translateY(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  z-index: 90;
}

.nav-contact-qr-inner {
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.26);
  padding: 10px 10px 8px;
  width: 190px;
}

.nav-contact-qr-inner img {
  width: 100%;
  border-radius: 12px;
  display: block;
}

.nav-contact-qr-inner p {
  margin: 4px 0 0;
  font-size: 12px;
  color: var(--color-text-subtle);
  text-align: center;
}

.nav-contact-wrapper:hover .nav-contact-qr,
.nav-contact-wrapper.is-open .nav-contact-qr {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Hero 首屏 */
.hero {
  position: relative;
  padding: 180px 0 180px;
  background-color: #000000;
  background-image: url("./banner.png");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
      to bottom,
      rgba(0, 0, 0, 0.55),
      rgba(0, 0, 0, 0.35),
      rgba(0, 0, 0, 0.55)
    );
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
  z-index: 1;
}

.hero-content h1 {
  margin: 12px 0 16px;
  font-size: 40px;
  line-height: 1.2;
  letter-spacing: 0.02em;
  color: #ffffff;
}

.hero-tagline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px 4px 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.15);
  font-size: 12px;
}

.hero-tagline::before {
  content: "";
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: conic-gradient(
    from 220deg,
    #ffc83d,
    #f97316,
    #22c55e,
    #0ea5e9,
    #8b5cf6,
    #ffc83d
  );
}

.hero-subtitle {
  max-width: 480px;
  font-size: 14px;
  color: rgba(249, 250, 251, 0.9);
}

.hero-actions {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-visual {
  position: relative;
  min-height: 180px;
}

/* 通用区块 */
.section {
  padding: 72px 0;
  background: var(--color-bg);
}

.section-light {
  background: #ffffff;
}

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-header h2 {
  margin: 0 0 10px;
  font-size: 26px;
}

.section-subtitle {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-subtle);
}

/* 国风雅色展示区 */
.color-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.color-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: visible;
  cursor: pointer;
  transition: transform var(--transition-medium), filter var(--transition-medium),
    box-shadow var(--transition-medium);
}

.color-card-inner {
  position: relative;
  padding: 15px 0;
  height: auto;
  display: flex;
  align-items: stretch;
  justify-content: stretch;
}

.color-card-bg-pattern {
  display: none;
}

.color-card-border {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(255, 255, 255, 0.5);
  opacity: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0));
  mix-blend-mode: screen;
  transition: opacity var(--transition-medium), box-shadow var(--transition-medium);
}

.color-card-content {
  position: relative;
  z-index: 1;
  display: flex;
  width: 100%;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.color-card-text-vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.22em;
  font-size: 16px;
  color: rgba(15, 23, 42, 0.9);
  display: flex;
  align-items: center;
  gap: 12px;
  text-shadow: 0 0 0 transparent;
  transition: transform var(--transition-medium), text-shadow var(--transition-medium),
    font-size var(--transition-medium);
}

.color-card-visual {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.color-product-image {
  max-width: 260px;
  width: 100%;
  height: auto;
  border-radius: 32px;
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.26);
  transform: translateY(4px) scale(0.96);
  opacity: 0.9;
  transition: transform var(--transition-medium), box-shadow var(--transition-medium),
    opacity var(--transition-medium), filter var(--transition-medium);
}

.color-vase {
  width: 76px;
  height: 150px;
  border-radius: 46% 46% 44% 44% / 30% 30% 65% 65%;
  position: relative;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.48);
  opacity: 0.5;
  transition: opacity var(--transition-medium), transform var(--transition-medium),
    box-shadow var(--transition-medium);
}

.color-vase::before {
  content: "";
  position: absolute;
  inset: 18% 22%;
  border-radius: inherit;
  background: radial-gradient(circle at 20% 15%, rgba(255, 255, 255, 0.9), transparent 55%);
  mix-blend-mode: screen;
}

.color-device {
  width: 66px;
  height: 130px;
  border-radius: 18px;
  box-shadow: 0 14px 32px rgba(15, 23, 42, 0.55);
  transform: translateX(-4px);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium),
    filter var(--transition-medium);
}

.color-vase--yellow {
  background: none;
}

.color-device--yellow {
  background: none;
}

.color-card--yellow {
  background: transparent;
}

.color-vase--blue {
  background: none;
}

.color-device--blue {
  background: none;
}

.color-card--blue {
  background: transparent;
}

.color-vase--white {
  background: none;
}

.color-device--white {
  background: none;
}

.color-card--white {
  background: transparent;
}

/* 初始统一大小与效果 */
.color-card {
  transform: scale(1);
  filter: brightness(1);
  box-shadow: none;
}

/* 悬停时当前模块 */
.color-card.is-active {
  transform: scale(1.05);
  filter: brightness(1.05);
  box-shadow: 0 22px 55px rgba(15, 23, 42, 0.32);
}

.color-card.is-active .color-product-image {
  opacity: 1;
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 24px 56px rgba(15, 23, 42, 0.36);
  filter: saturate(1.05);
}

.color-card.is-active .color-card-text-vertical {
  font-size: 18px;
  transform: translateX(2px);
  text-shadow: 0 0 12px rgba(255, 255, 255, 0.95);
}

.color-card.is-active .color-card-border {
  opacity: 1;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.6), 0 0 32px rgba(255, 255, 255, 0.8);
}

/* 其他模块变小变暗 */
.color-card.is-inactive {
  transform: scale(0.9);
  filter: brightness(0.8);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.16);
}

/* 产品介绍区 */
.product-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.3fr);
  gap: 40px;
  align-items: center;
}

.product-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-slider {
  position: relative;
  width: 100%;
  max-width: 500px;
  aspect-ratio: 4 / 3;
  /* 移除圆角背景和阴影，让图片直接占满 */
  background: transparent;
  box-shadow: none;
  border-radius: 0;
  overflow: visible; /* 允许指示器在图片下方显示 */
}

.product-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(0.98) translateY(6px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-slide img {
  max-width: 100%;
  max-height: 100%;
  /* 移除图片圆角和阴影，让它完全占满容器 */
  border-radius: 0;
  box-shadow: none;
}

.product-slide.is-active {
  opacity: 1;
  transform: scale(1) translateY(0);
}

.product-dots {
  position: absolute;
  left: 50%;
  bottom: 14px;
  transform: translateX(-50%);
  display: inline-flex;
  gap: 8px;
  /* 允许指示器覆盖在图片下方 */
  z-index: 10;
}

.product-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  border: none;
  padding: 0;
  background: rgba(148, 163, 184, 0.8);
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast),
    width var(--transition-fast);
}

.product-dot.is-active {
  width: 28px;
  height: 12px;
  background: var(--color-brand-yellow-deep);
  transform: translateY(-1px);
}

.product-dot:hover {
  transform: translateY(-1px);
}

.product-visual:hover .product-book {
  transform: rotate(-4deg) translateY(-6px);
  box-shadow: 0 22px 55px rgba(15, 23, 42, 0.32);
}

.product-content h2 {
  margin-top: 0;
  margin-bottom: 10px;
  font-size: 26px;
}

.product-intro {
  margin-top: 0;
  margin-bottom: 18px;
  font-size: 14px;
  color: var(--color-text-subtle);
}

.product-highlights {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 18px;
}

.product-highlights h3 {
  margin: 0 0 4px;
  font-size: 16px;
}

.product-highlights p {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-subtle);
}

/* 功能亮点区 */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.feature-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 20px 18px 18px;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.1);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    translate var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.18);
}

.feature-card h3 {
  margin: 12px 0 8px;
  font-size: 16px;
}

.feature-card p {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-subtle);
}

.feature-icon {
  width: 32px;
  height: 32px;
  border-radius: 12px;
  background: rgba(248, 250, 252, 0.9);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.5);
  position: relative;
}

.feature-icon::before,
.feature-icon::after {
  content: "";
  position: absolute;
}

.feature-icon--voice::before {
  inset: 8px;
  border-radius: 999px;
  border: 2px solid #f97316;
}

.feature-icon--voice::after {
  left: 14px;
  top: 6px;
  bottom: 6px;
  width: 4px;
  border-radius: 999px;
  background: linear-gradient(180deg, #fed7aa, #ea580c);
}

.feature-icon--mic::before {
  left: 11px;
  right: 11px;
  top: 7px;
  bottom: 10px;
  border-radius: 999px;
  border: 2px solid #0ea5e9;
}

.feature-icon--mic::after {
  left: 15px;
  right: 15px;
  bottom: 6px;
  height: 2px;
  border-radius: 999px;
  background: #0ea5e9;
}

.feature-icon--book::before {
  left: 9px;
  right: 9px;
  top: 8px;
  bottom: 7px;
  border-radius: 6px;
  background: linear-gradient(135deg, #e0f2fe, #60a5fa);
}

.feature-icon--book::after {
  left: 13px;
  top: 11px;
  right: 13px;
  height: 2px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 5px 0 rgba(255, 255, 255, 0.7);
}

.feature-icon--gift::before {
  inset: 8px;
  border-radius: 6px;
  background: linear-gradient(135deg, #fee2e2, #fb7185);
}

.feature-icon--gift::after {
  left: 50%;
  top: 4px;
  width: 18px;
  height: 10px;
  transform: translateX(-50%);
  border-radius: 999px 999px 0 0;
  border: 2px solid #fb7185;
  border-bottom: none;
}

/* 产品认证区 */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.cert-item {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 20px 18px 16px;
  text-align: center;
  box-shadow: 0 12px 26px rgba(15, 23, 42, 0.12);
  transition: transform var(--transition-medium), box-shadow var(--transition-medium),
    rotate var(--transition-medium);
}

.cert-badge {
  width: 80px;
  height: 80px;
  margin: 0 auto 10px;
  border-radius: 28px;
  background: #f8fafc;
  position: relative;
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.6);
}

.cert-badge--quality::before,
.cert-badge--safety::before,
.cert-badge--patent::before {
  content: "";
  position: absolute;
  inset: 16px;
  border-radius: inherit;
}

.cert-badge--quality::before {
  background: conic-gradient(from 220deg, #22c55e, #a3e635, #22c55e);
  mask: radial-gradient(circle, transparent 60%, #000 61%);
}

.cert-badge--safety::before {
  border-radius: 50%;
  border: 3px solid #0ea5e9;
  border-top-color: transparent;
  border-right-color: transparent;
}

.cert-badge--patent::before {
  background: linear-gradient(145deg, #fee2e2, #f97316);
  clip-path: polygon(20% 80%, 50% 12%, 80% 80%);
}

.cert-item figcaption {
  font-size: 14px;
  color: var(--color-text-subtle);
}

.cert-item:hover {
  transform: translateY(-6px) rotate(-1.2deg);
  box-shadow: 0 20px 44px rgba(15, 23, 42, 0.22);
}

/* 认证保障区背景图样式 */
.section-cert {
  position: relative;
  background-color: #000000;
  background-image: url("./renzheng.jpg");
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  /* 增加最小高度，让图片区域更大 */
  min-height: 400px; /* 可根据需要调整数值，如 600px、700px 等 */
  /* 或使用 padding-top 来控制宽高比，例如 37.5% 对应 16:9 比例 */
  /* padding-top: 37.5%; */
  padding: 0px 0 50px;  /* 上下内边距，数字可以自己调 */
}

.section-cert::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.30);
  pointer-events: none;
}

.section-cert .container {
  position: relative;
  z-index: 1;
  /* 让容器在垂直方向上居中，适配更大的高度 */
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: inherit; /* 继承父元素的最小高度 */
  padding: 60px 20px; /* 增加内边距，避免内容贴边 */
}

.section-cert .section-header h2 {
  color: #ffffff;
  text-shadow: 0 8px 30px rgba(0, 0, 0, 0.65);
}

/* 联系方式区 */
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.3fr);
  gap: 40px;
  align-items: flex-start;
}

.contact-info h2 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 24px;
}

.contact-block h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.contact-block p {
  margin: 0 0 4px;
  font-size: 14px;
  color: var(--color-text-subtle);
}

.contact-social {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid rgba(148, 163, 184, 0.35);
}

.contact-social-title {
  font-size: 14px;
  margin-bottom: 10px;
}

.contact-social-icons {
  display: grid;
  grid-template-columns: repeat(2, auto);
  column-gap: 10px;
  row-gap: 40px;
}

.contact-social-item {
  position: relative;
  width: 80px;
  height: 80px;
  border-radius: 0;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: none;
  overflow: visible;
}

.contact-social-item img {
  max-width: 500%;
  max-height: 500%;
  display: block;
}

.contact-social-qr {
  position: absolute;
  left: 50%;
  top: 115%;
  transform: translateX(-50%) translateY(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  z-index: 20;
}

.contact-social-qr img {
  width: 300px;
  border-radius: 14px;
  box-shadow: 0 18px 42px rgba(15, 23, 42, 0.4);
}

.contact-social-item:hover .contact-social-qr {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.contact-social-item:focus-within .contact-social-qr {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.contact-form-wrapper {
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 22px 22px 20px;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.12);
}

.contact-form-wrapper h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 18px;
}

.form-row {
  margin-bottom: 14px;
}

.form-row label {
  display: block;
  font-size: 14px;
  margin-bottom: 4px;
}

.form-row input {
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  padding: 9px 11px;
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
    background var(--transition-fast);
  background: #f9fafb;
}

.form-row input:focus {
  border-color: var(--color-brand-yellow-deep);
  box-shadow: 0 0 0 1px rgba(245, 158, 11, 0.7);
  background: #ffffff;
}

.form-error {
  margin: 4px 0 0;
  min-height: 16px;
  font-size: 12px;
  color: #ef4444;
}

.form-submit {
  width: 100%;
  margin-top: 6px;
}

/* 页脚 */
.site-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.28);
  background: #ffffff;
  padding: 18px 0;
  font-size: 12px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-left p {
  margin: 0;
  color: var(--color-text-subtle);
}

.footer-right {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.social-icon {
  width: 24px;
  height: 24px;
  border-radius: 999px;
  display: inline-block;
  position: relative;
  background: #f1f5f9;
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.7);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast),
    background var(--transition-fast);
}

.social-icon::before,
.social-icon::after {
  content: "";
  position: absolute;
}

.social-icon--wechat::before {
  inset: 6px;
  border-radius: 8px;
  background: #22c55e;
}

.social-icon--weibo::before {
  inset: 6px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #ffffff, #f97316);
}

.social-icon--douyin::before {
  inset: 6px;
  border-radius: 6px;
  background: linear-gradient(135deg, #06b6d4, #ec4899);
}

.social-icon:hover {
  transform: translateY(-1px);
  background: #ffffff;
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.18);
}

/* 提交反馈 Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 100px;
  transform: translateX(-50%) translateY(120%);
  background: #111827;
  color: #f9fafb;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  box-shadow: 0 16px 45px rgba(15, 23, 42, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  z-index: 110;
}

.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* 响应式布局 */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 880px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-visual {
    order: -1;
  }

  .product-layout,
  .contact-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .color-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .color-card-inner {
    height: 240px;
  }

  .hero {
    padding-top: 60px;
  }
}

@media (max-width: 640px) {
  .header-inner {
    height: 60px;
  }

  .hero-content h1 {
    font-size: 30px;
  }

  .section {
    padding: 56px 0;
  }

  .feature-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .cert-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .contact-form-wrapper {
    padding: 18px 16px 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }
}